CM6301

CM6301 Quasi-Resonant smps controller DESCRIPTION Quasi-resonantzero-voltageswitching (ZVS) topology. Ripple reduction during light to moderate load while minimizing the range of operating frequency. Ultra-low start up current and operating current. Soft Start Green-Mode operation The CM6301 is a current-mode primary controller specifically tailored for offline Quasi-resonant ZVS fly-back converters. Load detect function minimizes the range of operating frequency during light to moderate load while reducing output ripple. APPLICATIONS TV/Monitor SMPS AC-DC Adapters/Chargers BLOCK DIAGRAM . 5uA Reset Dominsnt . . . 4 I+V SS 2 UV . PFC OVP - 0.5V + + + . . . MUX. . 1.5V 1.0V CLAMP SQ RQ DNESHDT OUT IN OUTB . . DRV . 2V . MUX. 1V . PWMOUT 7 . 5uA ZCD 5 2.0/1.5V . + . . - VCC 8 15/10V . + . . - VCC .. . 40uA QR S . + . - . + . - CTIMER 0.5V 3 VIN-OK 1 GND 6 . VREG . .. . . .. DNESHDT INOUT . DS1 PWMOUT .. 16/16.5V . + . - VCCOVP DS1 DS2B 2004/01/07...