FAN6300A
features to enhance the performance of flyback converters. FAN6300A is applied on quasiresonant flyback converters where maximum operating frequency is below 100 k Hz. FAN6300H is suitable for high- frequency operation (up to 190 k Hz). A built- in HV startup circuit can provide more startup current to reduce the startup time of the controller. Once the VDD voltage exceeds the turn- on threshold voltage, the HV startup function is disabled immediately to reduce power consumption. An internal valley voltage detector ensures power system operates at quasi- resonant operation over a wide- range of line voltage and any load conditions, as well as reducing switching loss to minimize switching voltage on drain of power MOSFET.
To minimize standby power consumption and light- load efficiency, a proprietary green- mode function provides off- time modulation to decrease switching frequency and perform extended valley voltage switching to keep to a minimum switching voltage. The operating frequency is...
