FAN6300A/H is a highly integrated quasi-resonant current mode PWM controller from Fairchild Semiconductor. It is suitable for low frequency (below 100kHz) quasi-resonant flyback converters and high frequency (up to 190kHz) flyback converters. The device features high-voltage startup, quasi-resonant operation, cycle-by-cycle current limiting, peak-current-mode control, leading-edge blanking (LEB), internal minimum tOFF, internal 5ms soft-start, over power compensation, GATE output maximum voltage, auto-recovery over-current protection (FB pin), auto-recovery open-loop protection (FB pin) VDD pin and output voltage (DET pin) OVP latched function.
The Fairchild Semiconductor FAN6300A and FAN6300H are highly integrated PWM controllers designed to enhance the performance of flyback converters. The FAN6300A is optimized for quasi-resonant operation with a maximum frequency below 100kHz, while the FAN6300H supports high-frequency operation up to 190kHz. Both devices feature a built-in high-voltage startup circuit, cycle-by-cycle current limiting, and various protection functions including over-power compensation and auto-recovery over-current protection.
| Operating Ambient Temperature | -40 to +125 °C |
|---|---|
| Maximum Operating Frequency (FAN6300H) | up to 190kHz |
| Maximum Operating Frequency (FAN6300A) | below 100kHz |
| Gate Output Clamping Voltage | 18V |
| Minimum Off-Time (FAN6300A) | 38us to 8us |
| Minimum Off-Time (FAN6300H) | 13us to 3us |
The FAN6300H is suitable for high-frequency operation up to 190kHz.
The FAN6300A is applied on quasi-resonant flyback converters where the maximum operating frequency is below 100kHz.
If the DET pin triggers OVP, internal OTP is triggered and the power system enters latch-mode until AC power is removed.