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SANKEN ELECTRIC CO., LTD.

STR3A150D-DS

July 20, 2012

PWM Off-Line Switching Regulator ICs

STR3A151D, STR3A152D,

STR3A153D, STR3A154D,

STR3A155D

Functional Block Diagram

Functional Block Diagram

Functional Block Diagram

Pin-out Diagram

LEB

OCP

DRV

TSD

OVP

UVLO

Reg

OLP

PWM

Oscillator

FB/OLP

S/OCP

D/ST

GND

Control Part

4

1

3

VCC

2

5, 6,

7, 8

Drain Peak Current

compensation

Slope

compensation

Feedback

control

Startup

S Q

R

Pin List Table

Number

Name

Function

1

S/OCP

MOSFET source and input of Overcurrent Protection (OCP) signal

2

VCC

Power supply voltage input for Control Part and input of Overvoltage

Protection (OVP) signal

3

GND

Ground

4

FB/OLP

Feedback signal input for constant voltage control signal and input of

Overload Protection (OLP) signal

5, 6,7, 8

D/ST

MOSFET drain pin and input of the startup current

1

2

3

4

8

7

6

5

D/ST

D/ST

D/ST

D/ST

S/GND

VCC

GND

FB/OLP