The FAN6754B is a highly integrated green-mode PWM controller that provides multiple features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency under light-load conditions. Under zero-load and very light-load conditions, FAN6754B saves PWM pulses by entering deep burst mode. This burst mode function enables the power supply to maintain a relatively low switching frequency under light-load conditions, thereby reducing power consumption.
The FAN6754B is a highly integrated PWM controller designed for general-purpose switch-mode power supplies and flyback power converters, such as power adapters. It features a proprietary green-mode function to minimize standby power consumption by modulating off-time and entering deep burst mode under light-load conditions. The device also includes a frequency-hopping function to reduce EMI emissions and synchronized slope compensation to maintain constant output power limits over a universal AC input range.
| Operating Junction Temperature | -40 to +125 °C |
|---|---|
| Operating Ambient Temperature | -40 to +105 °C |
| Gate Output Maximum Voltage Clamp | 13V |
| Brownout Threshold (DC Source Series) | 92 to 112 V |
| Brownout Threshold (DC Source Series) | 104 to 124 V |
| Brownout Hysteresis | 6 to 18 V |
It uses an external NTC thermistor connected from the RT pin to GND to sense the external switcher's temperature.
An internal latch circuit is used to latch-off the controller, which is reset when the Vpp supply is removed.