FAN6747WALMY is a highly integrated green-mode PWM controller that offers various features and functions, including high-voltage startup, AC-line brownout protection, constant output power limit, built-in soft-start function, leading-edge blanking, short-circuit protection, and more.
The FAN6747WALMY is a highly integrated PWM controller designed for general-purpose switched-mode power supplies (SMPS) and flyback power converters. It features a proprietary Green-Mode function that decreases switching frequency under light loads to minimize standby power consumption, helping meet international power conservation requirements. The device incorporates peak-current mode operation with cycle-by-cycle current limiting and includes an internal latch circuit for various protection events.
Key features include high-voltage startup, AC-line brownout protection, constant output power limit adjustment via the HV pin, and over-temperature protection using an external NTC thermistor. The controller also offers short-circuit protection with a 15ms debounce time and over-voltage protection (OVP). The gate output is internally clamped to protect external MOSFETs from over-voltage damage.
| Operating Junction Temperature | -40 to +125 °C |
|---|---|
| Storage Temperature Range | -55 to +150 °C |
| Low Startup Current | 30uA |
| Low Operating Current | 1.7mA |
| Short-Circuit Protection Debounce Time | 15ms |
| Over-Temperature Protection Threshold | NTC Thermistor |
| Vop Continuously Operating Voltage | 24 V |
| Vop-on Turn-On Threshold Voltage | 17 V |
| Gate Output Clamp Voltage | 14V |
The HV pin provides high-voltage startup, AC-line brownout protection, and allows for constant output power limiting across the full AC-line range.
The device is rated for an operating junction temperature range of -40 to +125 °C.