STRF6656 IC STR F6656 Original Pulled Conductor STR-F6676

Product Overview

As described in the STRF656K.pdf datasheet, this series consists of high-reliability, off-line quasi-resonant flyback switching regulator integrated circuits designed for switched-mode power supplies (SMPS). The IC incorporates a primary control and drive circuit alongside an avalanche-rated power MOSFET on a single chip, achieving low power dissipation and minimal electromagnetic interference (EMI) through soft-switching technology. Highly optimized for applications ranging from televisions and monitors to battery chargers and industrial power units, it features a comprehensive safety suite including cycle-by-cycle current limiting, under-voltage lockout (UVLO) with hysteresis, over-voltage protection (OVP), thermal shutdown, and a low-frequency standby operation mode.

Core Specifications

• Manufacturer: Sanken Electric Co., Ltd.

• Package Type: 5-pin overmolded TO-3P style package (fully isolated)

• Function: Off-Line Quasi-Resonant Flyback Switching Regulator / SMPS Primary Control IC

• Input Voltage: Optimized for 85V to 265V AC universal input lines (with a maximum control supply voltage $V_{IN}$ of 35V DC)

• Control Interface: Direct voltage feedback interface for quasi-resonant synchronization, complemented by built-in latched fault protection circuitry and a low-current startup channel