STRW6750 Datasheet | Sanken

STR-W6700 - General Descriptions Series Power IC for Quasi-Resonant Type Switching Power Supply with High Efficiency and Low Noise in Full Load Range The STR-W6700 series products are power ICs for quasi-resonant type switching power supplies, incorporating a power MOSFET and a controller IC, The product achieves high ..net efficiency and low noise power supply systems by the quasi-resonant operation and the bottom-skip quasi-resonant operation. The STR-X6700 series products are the different package (TO-3PF) versions. - Features Multi-Mode Control The operation mode switching with three steps according to load conditions achieves the TO-220F-6 optimal high efficiency and low noise power supply systems across the full load range. (The confirmation of product number is necessary because some functions are different in each product.) - In Standby (Under Standby Load Conditions): －UVLO Intermittent Oscillation by lowering output voltage --- Switched by Standby Signal, or －Auto Burst-Oscillation --- Switched Automatically - Under Low to Middle Load Conditions: Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR) - Under Middle to Rating (or Heavy) Load Conditions: Quasi-Resonant Operation (QR) Current-Mode Control Built-in PWM Oscillator The PWM operates with the minimum frequency of around 22 k Hz, until the quasi-resonant signal bees valid, reduces the stress on ponents at startup and load-shorted. Soft-Start Function Step-Drive Function, reducing switching noise Built-in Maximum ON Time Limitation Circuit The function limits the maximum ON time of power MOSFET, during the transitions at low input voltage, power ON/OFF. Input pensation at Overcurrent The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three ponents. Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET Various Protections Overcurrent Protection (OCP) -------------------------------- Pulse-by-Pulse Overload...