■ DescriptionThe FA1384X series are CMOS current mode control ICs for off-line and DC-to-DC converters.These ICs can reduce start-up circuit loss and are optimum for high efficiency power supplies because of the low power dissipation achieved through changes in the CMOS fabrication process.These ICs can drive a power MOSFET directly.The high-performance, compact power supply can be designed with minimal external components .

■ Features• CMOS process• Low-power dissipation• Standby current 2µA (max.), start-up current 30µA (max.)• Pulse-by-pulse current limiting• 5V bandgap reference• UVLO (Undervoltage lockout) with hysteresis• Maximum duty cycle FA13842, 13843: 96% FA13844, 13845: 48%• Pin-for-pin compatible with UC384X