STR-W6750
Overview
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 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.
- 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 kHz, until the quasi-resonant signal becomes valid, reduces the stress on components 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 Compensation at Overcurrent The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three components. Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET Various Protections Overcurrent Protection (OCP) Pulse-by-Pulse Over
