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SANKEN ELECTRIC CO., LTD.

STR3A150-DS

July 20, 2012

PWM Off-Line Switching Regulator ICs

STR3A151, STR3A152, STR3A153,

STR3A154, STR3A155

Features and Benefits (continued)

• Soft Start function: reduces stress on internal power MOSFET

and secondary output rectifier diode at startup

• Protection Functions:

▫ Overcurrent Protection function (OCP); pulse-by-pulse,

built-in compensation circuit to minimize OCP point variation

on AC input voltage

▫ Overload Protection function (OLP); auto restart, built-in

timer, reduces heat during overload condition, and no external

components required

▫ Overvoltage Protection function (OVP); latched shutdown

▫ Thermal Shutdown function (TSD); latched shutdown

Selection Guide

Part Number

(kHz)

MOSFET

(W)

OVP/TSD

(V)

(Ω)

230 VAC

85 to 265 VAC

STR3A151

67

650

4.0

24

16

Latched

STR3A152

3.0

30

23

STR3A153

1.9

36

30

STR3A154

1.4

40

32

STR3A155

1.1

43

35

*The listed output power is based on the thermal ratings, and the peak output power can be 120% to

140% of the value stated here. At low output voltage and short duty cycle, the output power may be less

than the value stated here.