APE1702S - Advanced Power Electronics Corp. USA

Advanced Power

Electronics Corp.

FEATURES DESCRIPTION

Output Voltage : 3.3V, 5V, 12V and Adjustable

Output Voltage

Adjustable Version Output Voltage Range, 1.23V

to 19.5V+4%

150KHz +15% Fixed Switching Frequency.

Voltage Mode Non-synchronous PWM Control.

Thermal-shutdown and Current-limit Protection.

ON/OFF Shutdown Control Input.

Short Circuit Protect(SCP)

Operating Voltage can be up to 22V

Output Load Current 3A

5-Lead TO-263/TO-220

Low Power Standby Mode.

Built-in Switching Transistor on Chip

RoHS Compliant

1. ADJUSTABLE OUTPUT VOLTAGE VERSION

2. ADJUSTABLE OUTPUT VOLTAGE VERSION WITH DELAYED STARTUP

Data and specifications subject to change without notice 200803105

APE1702

TYPICAL APPLICATION

150KHz, 3A PWM BUCK DC/DC CONVERTER

The APE1702 series are monolithic IC designed for a

step-down DC/DC converter, and own the ability of driving a

3A load without additional transistor. It saves board space.

The external shutdown function can be controlled by logic

level and then come into standby mode. The internal compen-

sation makes feedback control having good line and load

regulation without external design. Regarding protected function,

thermal shutdown is to prevent over temperature operating

from damage, and current limit is against over current operating

of the output switch. if current limit function occurs and VFB

is down below 0.5V the switching frequency will be reduced.

The APE1702 series operates at a switching frequency of

150KHz thus allow smaller sized filter components than what

would be needed with lower frequency switching regulators.

Other features include a guaranteed +4% tolerance on output

voltage under specified input voltage and output load con-

ditions, and +15% on the oscillator frequency. The output

version included fixed 3.3V, 5V, 12V and an adjustable type.

The chips are available in a 5-Lead TO-263 and 5-Lead

TO-220 package.

Advanced Power

Electronics Corp.

3. FIXED OUTPUT VOLTAGE VERSION

APE1702X-XX

TYPICAL APPLICATION APE1702

ORDERING INFORMATIO

ORDER INFORMATION

PACKAGE TYPE OUTPUT VOLTAGE

S : TO-263-5L

P : TO-220-5L 33 : 3.3V

50 : 5.0V

12 : 12V

Blank : ADJ

Advanced Power

Electronics Corp. APE1702

ABSOLUTE MAXIMUM RATINGS (at TA=25°C)

Maximum Supply Voltage(VCC) +24V

ON/OFF PIN Input Voltage(VEN) -0.3V to VCC

Feedback PIN Voltage(VFB) -0.3V to 16V

Output Voltage to Ground(VOUT) -0.7 to 24V

Power Dissipation(PD) (TJ-TA)/RthJA

Storage Temperature Range(TST) -65°C To 150°C

Operating Temperature Range(TOP) -40°C To 125°C

Operating Supply Voltage(VOP) +4.5V to +22V

Thermal Resistance from Junction to Case(RthJC) 3.5°C/W

20°C/W

Note. RthJA is measured with the PCB copper area(need connect to Metal tab) of approx. 3 in2(multi-layers)

PACKAGE INFORMATION

ELECTRICAL SPECIFICATIONS

(VIN=12V, TA=25℃, unless otherwise specified)

Parameter SYM TEST CONDITION MIN TYP MAX UNITS

Quiescent Current ICCQ VFB=12V force driver off - 4 8 mA

VFB=1.3V - -10 -50.0

(ADJ Version Only) - -10 -100.0

VEN=5V - 35 100 uA

VCC=22V - 35 100 uA

Pear Current, No outside circuit

VFB=0V force driver on

Max. Duty Cycle (ON) VFB=0V force driver on - 100 - %

Min. Duty Cycle (OFF) VFB=12V force driver off - 0 - %

127 150 173 KHz

110 - 173 KHz

Oscillation Frequency of Short (Adjustable) When VFB < 0.5V KHz

Circuit Protect (Fixed) When < VOUT x 40% KHz

IOUT=2A, No outside circuit 1.5

VFB=0V force driver on 1.6

Thermal Resistance from Junction to Ambient(RthJA)

Feedback Bias Current IFB nA

Shutdown Supply Current ISD

FOSC

Oscillation Frequency

Current Limit 3.3 - -

ICL

FSCP --60

VSaturation Voltage VSAT - 1.3

TO-263-5L TO-220-5L

Advanced Power

Electronics Corp. APE1702

ELECTRICAL SPECIFICATIONS(Cont.)

Parameter SYM TEST CONDITION MIN TYP MAX UNITS

VIH High (regulator ON) 2 - V

VIL Low (regulator OFF) - 0.6 V

ISH VEN=2.5V(OFF) - -0.1 -0.5 uA

ISL VEN=0.5V(ON) - - -0.01 uA

No outside circuit

VFB=12V force driver on

SW PIN=-0.8V VCC=22V force driver off --5 -mA

Thermal Shutdown Temp. TSD -135 -°C

Version Characteristics Symbol Conditions MIN TYP MAX UNITS

4.5V < VCC < 22V

0.2A < ILOAD <3A

VOUT programmed for 3.3V

ηVCC=12V, ILOAD=3A -74- %

4.75V < VCC < 22V

0.2A < ILOAD <3A

ηVCC=12V, ILOAD=3A -75- %

7V < VCC < 22V

0.2A < ILOAD <3A

ηVCC=12V, ILOAD=3A -80- %

15V < VCC < 22V

0.2A < ILOAD <3A

ηVCC=15V, ILOAD=3A - 89 - %

PIN DESCRIPTIONS

PIN SYMBOL PIN DESCRIPTION

VSS GND Pin

FB Control Voltage Feedback Control for ADJ Version

EN ON/OFF Shutdown

OUT Output Voltage Feedback Control for Fixed Version

SW Switching Output

VCC IC Power Supply Pin

EN PIN Logic Input Threshold Volta

EN PIN Input Current

1.3

APE1702-3.3V VOUT 3.168/

3.135

APE1702-12V

VFB

APE1702-ADJ 1.193/

1.180 1.23 1.267/

1.280 V

SW PIN=0V - - -200

ISWL

3.3 3.432/

3.465 V

APE1702-5.0V VOUT 4.80/

4.75 5.0 5.20/

5.25 V

VOUT 11.52/

11.4 12 12.48/

12.6

SW PIN

Leakage

Current

Output

Feedback

Voltage

Efficiency

Output

Voltage

Efficiency

Output

Voltage

Efficiency

Output

Voltage

Advanced Power

Electronics Corp. APE1702

BLOCK DIAGRAM

FUNCTION DESCRIPTION

PIN FUNCTION

VCC

VSS

FEEDBACK

This is positive input supply for the IC switching regulator. A suitable input bypass

capacitor must be presented at this pin to minimize voltage transients and to supply

the switching currents needed by the regulator.

Circuit

round.

Internal Switch. The voltage at this pin switches between (+VCC - VSAT) and

approximately - 0.5V, with a duty cycle of approximately VOUT / VCC. To minimize

coupling to sensitive circuitry, the PC board copper area connected to this pin should

be minimized.

Senses in the regulated output voltage to complete the feedback loop.

Advanced Power

Electronics Corp. APE1702

FUNCTION DESCRIPTION

THERMAL CONSIDERATIONS

Allows the switching regulator circuit to be shutdown using logic level signals thus

dropping the total input supple current to approximately 100uA. Pulling this pin below

a threshold voltage of approximately 1.3V turns the regulator on, and pulling this pin

above 1.3V (up to a maximum of VCC) shuts the regulator down. if this shutdown

feature is not needed, the EN pin can be wired to the ground pin.

The TO-263-5L package needs a heat sink under most conditions. The size of

the heat sink depends on the input voltage, the output voltage, the load current and

the ambient temperature. The APE1702 junction temperature rises above ambient

temperature for a 2A load and different input and output voltages.

The data for these curves was taken with the APE1702 (TO-263-5L package)

operating as a buck-switching regulator in an ambient temperature of 25°C (still air).

These temperature increments are all approximate and are affected by many factors.

Higher ambient temperatures required more heat sinker.

For the best thermal performance, wide copper traces and generous amounts of

printed circuit board copper (need connect to the VSS pins) should be used in the

board layout, (One exception is the SW pin, which should not have large areas of

copper.) to the surrounding air, and moving air lowers the thermal resistance even

further.

Package thermal resistance and junction temperature increments are all

approximate. The increments are affected by a lot of factors. Some of these factors

include board size, shape, thickness, position, location, and even board temperature.

Other factors are, trace width, total printed circuit copper area, copper thickness,

single or double-sided, multi-layer board and the amount of solder on the board.

The effectiveness of the PC board to dissipate heat also depends on the size,

quantity and spacing of other components on the board, as well as whether the

surrounding air is still or moving. Furthermore, some of these components such as the

catch diode will add heat to the PC board and the heat can vary as the input voltage

changes. For the inductor, depending on the physical size, type of core material and

the DC resistance, it could either act as a heat sink taking heat away from the board,

or it could add heat to the board.

APE1702

Typical Characteristics

VFB VS VIN ICCQ VS VIN

VFB VS VIN

1.18

1.20

1.22

1.24

1.26

1.28

4 6 8 1012141618202224

Vin(V)

VFB(V)

ICCQ VS VIN

0.00

1.00

2.00

3.00

4.00

5.00

6.00

4 6 8 1012141618202224

Vin(V)

Iccq(mA)

FOSC VS VIN

FOSC VS TEMPERATURE

Fosc VS VIN

140

145

150

155

160

165

170

4 6 8 10 12 14 16 18 20 22 24

Vin(V)

Fosc(KHz)

FOSC VS TEMP

120

130

140

150

160

170

180

-20 0 20 40 60 80 100 120

temp (℃)

Vout(V)

VFB VS TEMPERATURE

ICCQ VS TEMPERATURE

VFB VS TEMP

1.18

1.20

1.22

1.24

1.26

1.28

-20 0 20 40 60 80 100 120

temp (℃)

Vout(V)

I CCQ VS T E MP

0.00

1.00

2.00

3.00

4.00

5.00

6.00

-20 0 20 40 60 80 100 120

temp (℃)

Vout(V)

Advanced Power

Electronics Corp.

APE1702

Typical Characteristics

Output Ripple

IN=12V, VOUT=5V, IOUT=3A)

Power on test wave

(VIN=12V, VOUT=5V, IOUT=3A )

Load Transient Response

IN=12V, VOUT=5V, IOUT=0.2~3A)

EN on test wave

(VIN=12V, VOUT=5V, IOUT=3A )

Efficiency

(VIN=12V, VOUT=5.0V)

Efficiency

(VIN=12V, VOUT=3.3V)

10%

20%

30%

40%

50%

60%

70%

80%

90%

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Iout(A)

Efficiency(%)

10%

20%

30%

40%

50%

60%

70%

80%

90%

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Iout(A)

Efficiency(%)

OUT

(AC)

OUT

(AC)

OUT

Advanced Power

Electronics Corp.

Package Outline : TO-263-5L

Millimeters

MIN NOM MAX

A 4.40 4.60 4.80

b 0.66 0.79 0.91

L4 0.00 0.15 0.30

c 0.36 0.43 0.50

L1 2.29 2.54 2.79

E 9.80 10.10 10.40

c2 1.25 1.35 1.45

D 8.60 8.80 9.00

L 14.60 15.20 15.80

0° 4° 8°

1.All Dimensions Are in Millimeters.

2.Dimension Does Not Include Mold Protrusions.

Part Marking Information & Packing : TO-263-5L

7.60

1.27

5.90

1.70

SYMBOLS

ADVANCED POWER ELECTRONICS CORP.

Output voltage

Part Numbe

1702S-XX

YWWSSS LOGO

Date Code (YWWSSS)

Y：Last Digit Of The Year

WW：Week

SSS：Sequence

Part Numbe

YWWSSS LOGO

Y：Last Digit Of The Year

WW：Week

SSS：Sequence

Package Code

Package Outline : TO-220-5L

Millimeters

MIN NOM MAX

A4.07 4.45 4.82

b0.76 0.89 1.02

C0.36 0.50 0.64

D14.22 14.86 15.50

E9.78 10.16 10.54

e1.57 1.71 1.85

e1 6.68 6.81 6.93

F1.14 1.27 1.40

H1 5.46 6.16 6.86

J1 2.29 2.74 3.18

L13.21 13.97 14.73

3.68 3.81 3.94

2.54 2.73 2.92

1.All Dimensions Are in Millimeters.

2.Dimension Does Not Include Mold Protrusions.

Part Marking Information & Packing : TO-220-5L

SYMBOLS

ADVANCED POWER ELECTRONICS CORP.

φp

YWWSSS Package Code

Part Number

LOGO

Output voltage

1702P-XX

Date Code (YWWSSS)

Y：Last Digit Of The Year

WW：Week

SSS：Sequence