MCP73213-A6SI/MF - MICROCHIP

MCP73213

Features

• Complete Linear Charge Management Controller:

- Integrated Input Overvoltage Protection

- Integrated Pass Transistor

- Integrated Current Sense

- Integrated Reverse Discharge Protection

• Constant Current / Constant Voltage Operation

with Thermal Regulation

• 4.15V Undervoltage Lockout (UVLO)

• 13V Input Overvoltage Protection

• High Accuracy Preset Voltage Regulation

Through Full Temperature Range (-5°C to +55°C):

0.6%

• Battery Charge Voltage Options:

- 8.20V, 8.40V, 8.7V or 8.8V

• Resistor Programmable Fast Charge Current:

- 130 mA - 1100 mA

• Preconditioning of Deeply Depleted Cells:

- Available Options: 10% or Disable

• Integrated Precondition Timer:

- 32 Minutes or Disable

• Automatic End-of-Charge Control:

- Selectable Minimum Current Ratio:

5%, 7.5%, 10% or 20%

- Elapse Safety Timer: 4 HR, 6 HR, 8 HR or

Disable

• Automatic Recharge:

- Available Options: 95% or Disable

• Factory Preset Charge Status Output:

- On/Off or Flashing

• Soft Start

• Temperature Range: -40°C to +85°C

• Packaging: DFN-10 (3 mm x 3 mm)

Applications

• Digital Camcorders

• Portable Media Players

• Ultra Mobile Personal Computers

• Netbook Computers

• Handheld Devices

• Walkie-Talkie

• Low-Cost 2-Cell Li-Ion/Li-Poly Chargers / Cradles

Description

The MCP73213 is a highly integrated Li-Ion battery

charge management controller for use in space-limited

and cost-sensitive applications. The MCP73213

provides specific charge algorithms for dual-cell Li-Ion

/ Li-Polymer batteries to achieve optimal capacity and

safety in the shortest charging time possible. Along

with its small physical size, the low nu mb er of extern al

components makes the MCP73 213 ideally suitable for

portable applications. The absolu te maximum voltage,

up to 18V, allows the use of MCP73213 in harsh

environments, such as low cost wall wart or voltage

spikes from plug/unplug.

The MCP73213 employs a constant current / constant

voltage charge algorithm. The various charging voltage

regulations provide design engineers flexibility to use in

different applications. The fast charge, constant current

value is set with one external resistor from 130 mA to

1100 mA. The MCP73213 limits the charge current

based on die temperature during high power or high

ambient conditions. This thermal regulation optimizes

the charge cycle time while maintaining device

reliability.

The PROG pin of the MCP73213 also serves as enable

pin. When high impedance is applied, the MCP73213

will be in standby mode.

The MCP73213 is fully specified over the ambient

temperature range of -40°C to +85°C. T he MCP73213

is available in a 10 lead, DFN package.

Package Types (Top View)

MCP73213

3x3 DFN *

VBAT

VDD

VBAT

VSS

7STAT

PROGVDD

* Includes Exposed Thermal Pad (EP); see Table 3-1.

NC 56NC

Dual-Cell Li-Ion / Li-Polymer Battery Charge Management

Controller with Input Overvoltage Protection

MCP73213

Typical Application

TABLE 1: AVAILABLE FACTORY PRESET OPTIONS

TABLE 2: STANDARD SAMPLE OPTIONS

Charge

Voltage OVP

Pre-

conditioning

Charge Current

Pre-

conditioning

Threshold

Precondition

Timer

Elapse

Timer

End-of-

Charge

Control

Automatic

Recharge

Output

Status

8.2V 13V Disable / 10% 66.5% / 71.5% Disable /

32 Minimum Disable / 4 HR /

6 HR / 8 HR 5% / 7.5% /

10% / 20% No /

Yes Type 1 /

Type 2

8.4V 13V Disable / 10% 66.5% / 71.5% Disable /

32 Minimum Disable / 4 HR /

6 HR / 8 HR 5% / 7.5% /

10% / 20% No /

Yes Type 1 /

Type 2

8.7V 13V Disable / 10% 66.5% / 71.5% Disable /

32 Minimum Disable / 4 HR /

6 HR / 8 HR 5% / 7.5% /

10% / 20% No /

Yes Type 1 /

Type 2

8.8V 13V Disable / 10% 66.5% / 71.5% Disable /

32 Minimum Disable / 4 HR /

6 HR / 8 HR 5% / 7.5% /

10% / 20% No /

Yes Type 1 /

Type 2

Note 1: IREG: Regulated fast charge current.

2: VREG: Regulated charge voltage.

3: IPREG/IREG: Preconditioning charge current; ratio of regulated fast charge current.

4: ITERM/IREG: End-of-Charge control; ratio of regulated fast charge current.

5: VRTH/VREG: Recharge threshold; ratio of regulated battery voltage.

6: VPTH/VREG: Preconditioning threshold voltage.

Part

Number

VREG OVP IPREG/IREG Pre-charge

Timer

Elapse

Timer

ITERM/IREG VRTH/VREG VPTH/VREG Output

Status

MCP73213-B6S/MF 8.20V 13V 10% 32 Min. 6 HR 10% 95% 71.5% Type 1

MCP73213-A6S/MF 8.40V 13V 10% 32 Min. 6 HR 10% 95% 71.5% Type 1

Note 1: Customers should contact their distributor, representatives or field application engineer (FAE) for support and sample.

Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of

this document. Technical support is available through the web site at: http//support.microchip.com

VDD

RPROG

CIN COUT

RLED

2-Cell

Li-Ion

Battery

MCP73213 Typical Application

VDD

STAT

VBAT

PROG

VSS

Ac-dc-Adapter

MCP73213

Functional Block Diagram

VREF (1.21V)

STAT

PROG

VBAT

VSS

DIRECTION

CONTROL

PRECONDITION

TERM

CHARGE

CURRENT

LIMIT

VOREG

VOREG UVLO

VDD

Input OverVP

VDD

13V

Thermal RegulationTSD

110°C

*Recharge VBAT

95% VREG

*Only available on selected options

VREF

CHARGE

CONTROL,

TIMER

AND

STATUS

LOGIC

REFERENCE,

BIAS, UVLO

AND SHDN

MCP73213

NOTES:

MCP73213

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

VDD................................................................................18.0V

VPROG ..............................................................................6.0V

All Inputs and Outputs w.r.t. VSS ............... -0.3 to (VDD+0.3)V

Maximum Junction Temperature, TJ............Internally Limited

Storage temperature .....................................-65°C to +150°C

ESD protection on all pins

Human Body Model (1.5 kΩ in Series with 100 pF).......≥ 4kV

Machine Model (200 pF, No Series Resistance).............300V

† Notice: Stresses above those listed under “Maximum

Ratings” may cause permanent damage to the device. This is

a stress rating only and functional operation of the device at

those or any other conditions above those indicated in the

operational listings of this specification is not implied.

Exposure to maximum rating conditions for extended per iods

may affect device reliability.

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [VREG(Typical) + 0.3V] to 12V,

TA = -40°C to +85°C. Typical values are at +25°C, VDD = [VREG (Typical) + 1.0V]

Parameters Sym Min Typ Max Units Conditions

Supply Input

Input Voltage Range VDD 4—16V

Operating Supply Voltage VDD 4.2 — 13 V

Supply Current ISS — 4 5.5 µA Shutdown (VDD < VBAT - 150 mV)

— 700 1500 µA Charging

— 50 125 µA Standby (PROG Floating)

— 50 150 µA Charge Complete; No Battery;

VDD < VSTOP

Battery Discharge Current

Output Reverse Leakage

Current IDISCHARGE — 0.5 2 µA Standby (PROG Floating)

— 0.5 2 µA Shutdown (VDD < VBAT,

or VDD < VSTOP)

10 17 µA Charge Complete; VDD is present

Undervoltage Lockout

UVLO Start Threshold VSTART 4.10 4.15 4.25 V

UVLO Stop Threshold VSTOP 4.00 4.05 4.10 V

UVLO Hysteresis VHYS — 100 — mV

Overvoltage Protection

OVP Start Threshold VOVP 12.8 13 13.2 V

OVP Hysteresis VOVPHYS — 150 — mV

Voltage Regulation (Constant Voltage Mode)

Regulated Output Voltage

Options VREG 8.15 8.20 8.25 V TA= -5°C to +55°C

8.35 8.40 8.45 V VDD = [VREG(Typical)+1V]

8.65 8.70 8.75 V IOUT = 50 mA

8.75 8.80 8.85 V

Output Voltage Tolerance VRTOL -0.6 — 0.6 %

Line Regulation |(ΔVBAT/VBAT)/

ΔVDD|— 0.05 0.20 %/V VDD = [VREG(Typical)+1V] to 12V

IOUT = 50 mA

Load Regulation |ΔVBAT/VBAT| — 0.05 0.20 % IOUT = 50 mA - 150 mA

VDD = [VREG(Typical)+1V]

Supply Ripple Attenuation PSRR — -46 — dB IOUT = 20 mA, 10 Hz to 1 kHz

—-30—dBI

OUT = 20 mA, 10 Hz to 10 kHz

Note 1: Not production tested. Ensured by design.

MCP73213

Battery Short Protection

BSP Start Threshold VSHORT —3.4—V

BSP Hysteresis VBSPHYS — 150 — mV

BSP Regulation Current ISHORT —25—mA

Current Regulation (Fast Charge, Constant-Current Mode)

Fast Charge Current

Regulation IREG 130 — 1100 mA TA = -5°C to +55°C

117 130 143 mA PROG = 10 kΩ

900 1000 1100 mA PROG = 1.1 kΩ

Preconditioning Current Regulation (Trickle Charge Constant Current Mode)

Precondition Current Ratio IPREG / IREG — 10 — % PROG = 1 kΩ to 10 kΩ

TA=-5°C to +55°C

— 100 — % No Preconditioning

Precondition Voltage

Threshold Ratio VPTH / VREG 64 66.5 69 % VBAT Low-to-High

69 71.5 74 %

Precondition Hysteresis VPHYS — 100 — mV VBAT High-to-Low (Note 1)

Charge Termination

Current Ratio ITERM / IREG 3.7 5 6.3 % PROG = 1 kΩ to 10 kΩ

TA=-5°C to +55°C

5.6 7.5 9.4

7.5 10 12.5

15 20 25

Automatic Recharge

Recharge Voltage

Threshold Ratio VRTH / VREG 93 95.0 97 % VBAT High-to-Low

No Automatic Recharge

—0—%

Pass Transistor ON-Resistance

ON-Resistance RDSON — 350 — mΩVDD = 4.5V, TJ = 105°C (Note 1)

Status Indicator - STAT

Sink Current ISINK —2035mA

Low Output Voltage VOL —0.20.5VI

SINK = 4 mA

Input Leakage Current ILK — 0.001 1 µA High Impedance, VDD on pin

PROG Input

Charge Impedance Range RPROG 1—22kΩ

Shutdown Impedance RPROG — 200 — kΩImpedance for Shutdown

Automatic Power Down

Entry Threshold VPDENTRY VBAT +

10 mV VBAT +

50 mV —VV

DD Falling

Automatic Power Down

Exit Threshold VPDEXIT —V

BAT +

150 mV VBAT +

250 mV VV

DD Rising

Thermal Shutdown

Die Temperature TSD — 150 — °C

Die Temperature

Hysteresis TSDHYS —10—°C

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [VREG(Typical) + 0.3V] to 12V,

TA = -40°C to +85°C. Typical values are at +25°C, VDD = [VREG (Typical) + 1.0V]

Parameters Sym Min Typ Max Units Conditions

Note 1: Not production tested. Ensured by design.

MCP73213

AC CHARACTERISTICS

TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise specified, all limits apply for VDD= [VREG(Typical)+0.3V] to 12V, TA=- 40°C to +85°C.

Typical values are at +25°C, VDD= [VREG(Typical)+1.0V]

Parameters Sym Min Typ Max Units Conditions

Elapsed Timer

Elapsed Timer Period tELAPSED — 0 — Hours Timer Disabled

3.6 4.0 4.4 Hours

5.4 6.0 6.6 Hours

7.2 8.0 8.8 Hours

Preconditioning Timer

Preconditioning Timer Period tPRECHG — 0 — Hours Disabled Timer

0.4 0.5 0.6 Hours

Status Indicator

Status Output turn-off tOFF ——500µsI

SINK = 1 mA to 0 mA

(Note 1)

Status Output turn-on, tON ——500 I

SINK = 0 mA to 1 mA

(Note 1)

Note 1: Not production tested. Ensured by design.

Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [VREG (Typical) + 0.3V] to 6V.

Typical values are at +25°C, VDD = [VREG (Typical) + 1.0V]

Parameters Sym Min Typ Max Units Conditions

Temperature Ranges

Specified Temperature Range TA-40 — +85 °C

Operating Temperature Range T J-40 — +125 °C

Storage Temperature Range TA-65 — +150 °C

Thermal Package Resistances

Thermal Resistance, DFN-10 (3x3) θJA — 43 — °C/W 4-Layer JC51-7 S tandard Board,

Natural Convection

MCP73213

NOTES:

MCP73213

2.0 TYPICAL PERFORMANCE CURVES

Note: Unless otherwise indicated, VDD = [VREG(Typical) + 1V], IOUT = 50 mA and TA= +25°C, Constant-voltage mode.

FIGURE 2-1: Battery Regulation Voltage

(VBAT) vs. Supply Voltage (V DD).

FIGURE 2-2: Battery Regulation Voltage

(VBAT) vs. Supply Voltage (V DD).

FIGURE 2-3: Battery Regulation Voltage

(VBAT) vs. Ambient Temperatur e (TA).

FIGURE 2-4: Battery Regulation Voltage

(VBAT) vs. Ambient Temperature (TA).

FIGURE 2-5: Charge Current (IOUT) vs.

Programming Resistor (RPROG).

FIGURE 2-6: Charge Current (IOUT) vs.

Supply Voltage (VDD).

Note: The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provide d for informational purposes only. The performance characteristics listed here in

are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified

operating range (e.g., outside specified pow er supply range) and therefore outside the warranted range.

8.16

8.17

8.18

8.19

8.20

8.21

8.22

8.23

8.24

8.4 9.0 9.6 10.2 10.8 11.4 12.0

Supply Voltage (V)

Battery Regulation Voltage (V)

VBAT = 8.2V

ILOAD = 150 mA

TA = +25°C

8.16

8.17

8.18

8.19

8.20

8.21

8.22

8.23

8.24

8.4 9.0 9.6 10.2 10.8 11.4 12.0

Supply Voltage (V)

Battery Regulation Voltage (V)

VBAT = 8.2V

ILOAD = 50 mA

TA = +25°C

8.16

8.17

8.18

8.19

8.20

8.21

8.22

8.23

8.24

-5 5 1525354555

Ambient Temperature (°C)

Battery Regulation Voltage (V)

VBAT = 8.2V

VDD = 9.2V

ILOAD = 50 mA

8.16

8.17

8.18

8.19

8.20

8.21

8.22

8.23

8.24

-5.0 5.0 15.0 25.0 35.0 45.0 55.0

Ambient Temperature (°C)

Battery Regulation Voltage (V)

VBAT = 8.2V

VDD = 9.2V

ILOAD = 150 mA

200

400

600

800

1000

1200

1 3 5 7 9 11 13 15 17 19

Programming Resistor (kΩ)

Charge Current (mA)

VBAT = 8.2V

VDD = 9.2V

TA = +25°C

700

720

740

760

780

800

820

840

860

880

900

8.4 9.0 9.6 10.2 10.8 11.4 12.0

Supply Voltage (V)

Charge Current (mA)

RPROG = 1.3 kΩ

TA = +25°C

MCP73213

TYPICAL PERFORMANCE CURVES (CONTINUED)

Note: Unless otherwise indicated, VDD = [VREG(Typical) + 1V], IOUT = 10 mA and TA= +25°C, Constant-voltage mode.

FIGURE 2-7: Charge Current (IOUT) vs.

Programming Resistor (RPROG).

FIGURE 2-8: Charge Current (IOUT) vs.

Programming Resistor (RPROG).

FIGURE 2-9: Charge Current (IOUT) vs.

Ambient Temperature (TA).

FIGURE 2-10: Charge Current (IOUT) vs.

Ambient Temperature (TA).

FIGURE 2-11: Battery Short Protection

Regulation Current (ISHORT) vs. Ambient

Temperature (TA).

FIGURE 2-12: Output Leakage Current

(IDISCHARGE) vs. Ambient Temperature (TA).

100

106

112

118

124

130

136

142

148

154

160

8.4 9.0 9.6 10.2 10.8 11.4 12.0

Supply Voltage (V)

Charge Current (mA)

RPROG = 10 kΩ

TA = +25°C

200

210

220

230

240

250

260

270

280

290

300

8.4 9.0 9.6 10.210.811.412.0

Supply Voltage (V)

Charge Current (mA)

RPROG = 5 kΩ

TA = +25°C

-5 0 5 10 15 20 25 30 35 40 45 50 55

Ambient Temperature (°C)

Charge Current (mA)

VBAT = 8.2V

RPROG = 20 kΩ

VDD = 12V

VDD = 11V

VDD = 8.5V

VDD = 9.2V

550

560

570

580

590

600

-5 0 5 10 15 20 25 30 35 40 45 50 55

Ambient Temperature (°C)

Charge Current (mA)

VDD = 8.5V

VDD = 9.2V

VDD = 11V

VDD = 12V

VBAT = 8.2V

RPROG = 2 kΩ

-45-35-25-15-5 5 1525354555657585

Ambient Temperature (C)

BSP Regulation Current (mA)

VDD = 9.2V

-1.0

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

-5.0 5.0 15.025.035.045.055.0

Ambient Temperature (°C)

Discharge Current (uA)

VDD < VBAT

VDD < VSTOP

End of Charge

MCP73213

TYPICAL PERFORMANCE CURVES (CONTINUED)

Note: Unless otherwise indicated, VDD = [VREG(Typical) + 1V], IOUT = 10 mA and TA= +25°C, Constant-voltage mode.

FIGURE 2-13: Battery Voltage Accuracy

(VRTOL) vs. Supply Voltage (VDD).

FIGURE 2-14: Load Transient Response

(ILOAD = 50 mA/Div, Output: 100 mV/Div, Time:

100 µs/Div).

FIGURE 2-15: Input Overvoltage

Protection.

FIGURE 2-16: Complete Charge Cycle

(875 mAh Li-Ion Battery).

FIGURE 2-17: Line Transient Response

(ILOAD = 10 mA) (1 00 µs/Div).

FIGURE 2-18: Line Transient Response

(ILOAD = 100 mA) (100 µs/Div).

-0.5

-0.3

-0.1

0.1

0.3

0.5

8.4 9.0 9.6 10.2 10.8 11.4 12.0

Supply Voltage (V)

Battery Voltage Accuracy (%)

VBAT = 8.2V

ILOAD = 150 mA

TA = +25°C

Output Ripple (V)

Output Current (mA)

0 102030405060708090

Time (Minutes)

Battery Voltage (V)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.1

1.2

Supply Current (A)

VDD = 9V

RPROG = 1.5 kΩ

875 mAh Li-Ion Battery

Thermal Foldback

Input Voltage

Battery Voltage

Output Current

Output Ripple (V)

Source Voltage (V)

Output Ripple (V)

Source Voltage (V)

MCP73213

NOTES:

MCP73213

3.0 PIN DESCRIPTION

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1: PIN FUNCTION TABLES

3.1 Battery Management Input Supply

(VDD)

A supply voltage of [VREG (Typical) + 0.3V] to 13.0V is

recommended. Bypass to VSS with a minimum of 1 µF.

The VDD pin is rated 18V absolute maximum to prevent

suddenly rise of input voltage from spikes or low cost

ac-dc wall adapter.

3.2 Battery Charge Control Output

(VBAT)

Connect to the positive termin al of the battery. Bypass

to VSS with a minimum o f 1 µF to ensure loop stability

when the battery is disconnected.

3.3 No Connect (NC)

No connect.

3.4 Status Output (STAT)

STA T is an open-drain logic output for connection to an

LED for charge status indication in standalone

applications. Alternatively, a pull-up resistor can be

applied for interfacing to a host microcontroller. Refer to

Table 5-1 for a summary of the status output during a

charge cycle.

3.5 Battery Management 0V Reference

(VSS)

Connect to the negative terminal of the battery and

input supply.

3.6 Current Regulation Set (PROG)

The fast charge current is set by placing a resistor from

PROG to VSS during constant current (CC) mode.

PROG pin also serves as charge control enable. When

a typical 200 kΩ impedance is applied to PROG pin,

the MCP73213 is disabled until th e high-impedance is

removed. Refer to Section 5.5 “Constant Current

Mode - Fast Charge” for details.

3.7 Exposed Pad (EP)

The Exposed Thermal Pad (EP) shall be connected to

the exposed copper area o n the Printed Circuit Board

(PCB) for the thermal enhancement. Additional vias on

the copper area under the MCP73213 device can

improve the performance of heat dissipation and

simplify the assembly process.

MCP73213

Symbol I/O Description

DFN-10

1, 2 VDD I Battery Management Input Supply

3, 4 VBAT I/O Battery Charge Control Output

5, 6 NC — No Connection

7 STAT O Battery Charge Status Output

8, 9 VSS — Battery Management 0V Reference

10 PROG I/O Battery Charge Current Regulation Program and Charge Control Enable

11 EP — Exposed Pad

MCP73213

NOTES:

MCP73213

4.0 DEVICE OVERVIEW

The MCP73213 are simple, but fully integrated linear

charge management controllers. Figure 4-1 depicts

the operational flow algorithm.

FIGURE 4-1: The MCP73213 Flow Chart.

VBAT < VPTH

Timer Expired

SHUTDOWN MODE

VDD < VUVLO

VDD < VPD

PROG > 200 kΩ

STAT = HI-Z

TEMPERATURE FAULT

No Charge Current

STAT = Flashing (Op.1)

STAT = Hi-Z (Op.2)

Timer Suspended

TIMER FAULT

No Charge Current

STAT = Flashing (Op.1)

STAT = Hi-Z (Op.2)

Timer Suspended

PRECONDITIONING MODE

Charge Current = IPREG

STAT = LOW

T imer Reset

Timer Enable

FAST CHARGE MODE

Charge Current = IREG

STAT = LOW

T imer Reset

T i mer Enabled

CONSTANT VOLTAGE MODE

Charge Voltage = VREG

STAT = LOW

CHARGE COMPLETE MODE

No Charge Current

STAT = HI-Z

T imer Reset

VBAT > VPTH

VBAT = VREG

VBAT < ITERM

VBAT > VPTH

VBAT < VRTH

VDD < VOVP

VDD > VOVP

OVERVOLTAGE PROTECTION

No Charge Current

STAT = Hi-Z

Timer Suspended

VDD > VOVP

VDD < VOVP

VDD > VOVP

VDD < VOVP

Timer Expired

TIMER FAULT

No Charge Current

STAT = Flashing (Op.1)

STAT = Hi-Z (Op.2)

Timer Suspended

Die Temperature > TSD

Die Temperature < TSDHYS

Charge Mode Resume

BATTERY SHORT PROTECTION

Charge Current = ISHORT

STAT = Flashing (Op.1)

STAT = Hi-Z (Op.2)

Timer Suspended

VBAT > VSHORT

VBAT < VSHORT

Charge Mode Resume

MCP73213

NOTES:

MCP73213

5.0 DETAILED DESCRIPTION

5.1 Undervoltage Lockout (UVLO)

An internal undervoltage lockout (UVLO) circuit

monitors the input voltage and keeps the charger in

shutdown mode until the input supply rises above the

UVLO threshold. In the event a battery is present when

the input power is applied, the input supply must rise

approximately 150 mV above the battery voltage

before the MCP73213 device becomes operational.

The UVLO circuit places the device in shutdown mode

if the input supply falls to approximately 150 mV above

the battery voltage.The UVLO circuit is always active.

At any time, the input supply is below the UVLO

threshold or approximately 150 mV of the voltage at the

VBAT pin, the MCP73213 device is placed in a

shutdown mode.

5.2 Overvoltage Protection (OVP)

An internal overvoltage protection (OVP) circuit

monitors the input voltage and keeps the charger in

shutdown mode when the input supply rises above the

typical 13V, OVP threshold. The hysteresis of OVP is

approximately 150 mV for the MCP73213 device.

The MCP73213 device is operational between UVLO

and OVP threshold. The OVP circuit is also recognized

as overvoltage lock out (OVLO).

5.3 Charge Qualification

When the input power is applied, the input supply must

rise 150 mV above the battery voltage before the

MCP73213 becomes operational.

The automati c power down circuit places the d evice i n

a shutdown mode if the input supply falls to within

+50 mV of the battery voltage.

The automatic circuit is always active. At any time the

input supply is within +50 mV of the voltage at the

VBAT pin, the MCP73213 is placed in a shutdown

mode.

For a charge cycle to begin, the automatic power

down conditions must be met and the charge enable

input must be above the input high threshold.

5.3.1 BATTERY MANAGEMENT INPUT

SUPPLY (VDD)

The VDD input is the input supply to the MCP73213.

The MCP73213 automatically enters a Power-down

mode if the voltage on the VDD input falls to within

+50 mV of the battery voltage. This feature prevents

draining the battery pack when the VDD supply is not

present.

5.3.2 BATTERY CHARGE CONTROL

OUTPUT (VBAT)

The battery charge control output is th e drain terminal

of an internal P-channel MOSFET. The MCP73213

provides constant current and voltage regulation to the

battery pack by controlling this MOSFET in the linear

region. The battery charge control output should be

connected to the positive terminal of the battery pack.

5.3.3 BATTERY DETECTION

The MCP73213 detects the battery presence with

charging of the output capacitor. The charge flow will

initiate when the voltage on VBAT is pulled below the

VRECHARGE threshold. Refer to Section 1.0

“Electrical Characteristics” for VRECHARGE values.

The value will be the same for non-rechargeable

device.

When VBAT >V

REG + Hysteresis, the charge will be

suspended or not start, depen ding on the condition to

prevent over charge that may occur.

5.4 Preconditioning

If the voltage at the VBAT pin is less than the

preconditioning threshold, the MCP73213 device

enters a preconditioning mode. The preconditioning

threshold is factory set. Refer to Section 1.0

“Electrical Characteristics” for preconditioning

threshold options.

In this mode, the MCP73213 device supplies 10% of

the fast charge current (established with the value of

the resistor connected to the PROG pin) to the battery.

When the voltage at the VBAT pin rises above the

preconditioning threshold, the MCP73213 device

enters the constant current (fast charge) mode.

5.4.1 TIMER EXPIRED DURING

PRECONDITIONING MODE

If the internal timer expires before the voltage threshold

is reached for fast charge mode, a timer fault is

indicated and the charge cycle terminates. The

MCP73213 device remains in this condition until the

battery is removed or input power is cycled. If the

battery is removed, the MCP73213 device enters the

Stand-by mode where it remains until a battery is

reinserted.

Note: The MCP73213 device also offers options

with no preconditionin g.

Note: The typical preconditioning timer for

MCP73213 is 32 minutes. The MCP73213

also offers options with no preconditioning

timer.

MCP73213

5.5 Constant Current Mode - Fast

Charge

During the constant current mode, the programmed

charge current is supplied to the battery or load.

The charge current is established using a single

resistor from PROG to VSS. The program resistor and

the charge current are calculated using the following

equation:

EQUATION 5-1:

EQUATION 5-2:

Table 5-1 provides commonly seen E96 (1% ) and E2 4

(5%) resistors for various charge current to reduce

design time.

TABLE 5-1: RESISTOR LOOKUP TABLE

Constant current mode is maintained until the voltage

at the VBAT pin reaches the regulation voltage, VREG.

When constant current mode is invoked, the internal

timer is reset.

5.5.1 TIMER EXPIRED DURING

CONSTANT CURRENT - FAST

CHARGE MODE

If the internal timer expires before the recharge voltage

threshold is reached, a timer faul t is indicated and the

charge cycle terminates. The MCP73213 device

remains in this condition until the battery is removed. If

the battery is removed or input power is cycled, the

MCP73213 device enters the Stand-by mode where it

remains until a battery is reinserted.

5.6 Constant Voltage Mode

When the voltage at the VBAT pin reaches the

regulation voltage, VREG, constant voltage regulation

begins. The regulation voltage is factory set to 8.2V,

8.4V, 8.7V or 8.8V with a tolerance of ± 0.5%.

5.7 Charge Termination

The charge cycle is terminated when, during constant

voltage mode, the average charge current diminishes

below a threshold established with the value of 5%,

7.5%, 10% or 20% of fast charge current or internal

timer has expired. A 1 ms filter time on the termination

comparator ensures that transient load conditions do

not result in premature charge cycle termination. The

timer period is factory set and can be disabled. Refer to

Section 1.0 “Electrical Characteristics” for timer

period options.

5.8 Automatic Recharge

The MCP73213 device continuously monitors the

voltage at the VBAT pin in the charge complete mode. If

the voltage drops below the recharge threshold,

another charge cycle begins and cu rrent is once again

supplied to the battery or load. The recharge threshold

is factory set. Refer to Section 1.0 “Electrical

Characteristics” for recharge threshold option s .

For the MCP73213 device with no recharge option, the

MCP73213 will go into standby mode when termination

condition is met. The charge will not restart until

following conditions have been met:

• Battery is removed from the system and inserted

again

•V

DD is removed and plugged in again

• RPROG is disconnected (or high impedance) and

reconnected

Charge

Current (mA)

Recommended

E96 Resistor (Ω)

Recommended

E24 Resistor (Ω)

130 10k 10k

150 8.45k 8.20k

200 6.20k 6.20k

250 4.99k 5.10k

300 4.02k 3.90k

350 3.40k 3.30k

400 3.00k 3.00k

450 2.61k 2.70k

500 2.32k 2.37k

550 2.10k 2.20k

600 1.91k 2.00k

650 1.78k 1.80k

700 1.62k 1.60k

750 1.50k 1.50k

800 1.40k 1.50k

850 1.33k 1.30k

900 1.24k 1.20k

950 1.18k 1.20k

1000 1.10k 1.10k

1100 1.00k 1.00k

IREG 1104 RPROG 0.93–

Where:

RPROG = kilo-ohms (kΩ)

IREG = milliampere (mA)

RPROG 10

IREG

1104

------------

⎝⎠

⎛⎞

log

⎝⎠

⎛⎞

0.93–()

⁄

Where:

RPROG = kilo-ohms (kΩ)

IREG = milliampere (mA)

Note: The MCP73213 also offers options with no

automatic recharge.

MCP73213

5.9 Thermal Regulation

The MCP73213 shall limit the charge current based on

the die temperature. The thermal regulation optimizes

the charge cycle time while maintaining device

reliability. Figure 5-1 depicts the thermal regulation for

the MCP73213 device. Refer to Section 1.0

“Electrical Characteristics” for thermal package

resistances and Section 6.1.1.2 “Thermal

Considerations” for calculating power dissipation.

FIGURE 5-1: Thermal Regulation.

5.10 Thermal Shutdown

The MCP73213 suspends charge if the die

temperature exceeds +150°C. Charging will resume

when the die temperature has cooled by approximately

10°C. The thermal shutdown is a secondary safety

feature in the event that there is a failure within the

thermal regulation circuitry.

5.11 Status Indicator

The charge status outputs are open-drain ou tputs with

two different states: Low (L), and High Impedance

(Hi-Z). The charge status outputs can be used to

illuminate LEDs. Optionally, the charge status outputs

can be used as an interface to a host microcontroller.

Table 5-2 summarize the state of the status outputs

during a charge cycle.

5.12 Battery Short Protection

Once a single-cell Li-Ion battery is detected, an internal

battery short protection (BSP) circuit starts monitoring

the battery voltage. When VBAT falls below a typical

1.7V battery short protection threshold voltage, the

charging behavior is postponed. 25 mA (typical)

detection current is supplied for recovering from battery

short condition.

Preconditioning mode resumes when VBAT raises

above battery short protection threshold. The battery

voltage must rise approximately 150 mV above the

battery short protection voltage before the MCP73213

device become operational.

120

150

25 40 55 70 85 100 115 130 145 160

Junction Temperature (°C)

Fast Charge Current (mA)

VDD = 9.1V

RPROG = 10 kΩ

TABLE 5-2: STATUS OUTPUTS

CHARGE CYCLE

STATE STAT

Shutdown Hi-Z

Standby Hi-Z

Preconditioning L

Constant Current Fast

Charge L

Constant Voltage L

Charge Complete - Standby Hi-Z

Temperature Fault 1.6 second 50% D.C.

Flashing (Type 2)

Hi-Z (Type 1)

Timer Fault 1.6 second 50% D.C.

Flashing (Type 2)

Hi-Z (Type 1)

Preconditioning Timer Fault 1.6 second 50% D.C.

Flashing (Type 2)

Hi-Z (Type 1)

MCP73213

NOTES:

MCP73213

6.0 APPLICATIONS

The MCP73213 is de si gned to operate in conjunction

with a host microcontroller or in stand-alone

applications. The MCP73213 provides the preferred

charge algorithm for dual Lithium-Ion or

Lithium-Polymer cells Constant-current followed by

Constant-voltage. Figure 6-1 depicts a typical

stand-alone application circuit, while Figure 6-2

depicts the accompanying charge profile.

FIGURE 6-1: Typical Application Circuit.

FIGURE 6-2: Typical Charge Profile

(875 mAh Li-Ion Battery).

VDD

RPROG

CIN COUT

RLED

2-Cell

Li-Ion

Battery

MCP73213 Typical Application

VDD

STAT

VBAT

PROG

VSS

Ac-dc-Adapter

0 102030405060708090

Time (Minutes)

Battery Voltage (V)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.1

1.2

Supply Current (A)

VDD = 9V

RPROG = 1.5 kΩ

875 mAh Li-Ion Battery

Thermal Foldback

MCP73213

6.1 Application Circuit Design

Due to the low efficiency of linear charging, the most

important factors are thermal design and cost, which

are a direct function of the input voltage, output current

and thermal impedance between the battery charger

and the ambient cooling air . The worst-case situation is

when the device has transitioned from the

Preconditioning mode to the Constant-current mode. In

this situation, the battery charger has to dissipate the

maximum power. A trade-off must be made between

the charge current, cost and thermal requirements of

the charger.

6.1.1 COMPONENT SELECTION

Selection of the external components in Figure 6-1 is

crucial to the integrity and reliability of the charging

system. The following discussion is intended as a guide

for the component selection process.

6.1.1.1 Charge Current

The preferred fast charge current for Li-Ion / Li-Poly

cells is below the 1C ra te, with an absolute maximum

current at the 2C rate. The recommended fast charge

current should be obtained from battery

manufacturer. For example, a 500 mAh battery pack

with 0.7C preferred fast charge current has a charge

current of 350 mA. Charging at this rate provides the

shortest charge cycle times without degradation to the

battery pack performance or life.

6.1.1.2 Thermal Consid erations

The worst-case power dissipation in the battery

charger occurs when the input voltage is at the

maximum and the device has transitioned from the

Preconditioning mode to the Constant-current mode. In

this case, the power dissipation is:

EQUATION 6-1:

Power dissipation with a 9V, ±10% input voltage

source, 500 mA ±10% and preconditioning threshold

voltage at 6V is:

EQUATION 6-2:

This power dissipation with the battery charger in the

DFN-10 package will result approximately 92°C ab ove

room temperature.

6.1.1.3 External Capacitors

The MCP73213 is stable with or without a battery load.

In order to maintain good AC stability in the Con stant-

voltage mode, a minimum capacitance of 1 µF is

recommended to bypass the VBAT pin to VSS. This

capacitance provides compensation when there is no

battery load. In addition, the battery and

interconnections appea r inductive at high frequencies.

These elements are in the control feedback loop during

Constant-voltage mode. Therefore, the bypass

capacitance may be necessary to compensate for the

inductive nature of the battery pack.

A minimum of 16V rated 1 µF , is recommended to apply

for output capacitor and a minimum of 25V rated 1 µF,

is recommended to apply for in put ca pacitor for typical

applications.

TABLE 6-1: MLCC CAPACITOR EXAMPLE

Virtually any good quality output filter capacitor can be

used, independent of the capacitor’s minimum

Effective Series Resistance (ESR) value. The actual

value of the capacitor (and its associated ESR)

depends on the output load current. A 1 µF ceramic,

tantalum or aluminum electrolytic capacitor at the

output is usually sufficient to ensure stability.

6.1.1.4 Reverse-Blocking Protection

The MCP73213 provides protection from a faulted or

shorted input. Without the protection, a faulted or

shorted inpu t would discharge th e battery pack th rough

the body diode of the internal pass transistor.

Note: Please consult with your battery supplier

or refer to battery data sheet for preferred

charge rate.

PowerDissipation VDDMAX VPTHMIN

–()IREGMAX

Where:

VDDMAX = the maximum input voltage

IREGMAX = the maximum fast charge current

VPTHMIN = the minimum transition threshold

voltage

MLCC

Capacitors

Temperature

Range Tolerance

X7R -55°C to +125°C ±15%

X5R -55°C to +85°C ±15%

PowerDissipation 9.9V6.0V–()550mA

2.15W==

MCP73213

6.2 PCB Layout Issues

For optimum voltage regulation, place the battery pack

as close as possible to the device’s VBAT and VSS pins,

recommended to minimize voltage drops along the

high current-carrying PCB traces.

If the PCB layout is used as a heatsink, adding many

vias in the heatsink pad can help conduct more heat to

the backplane of the PCB, thus reducing the maximum

junction temperature. Figure 6-4 and Figure 6-5 depict

a typical layout with PCB heatsinking.

FIGURE 6-3: Typical Layout (Top).

FIGURE 6-4: Typical Layout (Top Metal).

FIGURE 6-5: Ty pical Layout (Bott om ) .

102-00261

MCP73213EV

MCP73213

NOTES:

MCP73213

7.0 PACKAGING INFORMATION

7.1 Package Marking Information

XXXX

10-Lead DFN (3x3)

YYWW

NNN

Example:

Standard *

Part Number Code

MCP73213-A6SI/MF Z3HI

MCP73213-B6SI/MF Y3HI

Z3HI

0923

256

Legend: XX...X Customer-specific information

Y Year code (last digit of calendar year)

YY Year code (last 2 digits of calendar year)

WW Week code (week of January 1 is week ‘01’)

NNN Alphanumeric traceability code

Pb -free JEDEC designator for Matte Tin (Sn)

*This package is Pb-free. The Pb-free JEDEC designator ( )

can be found on the outer packaging for this package.

Note: In the event the full Microchip part number cannot be marked on one line, it will

be carried over to the next line, thus limiting the number of available

characters for customer-specific information.

MCP73213

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EXPOSED

PAD

BOTTOM VIEW

TOP VIEW

A3 A1

NOTE 2

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MCP73213

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MCP73213

NOTES:

MCP73213

APPENDIX A: REVISION HISTORY

Revision B (December 2009)

The following is the list of modificatio ns:

1. Updated the Battery Short Protection values in

the DC Characteristics table.

Revision A (July 2009)

• Original Release of this Document.

MCP73213

NOTES:

MCP73213

PRODUCT IDENTIFICATION SYSTEM

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Device: MCP73213: Dual Cell Li-Ion/Li-Polymer Battery Device

MCP73213T: Dual Cell Li-Ion/Li-Polymer Battery Device,

Tape and Reel

Temperature

Range: I= -40°C to +85°C (Industrial)

Package: MF = Plastic Dual Flat No Lead, 3x3 mm Body (DFN),

10-Lead

PART NO. XXX

PackageTemperature

Range

Device

Examples:

a) MCP73213-A6SI/MF: Dual Cell Li- Ion/

Li-Polymer Battery Device

b) MCP73213-B6SI/MF: Dual Cell Li- Ion/

Li-Polymer Battery Device

c) MCP73213T-A6SI-MF:Tape and Reel,

Dual Cell Li-Ion/

Li-Polymer Battery Device

d) MCP73213T-B6SI/MF: Tape and Reel,

Dual Cell Li-Ion/

Li-Polymer Battery Device

MCP73213

NOTES:

Information contained in this publication regarding device

applications and the like is provided only for your convenience

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

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QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

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the buyer’s risk, and the buyer agrees to defen d, indemnify and

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suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

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All other trademarks mentioned herein are property of their

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Cleveland

Independence, OH

Tel: 216-447-0464

Fax: 216-447-0643

Dallas

Addison, TX

Tel: 972-818-7423

Fax: 972-818-2924

Detroit

Farmington Hills, MI

Tel: 248-538-2250

Fax: 248-538-2260

Kokomo

Kokomo, IN

Tel: 765-864-8360

Fax: 765-864-8387

Los Angeles

Mission Viejo, CA

Tel: 949-462-9523

Fax: 949-462-9608

Santa Clara

Santa Clara, CA

Tel: 408-961-6444

Fax: 408-961-6445

Toronto

Mississauga, Ontario,

Canada

Tel: 905-673-0699

Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor

Tower 6, The Gateway

Harbour City, Kowloon

Hong Kong

Tel: 852-2401-1200

Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733

Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8528-2100

Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511

Fax: 86-28-8665-7889

China - Hong Kong SAR

Tel: 852-2401-1200

Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460

Fax: 86-25-8473-2470

China - Qingdao

Tel: 86-532-8502-7355

Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533

Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829

Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660

Fax: 86-755-8203-1760

China - Wuhan

Tel: 86-27-5980-5300

Fax: 86-27-5980-5118

China - Xiamen

Tel: 86-592-2388138

Fax: 86-592-2388130

China - Xian

Tel: 86-29-8833-7252

Fax: 86-29-8833-7256

China - Zhuhai

Tel: 86-756-3210040

Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444

Fax: 91-80-3090-4080

India - New Delhi

Tel: 91-11-4160-8631

Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512

Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166

Fax: 81-45-471-6122

Korea - Daegu

Tel: 82-53-744-4301

Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200

Fax: 82-2-558-5932 or

82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857

Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870

Fax: 60-4-227-4068

Philippines - Manila

Tel: 63-2-634-9065

Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870

Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-6578-300

Fax: 886-3-6578-370

Taiwan - Kaohsiung

Tel: 886-7-536-4818

Fax: 886-7-536-4803

Taiwan - Taipei

Tel: 886-2-2500-6610

Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351

Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39

Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828

Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20

Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0

Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611

Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399

Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90

Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869

Fax: 44-118-921-5820

WORLDWIDE SALES AND SERVICE

03/26/09