6251DS

■ General Descriptions

The STR-W6200D series products are power ICs for switching power supplies, incorporating a power MOSFET and a current-mode type 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 condition. The product achieves high cost-performance power supply systems with fewexternal components.

■ Features

● Current-Mode Type PWM Control
● PWM with Jittering Function
The function reduces the EMI noise and enables simplified (low-cost) EMI filters.
The jittering period is adjustable by an external capacitor.
● Auto-Standby Function
The burst-oscillation enables the low standby power.
Input Power PIN < 100mW at no load
● Built-in Startup Circuit, enabling low power consumption
● Overcurrent Protection (OCP) with Built-in Input Compensation Circuit
The function has less AC input voltage dependency.
● Overload Protection (OLP) with Built-in Delay Timer ( the delay time is adjustable by an external capacitor)
● External Latch Protection (ELP)
The function enables the latch shutdown by external signal.
● Bias-Assist Function, reducing operating VCC voltage drop
The function improves the startup operation and makes a low VCC capacitor applicable.
● Leading Edge Blanking Function
● Slope Compensation Function
● Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET
● Various Protections
Overcurrent Protection (OCP)---------------------------------- Pulse-by-Pulse
Overload Protection (OLP) ------------------------------------- Auto-Restart
Overvoltage Protection (OVP) --------------------------------- Latch Shutdown
Thermal Shutdown Protection (TSD) ------------------------- Latch Shutdown

■ Applications

Switching Power Supplies for
Home Appliances (White Goods), Digital Consumer Equipment, OA Equipment, Industry Machines, Communication Devices, Others