TI announces the industry's first zero-standby power PSR solution for high-power AC/DC power supplies

     Texas Instruments has introduced the industry's first zero-standby power controller chip set for AC/DC flyback power supplies at 75W, with the lowest standby power consumption in the industry. TI's new UCC28730 Primary Side Voltage Regulator (PSR) flyback controller features a 700V start switch and UCC24650 wake-up monitor that takes power efficiency to a whole new level. It also supports 5 to 24V output voltages and helps designers create smaller, more efficient power supplies for TVS, home appliances, AC adapters, ventilation, heating and air conditioning (HVAC) systems, and building automation systems.

     The main design limitation of existing primary side regulated power supplies is how to maintain low standby power while still ensuring high transient response performance. The UCC28730 and UCC24650 chip sets provide the best possible transient response performance while achieving zero standby power consumption. Not only does the UCC24650 reduce costs by eliminating the need for feedback components such as optocouplers and TL431, the TI low voltage detection feature in its built-in wake controller also enables the application of miniature output capacitors while maintaining a narrow output voltage regulator window (supporting zero to full load transients).

     The chipset solution is designed to work with TI's ultra-low-power DC/DC converters, sensors, radio frequency (RF) devices, including the SimpleLink CC26xx/CC13xx wireless microcontroller [MCU] platform, and MSP430 MCUS. In order to maintain zero standby power performance of the entire system, while retaining more system functions available in standby mode. The UCC24650 is also compatible with TI's UCC28633 PSR controller, which enables peak power up to twice as high as the rating indicated on the device nameplate without the need to appropriately increase the size of the magnetic components, making it ideal for applications such as printers, audio, gaming, and industrial power supplies.