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.

• 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