TI UCC35702PW

The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source.

• 700kHz Operation
• Integrated Oscillator/ Voltage Feed Forward Compensation
• Accurate Duty Cycle Limit
• Accurate Volt-second Clamp
• Optocoupler Interface
• Fault Counting Shutdown
• Fault Latch off or Automatic Shutdown
• Soft Stop Optimized for Synchronous Rectification
• 1A Peak Gate Drive Output
• 130μA Start-up Current
• 750μA Operating Current
• Low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz
• Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range
• An accurate volt-second clamp and maximum duty cycle limit are also featured
• Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has occurred
• Two UVLO options are offered. UCC35701 family has turn-on and turn-off thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V

• Off-line applications
• DC/DC converter designs in a distributed power system architecture
• Telecom power source