STR3A475HDL
STR3A475HDL is Off-line PWM Controllers manufactured by Sanken.
Off-line PWM Controllers with Integrated Power MOSFET
Data Sheet
Description
The STR3A475HDL is power IC for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC.
The low standby power is acplished by the automatic switching between the PWM operation in normal operation and the burst-oscillation under light load conditions. The product achieves high cost-performance power supply systems with few external ponents.
Features
- Bare Lead Frame: Pb-free (Ro HS pliant)
- 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 <15 m W
- Operation Mode Normal Operation ---------------------------- PWM Mode Light Load Operation------------------------Green-Mode Standby --------------------------- Burst Oscillation Mode
- Random Switching Function
- Slope pensation Function
- Leading Edge Blanking Function
- Bias Assist Function
- Protections Two Types of Overcurrent Protection (OCP): Pulse-by-Pulse, built-in pensation circuit to minimize OCP point variation on AC input voltage Overload Protection (OLP): Auto-restart Overvoltage Protection (OVP): Auto-restart Thermal Shutdown (TSD): Auto-restart with hysteresis
Typical Application
BR1 C1
C4
C5
D/ST D/ST DN/SCT D/ST
U1
STR3A400HDL
S/OCP VCC GND FB/OLP 1234
T1
D51
R1...
