Description

The UCC37322DRG4 is a gate driver used for electronic components. It is specifically designed for implementing off-line, flyback, or forward converters with minimal external components. This current-mode Pulse Width Modulated (PWM) controller provides all the necessary control and protection functions.

Specifications and Features

- Very low start-up supply current; 50 µA typical

- Low operating supply current; 1.2 mA typical

- Accurate, internally-trimmed, fixed frequency oscillator (100 kHz). No external timing components needed

- Internal slope compensation. No external ramp components needed

- Built-in over-voltage and under-voltage detection

- High-speed over-current trip; 170 ns typical

- Over-voltage clamp on supply voltage (VDD)

- Internal divider regulates VDD to 12 V. No external divider needed

- Leading edge blanking of the current sense signal

- Control frequency modulated over a narrow band to reduce Electromagnetic Interference (EMI)

- High output drive capability; 150 ns typical rise and fall time into 2 nF load

- Wide bandwidth (10 MHz) error amplifier with external compensation pin and simple interface to optocoupler

- Accurate internal bandgap reference

Application Scenarios

This gate driver is commonly used in the following applications:

- Off-line switched mode power supplies

- Laptop computer mains adaptors

- Printer power supplies

Comparison