Description

The FA13844N is a CMOS current mode control IC for off-line and DC-to-DC converters. It is part of the FA1384X series, which is designed to reduce start-up circuit loss and provide high efficiency power supplies through changes in the CMOS fabrication process. This IC can drive a power MOSFET directly, and allows for the design of a high-performance, compact power supply with minimal external components.

Specifications and 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

Application Scenarios

The FA13844N IC is suitable for a variety of application scenarios, including off-line and DC-to-DC converters. It can be used in power supply designs that require high efficiency and minimal external components. Its CMOS process and low-power dissipation make it an optimal choice for reducing circuit loss and achieving energy-saving power supplies.

Comparison

- Reduction in start-up circuit loss
- High efficiency power supplies
- Low power dissipation
- Direct drive capability for power MOSFET
- Compact power supply design with minimal external components

- Limited maximum duty cycle (48% for FA13844N)
- Specific pin compatibility with UC384X