UCC28911DR

The UCC28911DR from Texas Instruments is a high-voltage flyback switcher designed for efficient power conversion. It provides both Constant-Voltage (CV) and Constant-Current (CC) output regulation, eliminating the need for an optical coupler. This device integrates a 700-V power FET and controller, processing information from the flyback auxiliary winding and power FET to achieve precise output control.

Key electrical specifications include an input voltage range of 6.5V to 30V and an output voltage range of 3.3V to 18V, with a maximum output current of 0.7A. The switching frequency can be adjusted from 420 Hz to a maximum of 115 kHz, supporting high-power density designs. The device boasts ±5% output voltage regulation accuracy and ±5% output current regulation accuracy, compensating for AC line and primary inductance variations.

Designed for reliability and efficiency, the UCC28911DR includes features such as thermal shutdown, low line and output over-voltage protection, and current limiting. It supports standby power consumption below 30 mW. The component is housed in a 7-SOIC package and is suitable for surface mounting.

Applications for the UCC28911DR include bias power for home and building automation, smoke alarms, fire alarms, thermostats, wall adapters, mobile phone chargers, smart plugs, IoT devices, MCU and WiFi power supplies, auxiliary power for TVs and servers, and LED lighting.