This application note describes a complete flyback switched mode power supply that uses a Fairchild Power Switch. The MOSFET and its control IC are built into one package. The MOSFET is in fact a SenseFET. Various protection features are also included. Fairchild Power Switch can enhance the reliability and productivity of the system when compared to other designs. The FS6M series has a more avalanche rugged SenseFET than the previous Fairchild Power Switch series. The FS6M series features include burst mode operation for low power consumption in DPMS mode. This application note describes the features and design considerations of the FS6M series for the LCD monitor power supply and adaptor, which improves upon the existing KA5X-series.
The document details the FS6M series Fairchild Power Switch (FPS), which integrates a MOSFET and control IC into a single package. It highlights features such as burst mode operation for DPMS, internal protection circuits, and suitability for LCD monitor power supplies and adaptors. The note compares the FS6M series to previous KA5X-series designs, noting improvements in avalanche ruggedness and low power consumption.
| Absolute Voltage Rating | 650V |
|---|---|
| Absolute Current Rating | 7A or 12A |
| Switching Frequency (Burst Mode) | 70kHz |
| Input Voltage Range | 80 ~ 265V (Ac) |
| Start Voltage (Vcc) | 15V |
| Operating Current (Normal) | 10mA |
| Over Voltage Protection Trigger | 33V |
| Minimum Vcc for Restart | 9V |
The FS6M series enters burst mode with a switching frequency of 70kHz.
The input voltage range is 80 to 265V AC.
The over voltage protection feature is triggered when the Vcc exceeds 33V.
Protection circuits become deactivated when Vcc falls below 9V.