Description

The SQ6601PT is a hybrid IC consists from power MOSFET and a controller IC, designed for Indirect feed-back Quasi-Resonant (including low frequency PRC)fly-back converter type SMPS (Switching Mode Power Supply) applications. this IC realizes high efficiency, low noise, downsizing and standardizing of a power supply system reducing external components count and simplifying the circuit designs. the device is provided in a five pin over-molded TO-220 style package, affording dielectric isolation without compromising thermal characteristics. (Note). PRC is abbreviation of “Pulse Ratio Control” (On-width control with fixed OFF-time).

Features

• Quasi-Resonant Operation

• Low-loss, Pulse-Ration-Control standby mode

• Under-voltage lockout with Hysteresis

• Adjustable switching speed for EMI control

• Low start-up circuit current (100uA max)

• Active low-pass filter for stabilizing the operation in case of light load

• Avalanche Energy Guaranteed MOSFET with high VDSS

• Built-in constant voltage drive circuit

• Built-in step drive circuit

• Built-in low frequency PRC mode (≒20kHz)

• Pulse-by-pulse Overcurrent Protection (OCP)

• Overvoltage Protection with latch mode (OVP)

• Thermal Shutdown with latch mode (TSD)

• Over-molded Five-Pin Package