UCC35701D

The UCC35701D from Texas Instruments is an advanced voltage mode pulse width modulator (PWM) controller designed for isolated switching power supplies. It is suitable for both off-line applications and DC/DC converter designs, including distributed power systems and telecom power sources.

This IC features a wide input voltage range of 9V to 15V and operates at a frequency of 700kHz. Key electrical characteristics include a 99% duty cycle, a startup voltage of 13V, and integrated fault protection with current limiting. The device also supports control features like soft start and synchronization.

The UCC35701D is available in a 14-SOIC package and is designed for surface mount applications. Its operating temperature range is -55°C to 150°C (TJ). The component is intended for use in topologies such as Boost, Buck, Flyback, and Forward converters, providing isolated output.

This device offers features like voltage feed-forward compensation, an accurate volt-second clamp, and a maximum duty cycle limit. It also includes an optocoupler interface and fault counting shutdown capabilities, with options for latch-off or automatic shutdown. The soft-stop feature is optimized for synchronous rectification.