Texas Instruments UCC28711 Constant-Voltage, Constant-Current PWM Controller with Primary-Side Regulation UCC28711DR

The UCC28711DR is a Constant-Voltage, Constant-Current PWM controller designed for power supply applications, featuring primary-side regulation that eliminates the need for an opto-coupler. It operates with a maximum switching frequency of 100 kHz and includes an internal 700-V start-up switch, enabling high power density designs. The device supports ultra-low standby power consumption of less than 10 mW while maintaining efficient output transient response. This controller provides ±5% voltage and current regulation across varying line and load conditions. It incorporates resonant valley-switching operation to enhance overall efficiency and includes protection features such as overvoltage, low-line, and overcurrent protection. The UCC28711 also allows for remote temperature sensing through a negative temperature coefficient (NTC) resistor, providing fixed cable compensation levels. It is packaged in a 7-pin SOIC format and is suitable for applications including USB-compliant adapters, chargers for consumer electronics, and standby supplies for various devices.