S-8243AACFT-TB-G - Seiko Instruments, Inc.

Rev.2.4_00

BATTRY PROTECTION IC

FOR 3-SERIAL OR 4-SERIAL CELL PACK S-8243A/B Series

Seiko Instruments Inc. 1

The S-8243A/B is a series of lithium-ion rechargeable

battery protection ICs incorporating high-accuracy

battery protection circuits, a battery monitor amp and a

voltage regulator which drives microcomputer and gas

gauge IC. Combining microcomputer or gas gauge IC

facilitates displaying a remaining amount of battery.

The S-8243A/B is suitable for protection of 3-s eri al or

4-serial cell lithium-ion battery packs from

overcharge, overdischarge and overcurrent.

 Features

(1) High-accuracy voltage detection for each cell

• Overcharge detection voltage n (n=1 to 4)

3.9 V to 4.4 V (50 mV step) Accuracy ±25 mV

• Hysteresis voltage n (n=1 to 4) of overcharge detection

−0.10 V to −0.40 V (50 mV step) or 0 V Accuracy ±50 mV

(Overcharge release voltage n (=Overcharge detection voltage n + Hysteresis voltage n) can be

selected within the range 3.8 V to 4.4 V.)

• Overdischarge detection voltage n (n=1 to 4)

2.0 V to 3.0 V (100 mV step) Accuracy ±80 mV

• Hysteresis voltage n (n=1 to 4) of overdischarge detection

0.20 V to 0.70 V or 0 V (100 mV step) Accuracy ±100 mV

(Overdischarge release voltage n (=Overdischarge detection voltage n + Hysteresis voltage n) can

be selected within the range 2.0 V to 3.4 V.)

(2) Three-level overcurrent protection including protection for short-circuiting

• Overcurrent detection voltage 1 0.05 V to 0.3 V (50 mV step) Accuracy ±25 mV

• Overcurrent detection voltage 2 0.5 V Accuracy ±100 mV

• Overcurrent detection voltage 3 VDD/2 Accuracy ±15 %

(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by

external capacitors.

(Delay times for overcurrent detection 2 and 3 are fixed internally.)

(4) Charge/discharge operation can be controlled through the control pins.

(5) High-accuracy battery monitor amp GAMP = VBATTERY × 0.2 ±1.0%

(6) Voltage regulator VOUT = 3.3 V ±2.4 % (3 mA max.)

(7) High input-voltage device Absolute maximum rating: 26 V

(8) Wide operating voltage range 6 V to 18 V

(9) Wide operating temperature range: −40°C to +85 °C

(10) Low current consumption

Operation mode 120 μA max.

Power down mode 0.1 μA max.

(11) Small package 16-Pin TSSOP package

(12) Lead-free products

 Applications

• Lithium-ion rechargeable battery packs

• Lithium polymer rechargeable battery packs

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

 Package

Drawing Code

Package Name Package Tape Reel

16-Pin TSSOP FT016-A FT016-A FT016-A

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 3

 Block Diagrams

S-8243A Series

Battery protection

VC3

VC2

VC1

VDD

DOP

COP

VMP

VREG

VBATOUT

200 nA

CTL1

CTL2

CTL3

1.4 MΩ

1 MΩ

5 MΩ

CTL4

VREG

Delay

control

RVCM,RVSM

DOP,COP,

Delay

Batter y mo nitor amp

Voltage

regulator

1.4 MΩ

660 kΩ

440 kΩ

CCT

VSS

CDT

Battery

selection

Remark1. Diodes in the figure are parasitic diodes.

2. Numerical values are typical values.

Figure 1

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

S-8243B Series

Battery protection

VC3

VC2

VC1

VDD

DOP

COP

VMP

VREG

VBATOUT

200 nA

CTL1

CTL2

CTL3

1.4 MΩ

1 MΩ

5 MΩ

CTL4

VREG

Delay

control

RVCM, RVSM

DOP, COP,

Delay

Battery monitor amp

Voltage

regulator

1.4 MΩ

660 kΩ

440 kΩ

CCT

VSS

CDT

Battery

selection

Remark1. Diodes in the figure are parasitic diodes.

2. Numerical values are typical values.

Figure 2

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 5

 Product Name Structure

1. Product Name

S-8243 x xx FT - TB - G

IC direction in tape specifications*1

Package code

FT : 16-Pin TSSOP

Serial code *2

Sequentially set from AA to ZZ

Product series name

A : 3-cell

B : 4-cell

*1. Refer to the taping specifications at the end of this book.

*2. Refer to the “2. Product Name List”.

2. Product Name List

Table 1 S-8243A Series (For 3-Serial Cell)

Product name/Item Overcharge

detection voltage

]

Hysteresis voltage for

overcharge detection

]

Overdischarge

detection voltage

]

Hysteresis voltage for

overdischarge detection

]

Overcurrent

detection voltage1

IOV1

]

0 V battery

charging

function

S-8243AACFT-TB-G 4.35

0.025 V

−

0.15

0.05 V 2.40

0.08 V 0.20

0.10 V 0.20

0.025 V Available

S-8243AADFT-TB-G 4.35

0.025 V

−

0.35

0.05 V 2.40

0.08 V 0 V 0.20

0.025 V Available

Note

Change in the detection voltage is available in products other than listed above. Contact our sales office.

Table 2 S-8243B Series (For 4-Serial Cell)

Product name/Item Overcharge

detection voltage

]

Hysteresis voltage for

overcharge detection

]

Overdischarge

detection voltage

]

Hysteresis voltage for

overdischarge detection

]

Overcurrent

detection voltage1

IOV1

]

0 V battery

charging

function

S-8243BADFT-TB-G 4.35

0.025 V

−

0.25

0.05 V 2.40

0.08 V 0 V 0.25

0.025 V Available

S-8243BAEFT-TB-G 4.35

0.025 V

−

0.15

0.05 V 2.40

0.08 V 0.20

0.10 V 0.20

0.025 V Available

S-8243BAFFT-TB-G 4.25

0.025 V

−

0.25

0.05 V 2.40

0.08 V 0 V 0.20

0.025 V Available

Note

Change in the detection voltage is available in products other than listed above. Contact our sales office.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

 Pin Configuration

16-Pi n TSSOP

Top view

VDD

DOP

COP

VMP

VC1

VC2

VC3

VSS

VREG

CTL1

CTL2

CTL3

CTL4

VBATOUT

CCT

CDT

Figure 3

Table 3 Pin description (S-8243A Series)

Pin No. Symbol Description

1 VDD Positive power input pin. Battery 1 positive voltage connection pin

2 DOP FET gate connection pin for discharge control (CMOS output)

3 COP FET gate connection pin for charge control (Nch open-drain output)

4 VMP Voltage detection pin between VDD and VMP (Over current detection pin)

5 VC1 No connection

6 VC2 Battery1 negative voltage and battery 2 positive voltage connection pin

7 VC3 Battery 2 negative voltage and battery 3 positive voltage connection pin

8 VSS Negative power input pin. Battery 3 negative voltage connection pin

9 CDT

Capacitor connection pin for overdischarge detection delay time and over current detection1 delay time

10 CCT Capacitor connection pin for overcharge detection delay time

VBATOUT

Output pin for each battery voltage and offset

12 CTL4 Battery selection control signal input

13 CTL3 Battery selection control signal input

14 CTL2 Charge and discharge control signal input

15 CTL1 Charge and discharge control signal input

16 VREG 3.3 V voltage regulator output

Table 4 Pin description (S-8243B Series)

Pin No. Symbol Description

1 VDD Positive power input pin. Battery 1 positive voltage connection pin

2 DOP FET gate connection pin for discharge control (CMOS output)

3 COP FET gate connection pin for charge control (Nch open-drain output)

4 VMP Voltage detection pin between VDD and VMP (Over current detection pin)

5 VC1 Battery1 negative voltage and battery 2 positive voltage connection pin

6 VC2 Battery 2 negative voltage and battery 3 positive voltage connection pin

7 VC3 Battery 3 negative voltage and battery 4 positive voltage connection pin

8 VSS Negative power input pin. Battery 4 negative voltage connection pin

9 CDT

Capacitor connection pin for overdischarge detection delay time and over current detection1 delay time

10 CCT Capacitor connection pin for overcharge detection delay time

11 VBATOUT Output pin for each battery voltage and offset

12 CTL4 Battery selection control signal input

13 CTL3 Battery selection control signal input

14 CTL2 Charge and discharge control signal input

15 CTL1 Charge and discharge control signal input

16 VREG 3.3 V voltage regulator output

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 7

 Absolute Maximum Ratings

Table 5 (Ta = 25°C unless otherwise specified)

Item Symbol Applied Pins Rating Unit

Input voltage VDD VDS ⎯ V

SS−0.3 to VSS+26 V

Input voltage VIN VC1, VC2, VC3,

CCT, CDT VSS−0.3 to VDD+0.3 V

VMP pin Input voltage VMP VMP VSS−0.3 to VSS+26 V

DOP pin output voltage VDOP DOP VSS−0.3 to VDD+0.3 V

COP pin output voltage VCOP COP VSS−0.3 to VSS+26 V

VREG pin output voltage VOUT VREG VSS−0.3 to VDD+0.3 V

CTL1 pin input voltage VCTL1 CTL1 VSS−0.3 to VDD+0.3 V

CTL2 to CTL4 pin input voltage VCTLn CTL2, CTL3, CTL4 VSS−0.3 to VOUT+0.3 V

Cell voltage output voltage VBATOUT VBATOUT VSS−0.3 to VOUT+0.3 V

⎯ 300 (When not mounted on board) mW

Power dissipation PD ⎯ 1100*1 mW

Operation ambient temperature Topr ⎯ −40 to +85 °C

Storage temperature Tstg ⎯ −40 to +125 °C

*1. When mounted on board

[Mounted board]

(1) Board size : 114.3 mm × 76.2 mm × t1.6 mm

(2) Board name : JEDEC STANDARD51-7

Caution The absolute maximum ratings are rated values exceeding which the product could suffer

physical damage. These values must therefore not be exceeded under any conditions.

050 100

150

800

400

Power Dissipation P

(mW)

Ambient Temperature Ta (°C)

1000

600

200

1200

Figure 4 Power Dissipation of Package (When Mounted on Board)

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

 Electrical Characteristics

(1) S-8243A Series Table 6 (1/2) (Ta = 25 °C unless otherwise specified)

Item Symbol Conditions Min. Typ. Max. Unit Test circuit

BATTERY PROTECTION

Overcharge detection voltage n

n=1, 2, 3

VCUn 3.9 V to 4.4 V, 50 mV Step VCUn

−0.025 VCUn VCUn

+0.025 V 4

Hysteresis voltage n of

overcharge detection

n=1, 2, 3 VHCn −0.10 V to −0.40 V, and 0 V VHCn

−0.05 VHCn VHCn

+0.05 V 4

Overdischarge detection voltage

n=1, 2, 3 VDLn 2.0 V to 3.0 V, 100 mV Step VDLn

−0.08 VDLn VDLn

+0.08 V 4

Hysteresis voltage n of

Overdischarge detection

n=1, 2, 3 VHDn 0.20 V to 0.70 V, and 0 V VHDn

−0.10 VHDn VHDn

+0.10 V 4

Overcurrent detection voltage 1 VIOV1 0.05 V to 0.3 V, 50 mV Step VIOV1

−0.025 VIOV1 VIOV1

+0.025 V 4

Overcurrent detection voltage 2 VIOV2 ⎯ VDD−0.60 VDD−0.50 VDD−0.40 V 4

Overcurrent detection voltage 3 VIOV3 ⎯ VDD×0.425 VDD×0.5 VDD×0.575 V 4

Temperature coefficient for

detection and release voltage*1 TCOE1 Ta= −5 °C to +55 °C −1.0 0 1.0 mV/°C 4

Temperature coefficient for

overcurrent detection voltage*2 TCOE2 Ta= −5 °C to +55 °C −0.5 0 0.5 mV/°C 4

0 V BATTERY CHARGING FUNCTION

0 V battery charge starting

charger voltage V0CHA 0 V battery charging available ⎯ 0.8 1.5 V 7

0 V battery charge inhibition

battery voltage V0INH

0 V battery charging unavailable

0.4 0.7 1.1 V 7

INTERNAL RESISTANCE

Internal resistance between

VMP and VDD RVDM V1=V2=V3=3.5 V 500 1100 2400 kΩ 8

Internal resistance between

VMP and VSS RVSM V1=V2=V3=1.8 V 300 700 1500 kΩ 8

VOLTAGE REGULATOR

Output voltage VOUT V

DD=14 V, IOUT=3 mA 3.221 3.300 3.379 V 2

Line regulation ΔVOUT1 V

DD=6 V→18 V, IOUT=3 mA ⎯ 5 15 mV 2

Load regulation ΔVOUT2 V

DD=14 V, IOUT=5 μA→3 mA ⎯ 15 30 mV 2

BATTERY MONITOR AMP

Input offset voltage n

n=1, 2, 3 VOFFn V1=V2=V3=3.5 V 60 165 270 mV 3

Voltage gain n

n=1, 2, 3 GAMPn V1=V2=V3=3.5 V 0.2×0.99 0.2 0.2×1.01 ⎯ 3

INPUT VOLTAGE, OPERATING VOLTAGE

Operating voltage between VDD

and VSS VDSOP ⎯ 6 ⎯ 18 V 4

CTL1 input voltage for High VCTL1H ⎯ VDD×0.8 ⎯ ⎯ V 6

CTL1 input voltage for Low VCTL1L ⎯ ⎯ ⎯ VDD×0.2 V 6

CTLn input voltage for High

n=2, 3, 4 VCTLnH ⎯ VOUT×0.9 ⎯ VOUT V 3, 6

CTLn input voltage for Low

n=2, 3, 4 VCTLnL ⎯ ⎯ ⎯ VOUT×0.1 V 3, 6

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 9

Table 6 (2/2)

Item Symbol Remarks Min. Typ. Max. Unit Test circuit

INPUT CURRENT

Current consumption at not

monitoring VBATOUT IOPE V1=V2=V3=3.5 V, VMP=VDD ⎯ 65 120 μA 1

Current consumption at power

down IPDN V1=V2=V3=1.5 V, VMP=VSS ⎯ ⎯ 0.1 μA 1

Current for VCN at not

monitoring VBATOUT (n=2, 3) IVCnN V1=V2=V3=3.5 V −0.3 0 0.3 μA 3

Current for VC2 at monitoring of

VBATOUT IVC2 V1=V2=V3=3.5 V ⎯ 2.0 7.2 μA 3

Current for VC3 at monitoring of

VBATOUT IVC3 V1=V2=V3=3.5 V ⎯ 1.0 4.0 μA 3

Current for CTL1 at Low ICTL1L V1=V2=V3=3.5 V, VCTL1=0 V −0.4 −0.2 ⎯ μA 5

Current for CTLn at High

n=2,3,4 ICTLnH V

CTLn=VOUT ⎯ 2.5 5 μA 9

Current for CTLn at Low

n=2,3,4 ICTLnL V

CTLn=0 V −5 −2.5 ⎯ μA 9

OUTPUT CURRENT

Leak current COP ICOH V

COP=24 V ⎯ ⎯ 0.1 μA 9

Sink current COP ICOL V

COP=VSS+0.5 V 10 ⎯ ⎯ μA 9

Source current DOP IDOH VDOP=VDD−0.5 V 10 ⎯ ⎯ μA 9

Sink current DOP IDOL V

DOP=VSS+0.5 V 10 ⎯ ⎯ μA 9

Source current VBATOUT I

VBATH VBATOUT=VDD−0.5 V 100 ⎯ ⎯ μA 9

Sink current VBATOUT I

VBATL V

BATOUT=VSS+0.5 V 100 ⎯ ⎯ μA 9

Applied to S-8243AACFT and S-8243AADFT

Item Symbol Conditions Min. Typ. Max. Unit Test circuit

DELAY TIME

Overcharge detection delay time tCU C

CT=0.1 μF 0.5 1.0 1.5 s 5

Overdischarge detection delay

time tDL C

DT=0.1 μF 50 100 150 ms 5

Overcurrent detection delay time 1

tlOV1 C

DT=0.1 μF 5 10 15 ms 5

Overcurrent detection delay time 2

tlOV2 ⎯ 1.5 2.5 4.0 ms 4

Overcurrent detection delay time 3

tlOV3 ⎯ 100 300 600 μs 4

*1. Temperature coefficient for detection and release voltage is applied to overcharge detection voltage n, overcharge release voltage n

overdischarge detection voltage n, and overdischarge release voltage n.

*2. Temperature coefficient for overcurrent detection voltage is applied to over current detection voltage 1 and 2.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

(2) S-8243B Series Table 7 (1/2) (Ta = 25°C unless otherwise specified)

Item Symbol Conditions Min. Typ. Max. Unit Test circuit

DETECTION VOLTAGE

Overcharge detection voltage n

n=1, 2, 3, 4 VCUn 3.9 V to 4.4 V, 50 mV Step VCUn

−0.025 VCun

VCUn

+0.025 V 4

Hysteresis voltage n of overcharge

detection

n=1, 2, 3, 4 VHCn −0.10 V to −0.40 V, and 0 V VHCn

−0.05 VHCn VHCn

+0.05 V 4

Overdischarge detection voltage

n=1, 2, 3, 4 VDLn 2.0 V to 3.0 V, 100 mV Step VDLn

−0.08 VDLn VDLn

+0.08 V 4

Hysteresis voltage n of

overdischarge detection

n=1, 2, 3, 4 VHDn 0.20 to 0.70, and 0 VHDn

−0.10 VHDn VHDn

+0.10 V 4

Overcurrent detection voltage 1 VIOV1 0.05 V to 0.3 V, 50 mV Step VIOV1

−0.025 VIOV1 VIOV1

+0.025 V 4

Overcurrent detection voltage 2 VIOV2 ⎯ VDD−0.60 VDD−0.50 VDD−0.40 V 4

Overcurrent detection voltage 3 VIOV3 ⎯ VDD

×0.425 VDD

×0.5 VDD

×0.575 V 4

Temperature coefficient for

detection and release voltage*1 TCOE1 Ta= −5°C to +55°C −1.0 0 1.0 mV/°C4

Temperature coefficient for

overcurrent detection voltage*2 TCOE2 Ta= −5°C to +55°C −0.5 0 0.5 mV/°C4

0 V BATTERY CHARGING FUNCTION (The 0 V battery function is either "0 V battery charging is allowed." or "0 V battery charging is

inhibited." depending upon the product type.)

0 V battery charge starting charger

voltage V0CHA 0 V battery charging allowed ⎯ 0.8 1.5 V 7

0 V battery charge inhibition battery

voltage V0INH 0 V battery charging inhibited 0.4 0.7 1.1 V 7

INTERNAL RESISTANCE

Internal resistance between VMP

and VDD RVDM V1=V2=V3=V4=3.5 V 500 1100 2400 kΩ 8

Internal resistance between VMP

and VSS RVSM V1=V2=V3=V4=1.8 V 300 700 1500 kΩ 8

VOLTAGE REGULATOR

Output voltage VOUT V

DD=14V, IOUT=3 mA 3.221 3.300 3.379 V 2

Line regulation ΔVOUT1 V

DD=6 V→18 V, IOUT=3 mA ⎯ 5 15 mV 2

Load regulation ΔVOUT2 V

DD=14 V, IOUT=5 μA→3 mA ⎯ 15 30 mV 2

BATTERY MONITOR AMP

Input offset voltage n

n=1, 2, 3, 4 VOFFn V1=V2=V3= V4=3.5 V 60 165 270 mV 3

Voltage gain n

n=1, 2, 3, 4 GAMPn V1=V2=V3= V4=3.5 V 0.2×0.99 0.2 0.2×1.01 ⎯ 3

INPUT VOLTAGE, OPERATING VOLTAGE

Operating voltage between VDD

and VSS VDSOP ⎯ 6 ⎯ 18 V 4

CTL1 input voltage for High VCTL1H ⎯ VDD×0.8 ⎯ ⎯ V 6

CTL1 input voltage for Low VCTL1L ⎯ ⎯ ⎯ VDD×0.2 V 6

CTLn input voltage for High

n=2, 3, 4 VCTLnH ⎯ VOUT×0.9 ⎯ VOUT V 3, 6

CTLn input voltage for Low

n=2, 3, 4 VCTLnL ⎯ ⎯ ⎯ VOUT×0.1 V 3, 6

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 11

Table 7 (2/2)

Item Symbol Remarks Min. Typ. Max. Unit Test circuit

INPUT CURRENT

Current consumption at not

monitoring VBATOUT IOPE

3.5 V, V

⎯ 65 120 μA 1

Current consumption at power

down IPDN

1.5 V, V

⎯ ⎯ 0.1 μA 1

Current for VCn at not monitoring

VBATOUT (n=1, 2, 3) IVCnN V1=V2=V3=V4=3.5 V −0.3 0 0.3 μA 3

Current for VC1 at monitoring of

VBATOUT IVC1 V1=V2=V3=V4=3.5 V ⎯ 3.2 10.4 μA 3

Current for VC2 at monitoring of

VBATOUT IVC2 V1=V2=V3=V4=3.5 V ⎯ 2.0 7.2 μA 3

Current for VC3 at monitoring of

VBATOUT IVC3

3.5 V, V

CTL1

0 V

⎯ 1.0 4.0 μA 3

Current for CTL1 at Low ICTL1L

3.5 V, V

CTL1

0 V

−0.4 −0.2 ⎯ μA 5

Current for CTLn at High

n=2, 3, 4 ICTLnH V

CTLn=VOUT ⎯ 2.5 5 μA 9

Current for CTLn at Low

n=2, 3, 4 ICTLnL V

CTLn=0 V −5 −2.5 ⎯ μA 9

OUTPUT CURRENT

Leak current COP ICOH V

COP=24 V ⎯ ⎯ 0.1 μA 9

Sink current COP ICOL V

COP=VSS+0.5 V 10 ⎯ ⎯ μA 9

Source current DOP IDOH V

DOP=VDD−0.5 V 10 ⎯ ⎯ μA 9

Sink current DOP IDOL V

DOP=VSS+0.5 V 10 ⎯ ⎯ μA 9

Source current VBATOUT I

VBATH V

BATOUT=VDD−0.5 V 100 ⎯ ⎯ μA 9

Sink current VBATOUT I

VBATL VBATOUT=VSS+0.5 V 100 ⎯ ⎯ μA 9

Applied to S-8243BAEFT and S-8243BAFFT

Item Symbol Conditions Min. Typ. Max. Unit Test circuit

DELAY TIME

Overcharge detection delay time tCU C

CT=0.1 μF 0.5 1.0 1.5 s 5

Overdischarge detection delay

time tDL C

DT=0.1 μF 50 100 150 ms 5

Overcurrent detection delay time 1 tlOV1 C

DT=0.1 μF 5 10 15 ms 5

Overcurrent detection delay time 2 tlOV2 ⎯ 1.5 2.5 4.0 ms 4

Overcurrent detection delay time 3 tlOV3 ⎯ 100 300 600 μs 4

Applied to S-8243BADFT

Item Symbol Conditions Min. Typ. Max. Unit Test circuit

DELAY TIME

Overcharge detection delay time tCU C

CT=0.1 μF 0.5 1.0 1.5 s 5

Overdischarge detection delay

time tDL C

DT=0.1 μF 55.5 111 222 ms 5

Overcurrent detection delay time 1 tlOV1 C

DT=0.1 μF 3.31 6.62 13.2 ms 5

Overcurrent detection delay time 2 tlOV2 ⎯ 1.5 2.5 4.0 ms 4

Overcurrent detection delay time 3 tlOV3 ⎯ 100 300 600 μs 4

*1. Temperature coefficient for detection and release voltage is applied to overcharge detection voltage n, overcharge release voltage n

overdischarge detection voltage n, and overdischarge release voltage n.

*2. Temperature coefficient for overcurrent detection voltage is applied to over current detection voltage 1 and 2.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

 Test Circuits

In this chapter test methods are explained for the case of S-8243B series, which is designed for 4-serial cell

pack. For the case of S-8243A series, which is designed for 3-serial cell, voltage source V2 should be

shorted, V3 should be read as V2, and V4 as V3.

1. Current consumption (Test circuit 1)

Current consumption at not monitoring VBATOUT, IOPE , is a current measured at the VSS pin when V1 = V2

= V3 = V4 = 3.5 V and VMP = VDD. Current consumption at power down, IPDN, is a current measured at the

VSS pin when V1 = V2 = V3 = V4 = 1.5 V and VMP = VSS.

2. Voltage regulator (Test circuit 2)

Output voltage of the regulator VOUT is a voltage measured at the VREG pin when VDD = VMP = 14 V and

IOUT = 3 mA.

Line regulation of the voltage regulator ΔVOUT1 is defined by the equation ΔVOUT1 = VOUT2−VOUT1 where

VOUT1 is the output voltage when VDD = VMP = 6 V and IOUT = 3 mA, and VOUT2 is the output voltage when

VDD = VMP = 18 V and IOUT = 3 mA.

Load regulation of the regulator is defined by the equation ΔVOUT2 = VOUT3−VOUT where VOUT3 is the output

voltage when VDD = VMP = 14 V and IOUT = 5 μA.

3. Battery monitor amp and pin current for VC1 to VC3 (Test circuit 3)

Voltage gain of the battery monitor amp for each cell is defined by the input offset voltage and the

measurement result provided from the VBATOUT pin for the combination of the CTL3 pin and CTL4 pin

expressed by the following table at the condition where V1 = V2 = V3 = V4 = 3.5 V. Pin current for VC1 to

VC3, IVCn and IVCnN are at the same time measured.

Table 8

CTL3 pin status CTL4 pin status VBATOUT pin output VCn (n=1, 2, 3) pin current

VCTL3H min. VCTL4H min. VOFF1 I

VC1 at VC1 pin

VCTL3H min. Open VBAT1 ⎯

VCTL3H min. VCTL4L max. VOFF2 I

VC2 at VC2 pin

Open VCTL4H min. VBAT2 ⎯

Open Open VOFF3 I

VC3 at VC3 pin

Open VCTL4L max. VBAT3 ⎯

VCTL3L max. VCTL4H min. VOFF4 IVCnN at VCn pin (n=1, 2, 3)

VCTL3L max. Open VBAT4 ⎯

Voltage gain of the battery monitor amp for each cell is calculated by the equation

GAMPn = (VBATn −VOFFn) / Vn (n = 1 to 4)

4. Overcharge detection voltages, overcharge detection hysteresis, ov erdischarge detection

voltages, overdischarge detection hysteresis, and overcurrent detection voltages (Test circuit 4)

〈〈Overcharge detection voltages, hysteresis voltages, and overdischarge detection voltages〉〉

In the following VMP = VDD and the CDT pin is open.

The COP pin and the DOP pin should provide “Low”, which is a voltage equal to VDD × 0.1 V or lower,

in the condition that V1 = V2 = V3 = V4 = 3.5 V.

The overcharge detection voltage VCU1 is defined by the voltage at which COP pin voltage becomes

“High”, which is a voltage equal to VDD × 0.9 V or higher, when the voltage V1 is gradually increased

from the starting condition V1 = 3.5 V. The overcharge release voltage VCL1 is defined by the voltage

at which COP pin voltage becomes “Low” when the voltage V1 is gradually decreased. The

hysteresis voltage of the overcharge detection VHC1 is then defined by the difference between the

overcharge detection voltage VCU1 and the overcharge release voltage VCL1.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 13

The overdischarge detection voltage VDL1 is defined by the voltage at which DOP pin voltage

becomes “High” when the voltage V1 is gradually decreased from the starting condition V1 = 3.5 V.

The overdischarge release voltage VDU1 is defined by the voltage at which DOP pin voltage becomes

“Low” when the voltage V1 is gradually increased. The hysteresis of the overdischarge detection

voltage VHD1 is then defined by the difference between the overdischarge release voltage VDU1 and

the overdischarge detection voltage VDL1.

Other overcharge detection voltage VCUn, hysteresis voltage of overcharge detection VHCn,

overdischarge detection voltage VDLn, and hysteresis of the overdischarge detection voltage VHDn

( for n = 2 to 4) are defined in the same manner as in the case for n = 1.

〈〈Overcurrent detection voltages〉〉

Starting condition is V1 = V2 = V3 = V4 = 3.5 V, VMP = VDD, and the CDT pin is open. The DOP pin

voltage thus provides “Low”

The overcurrent detection voltage 1, VIOV1 is defined by the voltage difference VDD − VMP at which the

DOP pin voltage becomes “High” when the voltage of VMP pin is decreased.

Starting condition for measuring the overcurrent detection voltage 2 and 3 is V1 = V2 = V3 = V4 = 3.5

V, VMP = VDD and the CDT pin voltage VCDT = VSS . The DOP pin voltage thus provides “Low”.

The overcurrent detection voltage 2, VIOV2 is defined by the voltage difference VDD−VMP at which the

DOP pin voltage becomes “High” when the voltage of VMP pin is decreased.

The overcurrent detection delay time 2, tIOV2 is a time needed for the DOP pin to become “High” from

“Low” when the VM pin voltage is changed quickly to VIOV2 min.−0.2 V from the starting condition VMP

= VDD.

The overcurrent detection voltage 3, VIOV3 is defined by the voltage of the VM pin at which the DOP

pin voltage becomes “High” when the voltage of VMP pin is decreased at the speed 10 V / ms.

The overcurrent detection delay time 3, tIOV3 is a time needed for the DOP pin to become “High” from

“Low” when the VM pin voltage is changed quickly to VIOV3 min.−0.2 V from the starting condition VMP

= VDD.

5. CTL1 pin current, overcharge detection delay, overdischarge detection delay, and overcurrent

detection delay 1 (Test circuit 5)

Starting condition is V1 = V2 = V3 = V4 = 3.5 V and VMP = VDD.

Current that flows between the CTL1 pin and VSS is the CTL1 pin current ICTL1L.

The overcharge detection delay time tCU is a time needed for the COP pin voltage to change from “Low” to

“High” just after the V1 voltage is rapidly increased from 3.5 V to 4.5 V.

The overdischarge detection delay time tDL is a time needed for the DOP pin voltage to change from

“Low” to “High” just after the V1 voltage is rapidly decreased from 3.5 V to 1.5 V.

The overcurrent detection delay time 1 is a time needed for the DOP pin voltage to change from “Low” to

“High” just after the VMP pin voltage is decreased from VDD to VDD−0.35 V when V1 = 3.5 V.

6. Input voltages for CTL1 and CTL2 (Test circuit 6)

Starting condition is V1 = V2 = V3 = V4 = 3.5 V.

Pin voltages of the COP and the DOP should be “High” when VCTL1 = VCTL1H min. and CTL2 is OPEN.

Pin voltages of the COP and the DOP should be “Low” when VCTL1 = VCTL1L max. and CTL2 is OPEN.

Pin voltage of the COP is “High” and the pin voltage of the DOP is “Low” when VCTL1 = VCTL1L max. and

VCTL2 = VCTL2H min.

Pin voltage of the COP is “Low” and the pin voltage of the DOP is “High” when VCTL1 = VCTL1L max. and

VCTL2 = VCTL2L max.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

7. 0 V battery charge starting charger voltage and 0 V battery charge inhibition battery voltage (Test

circuit 7)

One of the 0 V battery charge starting charger voltage and 0 V battery charge inhibition battery voltage is

applied to each product according to the 0V battery charging function.

Starting condition is V1 = V2 = V3 = V4 = 0 V for a product in which 0 V battery charging is available.

The COP pin voltage should be lower than V0CHA max.−1 V when the VMP pin voltage VMP = V0CHA max.

Starting condition is V1 = V2 = V3 = V4 = V0INH for a product in which 0 V battery charging is inhibited.

The COP pin voltage should be higher than VMP−1 V when the VMP pin voltage VMP = 24 V.

8. Internal resistance (Test circuit 8)

The resistance between VDD and VMP is RVDM and is calculated by the equation RVDM = VDD / IVDM where

IVDM is a VMP pin current after VMP is changed to VSS from the starting condition V1 = V2 = V3 = V4 = 3.5 V

and VMP = VDD.

The resistance between VSS and VMP is RVSM and is calculated by the equation RVSM = VDD / IVSM where

IVSM is a VMP pin current at the condition V1 = V2 = V3 = V4 = 1.8 V and VMP = VDD.

9. Pin current for CTL2 to CTL4, COP, DOP, VBATOUT (Test circuit 9)

Starting condition is V1 = V2 = V3 = V4 = 3.5 V.

Pin current for CTL2 at “High” is ICTL2H and is obtained by setting VCTL2 = VOUT.

Pin current for CTL2 at “Low” is ICTL2L and is obtained by setting VCTL2 = VSS.

Pin current for CTL3 and CTL4 can be obtained in the same manner as in the CTL2.

Pin current for COP at “High” is ICOH and is obtained by setting V1 = V2 = V3 = V4 = 6 V, VMP = VDD, and

VCOP = VDD. And pin current for COP at “Low” is ICOL and is obtained by setting V1 = V2 = V3 = V4 = 3.5 V,

VMP = VDD, and VCOP = 0.5 V.

Pin current for DOP at “Low” is IDOL and is obtained by setting V1 = V2 = V3 = V4 = 3.5 V, VMP = VDD, and

VDOP = 0.5 V. And pin current for COP at “High” is ICOH and is obtained by setting V1 = V2 = V3 =V4 = 3.5

V, VMP = VDD−1 V, and VDOP = VDD−0.5 V.

Pin current for VBATOUT at “High” is IVBATH and is obtained by setting CTL3 and CTL4 are open and

VBATOUT = VOFF3−0.5 V. And pin current for VBATOUT at “Low” is IVBATL and is obtained by setting VBATOUT

= VOFF3+0.5 V.

C1=1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

C1=1 μF IOUT

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

Test circuit 1 Test circuit 2

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 15

C1=1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

R1=1 MΩ

C1=1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

Test circuit 3 Test circuit 4

C2=0.1 μF

C1=1 μF C3=0.1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

C1=1 μF

R1=1 MΩ

V8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

Test circuit 5 Test circuit 6

R1=1 MΩ

C1=1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

C1=1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

Test circuit 7 Test circuit 8

C1=1 μF

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

VREG 16

CDT 9

CCT 10

CTL4 12

CTL2 14

CTL1 15

CTL3 13

Test circuit 9

Figure 5

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

 Operation

1. Battery protection circuit

Battery protection protects batteries from overcharge and overdischarge, and also protects external

FETs from overcurrent.

1-1 Normal condition

When all of the battery voltages are in the range from VDLn to VCUn and the discharge current is lower

than a specified value (the VMP pin voltage is lower than VIOV1), the charging and discharging FETs

are turned on.

1-2 Overcharge condition

When any one of the battery voltages becomes higher than VCUn and the state continues for tCU or

longer, the COP pin becomes high impedance and is pulled up to EB+ pin voltage by an external

resistor, and the charging FET is turned off to stop charging. The overcharge condition is released

when one of the following two conditions holds.

a) All battery voltages become lower than VCUn + VHCn.

b) VDD−VMP>VIOV1 (A load is connected, and discharging starts.)

1-3 Overdischarge condition

When any one of the battery voltages becomes lower than VDLn and the state continues for tDL or

longer, the DOP pin voltage becomes VDD level, and the discharging FET is turned off to stop

discharging. After discharging is stopped due to overdischarge condition, the S-8243 enters power

down condition.

1-4 Power down condition

After stopping discharging due to overdischarge condition, the S-8243 enters power down condition.

In this condition, almost all circuits of the S-8243 are stopped to save current consumption. The

current consumption becomes lower than IPDN. In the power down condition, the VMP pin is pulled

down to VSS level by the internal RVSM resistor. In power down condition, output pin voltages are fixed

at the following levels.

a) COP VSS (Charging FET is turned on)

b) DOP VDD (Discharging FET is turned off)

c) VREG VSS (Voltage regulator circuit is off)

d) VBATOUT VSS (Battery voltage monitor amp circuit is off)

The power down condition is released when the following condition holds.

a) VMP>VIOV3 (A charger is connected, and charging starts.)

The overdischarging status is released when the following condition holds.

a) All of the battery voltages are VDLn or higher, and the VMP pin voltage is VDD/2 or higher. (A

charger is connected.)

1-5 Overcurrent condition

The S-8243 has three overcurrent detection levels (VIOV1, VIOV2 and VIOV3) and three overcurrent

detection delay times (tIOV1, tIOV2 and tIOV3) corresponding to each overcurrent detection levels. When

the discharging current becomes higher than a specified value (the voltage between VDD and VMP is

greater than VIOV1) and the state continues for tIOV1 or longer, the S-8243 enters the overcurrent

condition in which the DOP pin voltage becomes VDD level to turn off the discharging FET to stop

discharging, the COP pin becomes high impedance and is pulled up to EB+ pin voltage by an

external resistor to turn off the charging FET to stop charging, and the VMP pin is pulled up to VDD

voltage by the internal resistor RVDM. Operation of two other overcurrent detection levels (VIOV2 and

VIOV3) and overcurrent detection delay times (tIOV2 and tIOV3) is the same as that for VIOV1 and tIOV1.

The overcurrent condition is released when the following condition holds.

a) VMP>{VIOV3 / (1−VIOV3) × 3 / 5−2 / 5} × RVDM

(A load is released, and the impedance between the EB− and EB+ pin becomes higher.)

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 17

1-6 0 V battery charging function

Regarding the charging of a self-discharged battery (0 V battery) the S-8243 has two functions from

which one should be selected.

a) 0 V battery charging is allowed (0 V battery charging is available)

When a charger voltage is higher than V0CHA, 0 V battery can be charged.

b) 0 V battery charging is forbidden (0 V battery charging is impossible)

When one of the battery voltages is lower than V0INH, 0 V battery can not be charged.

Caution When the VDD pin voltage is lower than minimum of VDSOP, the operation of S-8243

series is not guaranteed.

1-7 Delay time setting

Overcharge detection delay times (tCU1 to tCU4) are determined by the external capacitor at the CCT

pin. Overdischarge detection delay times (tDL1 to tDL4) and overcurrent detection delay time 1 (tIOV1)

are determined by the external capacitor at CDT pin. Overcurrent detection delay time 2,3 (tIOV2,

tIOV3) are fixed internally.

S-8243AAC, AAD, BAE, BAF min. typ. max.

tCU [s] = Delay factor ( 5 10 15 )×CCT [μF]

tDL [ms] = Delay factor ( 500 1000 1500 )×CDT [μF]

tIOV1 [ms] = Delay factor ( 50 100 150 )×CDT [μF]

S-8243BAD min. typ. max.

tCU [s] = Delay factor ( 5 10 15 )×CCT [μF]

tDL [ms] = Delay factor ( 555 1110 2220 )×CDT [μF]

tIOV1 [ms] = Delay factor ( 33.1 66.2 132 )×CDT [μF]

2. Voltage regulator circuit

Built-in voltage regulator can be used to drive a micro computer, etc. The voltage regulator supplies

voltage of 3.3 V (3 mA maximum) and an external capacitor is needed.

Caution In the power down condition the voltage regulator output is pulled down to the VSS level

by an internal resistor.

3. Battery monitor amp circuit

Battery monitor amp sends information of the batteries to a microcomputer. The battery monitor amp

output is controlled and selected by CTL3 and CTL4 pins to give the following two voltages.

a) VBATn = GAMPn × VBATTERYn + VOFFn where GAMPn is the n-th voltage gain of the amp, V BATTERYn is

the n-th battery voltage, and VOFFn is the n-th offset voltage of the amp.

b) N-th offset voltage VOFFn

Each battery voltage VBATTERYn (n = 1 to 4) is thus calculated by following equation.

VBATTERYn = {(VBATn − VOFFn} / GAMPn (n=1,2,3,4)

After the state of CTL3 and CTL4 are changed, a time between 25 μs and 250 μs is needed for the battery

monitor amp to become stable.

Caution In the power down condition the battery monitor amp output is the VSS level.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

4. CTL pins

The S-8243 has four control pins. The CTL1 and CTL2 pins are used to control the COP and DOP pin

output voltages. CTL1 takes precedence over CTL2. CTL2 takes precedence over the battery protection

circuit. The CTL3 and CTL4 pins are used to control the VBATOUT pin output voltage.

Table 9 CTL1 and CTL2 Mode

Input Output

CTL1 pin CTL2 pin External discharging FET External charging FET

High High OFF OFF

High Open OFF OFF

High Low OFF OFF

Open High OFF OFF

Open Open OFF OFF

Open Low OFF OFF

Low High Normal*1 OFF*2

Low Open Normal*1 Normal*1

Low Low OFF Normal*1

*1. States are controlled by voltage detection circuit.

*2. Off state is brought after the overcharge detection delay time tCU.

Table 10 CTL3 and CTL4 Mode

Input Output

CTL3 pin CTL4 pin VBATOUT (A series) VBATOUT (B series)

High High V1 Offset V1 Offset

High Open V1×0.2 + V1 Offset V1×0.2 + V1 Offset

High Low Don’t use. V2 Offset

Open High Don’t use. V2×0.2 + V2 Offset

Open*1 Open*1 V2 Offset V3 Offset

Open Low V2×0.2 + V2 Offset V3×0.2 + V3 Offset

Low High V3 Offset V4 Offset

Low Open V3×0.2 + V3 Offset V4×0.2 + V4 Offset

Low Low Don’t use. Don’t use.

*1. CTL3 and CTL4 pins should be open when a microcomputer is not used.

Caution Please note unexpected behavior might occur when electrical potential difference

between the CTL pin (“L” level) and VSS is generated through the external filter (RVSS

and CVSS) as a result of input voltage fluctuations.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 19

 Timing Charts

1. Overcharge detection, Over discharge detection

(n= 1~4)

VCUn

VDUn

VDLn

VCLn

Battery voltage

Hi-Z

VDD

VSS

COP pin voltage

VIOV1

VSS

VMP pin volt age

VDD

DOP pin volt age

VSS

Charger connec t ed

Load connected

Mode

Overcharge det ec tion

delay ti me (t

) Overdischarge detection

delay ti me (t

)

<1> <2> <1> <3> <1>

VBAT

VSS

VBATOUT pin

volta

VOUT

VSS

VREG pin votage

VDD

Hi-Z

*1. State depends on CTL3 and CTL4 input levels. Refer to Figure 9.

*2. <1>: Normal mode, <2>: Overcharge mode, <3>: Overdischarge mode

Remark The charger is assumed to charge with a constant current. VEB+ indicates the open voltage of the

charger.

Figure 6

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

2. Overcurrent detection

VCU

VDU

VDL

VCL

Battery

voltage

VHC

VHD

VDD

DOP pin

voltage

VSS

Hi-Z

VSS

COP pin

voltage Hi-Z Hi-Z

VDD

VSS

VMP pin

voltage

VIOV3

VIOV2

VIOV1

Load connect ed

VRETURN

VOUT

VSS

VBATOUT

pin voltage

VDD

VSS

VREG pin

voltage

VOUT

VBAT

<1> <2> <1> <1> <2> <1>

<2>

Mode

Charger connec t ed

Overcurrent detection

delay time 1 ( t

IOV1

) Overcurrent detection

delay time 3 ( t

IOV3

)

Overcurrent detection

delay time 2 ( t

IOV2

)

*1. VRETURN = VDD / 6 (typ.)

*2. State depends on CTL3 and CTL4 input levels. Refer to Figure 9.

*3. <1>: Normal mode, <2>: Overcurrent mode

Remark The charger is assumed to charge with a constant current. VEB+ indicates the open voltage of the

charger.

Figure 7

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 21

3. CTL1, CTL2 pin voltage

VDD

COP pin

Volta

VSS

VOUT

VSS

VBATOUT

pin Voltage

VDD

VSS

VREG pin

Volta

VOUT

VBAT

VDD

DOP pin

Volta

VSS

Normal

Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Normal

Normal

VDD

VSS

CTL1 pin

Volta

VOUT

OPEN

VDD

VSS

VOUT

OPEN

CTL2 pin

Volta

*1. State depends on each battery voltage and the VMP pin voltage.

*2. State depends on CTL3 and CTL4 input levels. Refer to Figure 8.

Figure 8

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

4. CTL3, TL4 pin voltage

VOFF

COP pin

voltage

VSS

VOUT

VSS

VDD

VSS

VREG pin

voltage

VOUT

VBAT

VDD

DOP pin

voltage

VSS

(1) (1)

(1)

(1) (1) (1) (1) (1) (1) (1) (1) (1)

VDD

VSS

CTL3 pin

voltage

VOUT

OPEN

VDD

VSS

VOUT

OPEN

C T L 4 pin

voltage

VOUT

VSS

S-8243A

(3-serial cell)

VBATOUT

pin voltage

VBAT

S-8243B

(4-serial cell)

VBATOUT

pin voltage

(1)

VOFF

V1 offset

0.2 V2 offset V2

0.2

V2 offset

V3 offset

0.2

V3 offs et

V1 offset

0.2 V2 offset

0.2

V2 offset V3 offset V4

0.2

Don’t

use Don’t

use

Don’t

use

Don’t

use

V3 offset V4 offset

V4 offset

(1)

*1. State depends on CTL1 and CTL2 and each battery voltage and the VMP pin voltage. Refer to

Figure 6 to 8.

Figure 9

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 23

 Battery Protection IC Connection Example

1. S-8243A Series

RVSS

CTL1

RVMP

RDOP

EB-

EB+

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

CTL4 12

VREG 16

CCT 10

CTL2 14

CTL1 15

CTL3 13

CDT 9

CVC3

CVC2

S-8243A

CVSS

RVC3

RVC2

Microcomputer

CCDT

CCCT

CVREG

RVBAT

RCTL4

RCTL3

RCTL2

RCTL1

Charging FET Discharging FET

RCOP

Figure 10

Table 11 Constants for External Components

No. Part Typ. Range Unit

1 RVC2 1 0.51 to 1*1 kΩ

2 RVC3 1 0.51 to 1*1 kΩ

3 RVSS 10 2.2 to 10*1 Ω

4 RDOP 5.1 2 to 10 kΩ

5 RCOP 1 0.1 to 1

MΩ

6 RVMP 5.1 1 to 10 kΩ

7 RCTL1 1 1 to 100

kΩ

8 RCTL2 1 1 to 10 kΩ

9 RCTL3 1 1 to 10 kΩ

10 RCTL4 1 1 to 10 kΩ

11 RVBAT 0 0 to 100

kΩ

12 CVC2 0.047 0.047 to 0.22*1 μF

13 CVC3 0.047 0.047 to 0.22*1 μF

14 CVSS 4.7 2.2 to 10*1 μF

15 CCCT 0.1 More than 0.01

μF

16 CCDT 0.1 More than 0.02

μF

17 CVREG 4.7 0.68 to 10

μF

*1. Please set up a filter constant to be RVSS × CVSS ≥ 22 μF • Ω and to be

RVC2 × CVC2 = RVC3 × CVC3 = RVSS × CVSS.

Caution1. No resista nce should be inserted in the power supply pin VDD.

2. The above constants are s ubject to change without prior notice.

3. It has not been confirmed whether the operation is normal or not in circuits other than the above example of

connection. In addition, the example of connection shown above and the constant will not guarantee successful

operation. Perform thorough evaluation using the actual application to set the constant.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

2. S-8243B Series

RVSS

CTL1

Charging FET

Discharging FET

RVMP

RDOP

EB-

EB+

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

CTL4 12

VREG 16

CCT 10

CTL2 14

CTL1 15

CTL3 13

CDT 9

CVC3

CVC2

CVC1 S-8243B

CVSS

RVC3

RVC2

Microcomputer

CCDT

CCCT

CVREG

RVBAT

RCTL4

RCTL3

RCTL2

RCTL1

RVC1

RCOP

Figure 11

Table 12 Constants for External Components

No. Part Typ. Range Unit

1 RVC1 1 0.51 to 1*1 kΩ

2 RVC2 1 0.51 to 1*1 kΩ

3 RVC3 1 0.51 to 1*1 kΩ

4 RVSS 10 2.2 to 10*1 Ω

5 RDOP 5.1 2 to 10 kΩ

6 RCOP 1 0.1 to 1

MΩ

7 RVMP 5.1 1 to 10 kΩ

8 RCTL1 1 1 to 100 kΩ

9 RCTL2 1 1 to 10 kΩ

10 RCTL3 1 1 to 10 kΩ

11 RCTL4 1 1 to 10 kΩ

12 RVBAT 0 0 to 100 kΩ

13 CVC1 0.047 0.047 to 0.22*1 μF

14 CVC2 0.047 0.047 to 0.22*1 μF

15 CVC3 0.047 0.047 to 0.22*1 μF

16 CVSS 4.7 2.2 to 10*1 μF

17 CCCT 0.1 More than 0.01 μF

18 CCDT 0.1 More than 0.02

μF

19 CVREG 4.7 0.68 to 10 μF

*1. Please set up a filter constant to be RVSS × CVSS ≥ 22 μF • Ω and to be

RVC1 × CVC1 = RVC2 × CVC2 = RVC3 × CVC3 = RVSS × CVSS.

Caution1. No resista nce should be inserted in the power supply pin VDD.

2. The above constants are s ubject to change without prior notice.

3. It has not been confirmed whether the operation is normal or not in circuits other than the above example of

connection. In addition, the example of connection shown above and the constant will not guarantee successful

operation. Perform thorough evaluation using the actual application to set the constant.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 25

 Precautions

• Pay attention to the operating conditions for input/output voltage and load current so that the power loss in

the IC does not exceed the package power dissipation.

• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in

electrostatic protection circuit.

• Seiko Instruments Inc. shall not be responsible for any patent infringement by products including the S-8243

series, the method of using the S-8243 series in such products, the product specifications or the country of

destination thereof.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

 The Example of Application Circuit

1. S-8243A Series

CTL1

−

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

CTL4 12

VREG 16

CCT 10

CTL2 14

CTL1 15

CTL3 13

CDT 9

S-8243A

VREG

SMBus

VREG

LED1

LED2

LED3

LED4

LED5

DISP

VOUT

ESCL

ESCD

SMBC

SMBD

HDQ

SR2

SR1

SRCVSS

RB1

THON

VCELL1

CTL4

CTL3

CTL2

REG

VCC

Bq2063

S-24C

GND

SDA

SCL

VCC

Figure 12

2. S-8243B Series

CTL1

EB+

8 VSS

7 VC3

6 VC2

5 VC1

3 COP

2 DOP

4 VMP

1 VDD

VBATOUT 11

CTL4 12

VREG 16

CCT 10

CTL2 14

CTL1 15

CTL3 13

CDT 9

S-8243B

VREG

SMBus

VREG

LED1

LED2

LED3

LED4

LED5

DISP

VOUT

ESCL

ESCD

SMBC

SMBD

HDQ

SR2

SR1

SRCVSS

RB1

THON

VCELL1

CTL4

CTL3

CTL2

REG

VCC

Bq2063

S-24C

GND

SDA

SCL

VCC

Figure 13

Caution The above connection example will not guarantee successful operation. Perform thorough evaluation

using the actual application.

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 27

 Characteristics (Typical Data)

1. Current consumption

100

120

0 4 8 12 16 20 24

DD (V)

OPE

(

S-8243BAF IOPE - V

100

120

-40 -20 0 20 40 60 80

Ta (°C)

OPE

(

S-8243BAF IOPE- Temp

0.00

0.02

0.04

0.06

0.08

0.10

0 4 8 12 16 20 24

DD (V)

PDN

(

S-8243BAF I

PDN

- V

0.00

0.02

0.04

0.06

0.08

0.10

-40 -20 0 20 40 60 80

Ta (°C)

PDN

(

S-8243BAF I

PDN - Temp

2. Overcharge detection/release voltage, overdischarge detection/release voltage, ov ercurrent

detection voltages, and delay times

4.225

4.230

4.235

4.240

4.245

4.250

4.255

4.260

4.265

4.270

4.275

-40 -20 0 20 40 60 80

(°C)

(V)

S-8243BAF V

CU - Temp

3.95

3.97

3.99

4.01

4.03

4.05

-40 -20 0 20 40 60 80

Ta (°C)

(V)

S-8243BAF V

CL - Temp

2.300

2.325

2.350

2.375

2.400

2.425

2.450

2.475

2.500

-40 -20 0 20 40 60 80

Ta (°C)

(V)

S-8243BAF V

DU - Temp

2.32

2.34

2.36

2.38

2.40

2.42

2.44

2.46

2.48

-40 -20 0 20 40 60 80

Ta (°C)

(V)

S-8243BAF V

DL - Temp

0.175

0.180

0.185

0.190

0.195

0.200

0.205

0.210

0.215

0.220

0.225

10 12 14 16

(V)

IOV1

(V)

S-8243BAF V

IOV1 - V

0.175

0.180

0.185

0.190

0.195

0.200

0.205

0.210

0.215

0.220

0.225

-40 -20 0 20 40 60 80

Ta (°C)

IOV1

(V)

S-8243BAF V

IOV1 - Temp

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

-0.60

-0.55

-0.50

-0.45

-0.40

10 12 14 16

VDD (V)

VIOV2(V)

S-8243BAF VIOV2- VDD

Reference

-0.60

-0.55

-0.50

-0.45

-0.40

-40-20020406080

Ta (°C)

VIOV2(V)

S-8243BAF VIOV2- Temp

VDD Reference

0.425

0.450

0.475

0.500

0.525

0.550

0.575

10 12 14 16

VDD (V)

VIOV3 /VDD(−)

S-8243BAF VIOV3- VDD

0.425

0.450

0.475

0.500

0.525

0.550

0.575

-40 -20 0 20 40 60 80

Ta (°C )

VIOV3/VDD(−)

S-8243BAF VIOV3- Temp

0 0.2 0.4 0.6 0.8 1

CCT (μF)

tCU (s)

S-8243BAF tCU - CCT

0.0

0.5

1.0

1.5

2.0

2.5

-40-20 0 20406080

Ta (°C)

tCU (s)

S-8243BAF tCU - Temp

CCT=0.1μF

500

1000

1500

0 0.2 0.4 0.6 0.8 1

CDT (μF)

tDL (ms)

S-8243BAF tDL - CDT

100

150

200

250

-40-200 20406080

Ta (°C)

tDL (V)

S-8243BAF tDL- Temp

CDT=0.1μF

100

150

0 0.2 0.4 0.6 0.8 1

CDT (μF)

tIOV1(ms)

S-8243BAF tIOV1- CDT

-40 -20 0 20 40 60 80

Ta (°C)

IOV1

(ms)

S-8243BAF t

IOV1

- Temp

=0.1

1.5

2.0

2.5

3.0

3.5

4.0

-40 -20 0 20 40 60 80

Ta (°C)

IOV2

(ms)

S-8243BAF t

IOV2 -Temp

100

200

300

400

500

600

-40 -20 0 20 40 60 80

Ta (°C)

IOV3

(

S-8243BAF t

IOV3 -T emp

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00 S-8243A/B Series

Seiko Instruments Inc. 29

3. COP/DOP pin current

0.00

0.02

0.04

0.06

0.08

0.10

0 4 8 12 16 20 24

COP

(V)

COH

(

μA

)

S-8243BAF I

COH - V

COP

0 3.5 7 10.5 14

COP

(V)

COL

(m A

)

S-8243BAF I

COL - V

COP

-5

-4

-3

-2

-1

0 1.8 3.6 5.4 7.2

DOP

(V)

DOH

(m A

)

S-8243BAF I

DOH

- V

DOP

0 3.5 7 10.5 14

DOP

(V)

DOL

(m A

)

S-8243BAF I

DOL - V

DOP

4. Voltage regulator

3.0

3.1

3.2

3.3

3.4

3.5

3.6

-40 -20 0 20 40 60 80

Ta (°C)

OUT

(V)

S-8243BAF V

OUT - Temp

2.3

2.8

3.3

3.8

0 4 8 12 16 20 24

(V)

OUT

(V)

S-8243BAF V

OUT - V

→

24V, Ta=25°C

IOUT = 5μA

100μA

3mA

10mA

0.0

1.0

2.0

3.0

4.0

0 20 40 60 80 100

OUT

(mA)

OUT

(V)

S-8243BAF V

OUT - I

OUT

V1=V2=V3=V4=VBAT

=6V 14V

18V 10V

0.0

1.0

2.0

3.0

4.0

0 20406080100

IOUT (mA)

VOUT (V)

S-8243BAF VOUT - IOUT

85°C

Ta=-40°C

25°C

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series Rev.2.4_00

Seiko Instruments Inc.

5. Battery monitor amp

150

155

160

165

170

175

180

12345

VBAT(V)

VOFF (mV)

S-8243BAF VOFF - VBAT

V1=V2=V3=V4=VBAT

VOFF1

VOFF2

VOFF3 VOFF4

150

155

160

165

170

175

180

-40-200 20406080

Ta (°C)

VOFF (mV)

S-8243BAF VOFF - Temp

VOFF1

VOFF2

VOFF3 VOFF4

0.198

0.199

0.200

0.201

0.202

12345

VBAT(V)

GAMP (−)

S-8243BAF GAMP - VBAT

V1=V2=V3=V4=VBAT

GAMP4

GAMP3

GAMP2 GAMP1

0.198

0.199

0.200

0.201

0.202

-40-20 0 20 40 60 80

(°C)

GAMP (−)

S-8243BAF GAMP

- Temp

GAMP1

GAMP2

GAMP3 GAMP4

0.17±0.05

5.1±0.2

0.22±0.08

0.65

No.

TITLE

SCALE

UNIT mm

Seiko Instruments Inc.

No. FT016-A-P-SD-1.1

FT016-A-P-SD-1.1

TSSOP16-A-PKG Dimensions

4.0±0.1

2.0±0.1

ø1.5+0.1

-0

ø1.6±0.1

8.0±0.1

4.2±0.2

6.5 +0.4

-0.2

0.3±0.05

1.5±0.1

(7.2)

No.

TITLE

SCALE

UNIT mm

Seiko Instruments Inc.

No. FT016-A-C-SD-1.1

FT016-A-C-SD-1.1

TSSOP16-A-Carrier Tape

Feed direction

No.

TITLE

SCALE

UNIT mm

17.4±1.0

21.4±1.0

17.4 +2.0

-1.5

2.0±0.5

ø13.0±0.2

ø21±0.8

Seiko Instruments Inc.

No. FT016-A-R-SD-1.1

FT016-A-R-SD-1.1

TSSOP16-A- Reel

Enlarged drawing in the central part

QTY. 2,000

•

The information described herein is subject to change without notice.

• Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein

whose related industrial properties, patents, or other rights belong to third parties. The application circuit

examples explain typical applications of the products, and do not guarantee the success of any specific

mass-production design.

• When the products described herein are regulated products subject to the Wassenaar Arrangement or other

agreements, they may not be exported without authorization from the appropriate governmental authority.

• Use of the information described herein for other purposes and/or reproduction or copying without the

express permission of Seiko Instruments Inc. is strictly prohibited.

• The products described herein cannot be used as part of any device or equipment affecting the human

body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus

installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc.

• Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the

failure or malfunction of semiconductor products may occur. The user of these products should therefore

give thorough consideration to safety design, including redundancy, fire-prevention measures, and

malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.