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STR3A455D

The STR3A455D 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.

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 44 W
RDS(ON) (max.) 1.1 Ω
VDSS (min.) 650.00 V
VCC (max.) 32.00 V
Oscillating Frequency(typ.) 65
OCP YES
OLP Auto Restart
OVP Auto Restart
Brown-in / out NO
TSD Latch
Power Consumption at No Load <15mW

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Questions or Comments?

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