onsemi FAN6300SY

Green-Mode QR PWM Controller for Flyback Converter, Low Frequency below 100KHz

Current Mode PWM Controller 125kHz 8-Pin SOIC N T/R

Highly-Integrated Quasi-Resonant Current Mode PWM Controlle

IC OFFLINE SWITCH FLYBACK 8SOIC

Switching Controller, Current-mode, PDSO8

IC REG CTRLR FLYBK ISO PWM 8-SOP

Current Limiting Open Loop Over Voltage Short Circuit Tape & Reel (TR) R-PDSO-G8 CURRENT-MODE dc ac converter 25V 4.9mm -40C~105C TA

The highly integrated FAN6300 PWM controller provides several features to enhance the performance of flyback converters. 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 improve power consumption. An internal valley voltage detector ensures the power system operates at Quasi-Resonant operation in wide-range line voltage and any load conditions and reduces 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.FAN6300 controller also provides many protection functions. Pulse-by-pulse current limiting ensures the fixed peak current limit level, even when a short circuit occurs. Once an open-circuit failure occurs in the feedback loop, the internal protection circuit disables PWM output immediately. As long as VDD drops below the turn-off threshold voltage, controller also disables PWM output. The gate output is clamped at 18V to protect the power MOS from high gate-source voltage conditions. The minimum tOFF time limit prevents the system frequency from being too high. If the DET pin reaches OVP, internal OTP is triggered, and the power system enters latch-mode until AC power is removed.FAN6300 controller is available in 8-pin SOP and DIP packages.