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STR3A253

Package Image

Package : DIP8

RoHS : YES

Data Sheet(708KB)

The STR3A200 series are power ICs for switching power supplies, incorporating a MOSFET and a current-mode PWM controll IC.
The products achieve low power consumption and low standby power by including a startup circuit and a standby function that automatically switch operation modes – PWM mode in normal operation and burst-oscillation mode under light-load conditions.
Well-equipped with protection functions, the products also enable power supply systems to be more cost-effective with only a few external components.

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Design Support

  • Technical Documents

Technical Documents

Features

    ・Low Thermal Resistance Package
    ・Current Mode Type PWM Control
    ・Soft Start Function
    ・Auto Standby Function
    　No Load Power Consumption < 15mW
    ・Operation Mode
    　Normal Operation: PWM Mode
    　Standby: Burst Oscillation Mode
    ・Random Switching Function
    ・Slope Compensation Function
    ・Leading Edge Blanking Function
    ・Bias Assist Function
    ・Protections
    　Overcurrent Protection (OCP): Pulse-by-Pulse
    　Overload Protection (OLP): Auto-restart
    　Overvoltage Protection (OVP): Latched shutdown
    　Thermal Shutdown (TSD): Latched shutdown

Application

・AC/DC adapter
・White goods
・Other SMPS

Specifications

Control Method PWM
Type Power IC
Output Current 35 W
RDS(ON) (max.) 1.900 Ω
VDSS (min.) 650 V
VCC (max.) 32 V
Oscillating Frequency(typ.) 67 kHz
OCP YES
OLP Auto Restart
OVP Latch
Brown-in / out NO
TSD Latch
Power Consumption at No Load <15mW
Package Weight (Typ.) 0.51 g
Automotive Qualified NO

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Physical Dimensions

Physical Dimensions

Selection Guide

STR3A200 Series Lineup

Vdss=650V
fosc=67kHz
ProductsOVP,TSD
STR3A25xLatched shutdown
STR3A25xDAuto Restart

ProductsRonPout*
STR3A251/51D
STR3A253/53D
STR3A255/55D		4.0Ω
1.9Ω
1.1Ω		23W
35W
44W
*Open frame, 85VAC～265VAC

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