Descriptions

IRIS-G6653 is a hybrid IC consists from power MOSFET and a controller IC, designed for 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.

Features

• Oscillator is provided on the monolithic control with adopting On-Chip Trimming technology.

• Small temperature characteristics variation by adopting a comparator to compensate for temperature on the control part.

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

• Built-in Active Low-Pass Filter for stabilizing the operation in case of light load

• Avalanche energy guaranteed MOSFET with high VDSS

• The built-in power MOSFET simplifies the surge absorption circuit since the MOSFET guarantees the avalanche energy.

• No VDSS de-rating is required.

• Built-in constant voltage drive circuit

• Built-in soft drive circuit

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

• Various kinds of protection functions

   • Pulse-by-pulse Overcurrent Protection (OCP)

   • Overvoltage Protection with latch mode (OVP)

   • Thermal Shutdown with latch mode (TSD)