UCC28910 Flyback Switcher


TI's 700 V flyback switcher with constant-voltage constant-current and primary-side control

Texas Instruments' UCC28910 is dedicated to isolated flyback power supplies and provides output voltage and current regulation without the use of an optical coupler. The device incorporates a 700 V power FET and a controller that processes operating information from the auxiliary flyback winding and from the power FET to provide precise output voltage and current control.

The integrated high-voltage current source for startup that is switched off during device operation and the controller current consumption that is dynamically adjusted, allows very low stand by power.

Features
  • Constant-Voltage (CV) and Constant-Current (CC) output regulation without optical coupler
  • ±5% output voltage regulation accuracy
  • ±5% output current regulation with AC line and primary inductance tolerance compensation
  • 700 V start-up and smart power management enable best-in-class <30 mW standby power
 
  • 115 kHz maximum switching frequency enables high power density designs
  • Valley switching and frequency dithering to ease EMI compliance
  • Thermal shut down
  • Low-line and output over voltage protection

UCC28910 Flyback Switcher

Manufacturer Part Number Description Available Quantity Datasheets
UCC28910D IC OFF-LINE SWITCH PWM 7SOIC 270
UCC28910DR IC OFF-LINE SWITCH PWM 7SOIC 2192