■ Description

The 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