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.
Feature
- 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
Applications
- AC/DC adapter
- White goods
- Other SMPS
