Power Switch (FPS) Technology Exceeds Energy Star Requirements

Fairchild Semiconductor developed the FSL1x6 series of green-mode Fairchild Power Switch (FPS) devices. These integrated PWM controllers include proprietary green-mode functions that provide off-time modularity to linearly decrease the switching frequency at light-load conditions to minimize standby power consumption.

Integrating pulse width modulation (PWM) and SenseFET technology, the FSL1x6 series is specifically designed for high performance offline switch-mode power supplies while using minimal components. Devices in the FSL1x6 series include integrated high-voltage power switching regulators that combine an internal avalanche-rugged SenseFET (650V) with a current-mode PWM control block, making them ideal for switch-mode power supplies in VCRs, set-top boxes, DVD and DVCD players, home appliances and LED lighting, as well as adapters.

The FSL1x6 series features low standby power, <50mW at 265VAC no-load condition, exceeding worldwide energy regulations and meeting current design needs, as well as the continuing drive for lower standby power consumption. The series also features a precision fixed operating frequency with frequency jittering for attenuating EMI.

The FSL1x6 series offers robust protection features including rugged ESD immunity (HBM: 5KV, CDM: 2KV), under voltage lockout protection, overload protection, output-short protection, abnormal over-current protection and internal thermal shutdown function with hysteresis, with All Auto restart mode. The FSL1x6 series also includes an optimized gate turn-on/turn-off driver, and temperature-compensated precision current sources for loop compensation and fault protection circuitry.