ACTIVE

STR3A451D

Package Image

Package : DIP8

RoHS : YES

Data Sheet(847KB)
Check Online Stock

The STR3A451D is a power IC for switching power supplies, incorporating a power MOSFET and a current-mode PWM controller IC.
The product achieves 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. Its enhanced protection functions also enable higher cost-effective power supply systems with few external components.

Data Download

Design Support

  • Technical Documents
  • Related Information

Technical Documents

Related Information

Features

    ・Low Thermal Resistance Package
    ・Improving circuit efficiency
    　(Since the step drive control can keep VRM of secondary
    　rectification diodes low, the circuit efficiency can be
    　improved by low VF.)
    ・Current Mode Type PWM Control
    ・Soft Start Function
    ・Auto Standby Function
    　No Load Power Consumption < 15mW
    ・Operation Mode
    　Normal Operation: PWM Mode
    　Light Load Operation: Green-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): Auto-restart
    　Thermal Shutdown (TSD): Auto-restart with hysteresis

Application

・AC/DC adapter
・White goods
・Other SMPS

Specifications

Control Method PWM
Type Power IC
Output Current 23 W
RDS(ON) (max.) 4.000 Ω
VDSS (min.) 650 V
VCC (max.) 32 V
Oscillating Frequency(typ.) 65 kHz
OCP YES
OLP Auto Restart
OVP Auto Restart
Brown-in / out NO
TSD Auto Restart
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

STR3A400 Series Lineup

Vdss=650V
fosc=65kHz
ProductsOVP,TSD
STR3A45xLatched shutdown
STR3A45xDAuto Restart

ProductsRonPout*
STR3A451/51D
STR3A453/53D
STR3A455/55D		4.0Ω
1.9Ω
1.1Ω		23W
35W
44W
*Open frame, 85VAC～265VAC

Questions or Comments?

Please feel free to contact us if you cannot find the desired product from the lineup.