Off-Line PWM Controllers with Integrated Power MOSFET
STR3A400HDL Series
Data Sheet
Description
The STR3A400HDL series...
Off-Line PWM Controllers with Integrated Power
MOSFET
STR3A400HDL Series
Data Sheet
Description
The STR3A400HDL series are power ICs for switching power supplies, incorporating a
MOSFET and a current mode PWM controller IC.
The low standby power is accomplished by the automatic switching between the PWM operation in normal operation and the burst-oscillation under light load conditions. The product achieves high costperformance 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) ● Noise Reduction ● Current Mode Type PWM Control ● Soft Start Function ● Automatic 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 Two Types of Overcurrent Protection (OCP): Pulseby-Pulse, built-in compensation circuit to minimize OCP point variation on AC input
voltage Overload Protection (OLP): Auto-restart Over
voltage Protection (OVP): Auto-restart Thermal Shutdown (TSD): Auto-restart with hysteresis
Typical Application
VAC
BR1 C1
C4
C5
8
7
6
5
D/ST D/ST DN/SCT D/ST
U1
STR3A...