Texas Instruments UCC25701 Advanced Voltage Mode Pulse Width Modulator UCC25701PWTR

The UCC25701PWTR is an advanced voltage mode pulse width modulator designed for isolated switching power supplies utilizing primary side control. It operates at a frequency of 700 kHz and features integrated voltage feedforward compensation, which allows for accurate duty cycle limits and volt-second clamping. The device supports both off-line applications and DC/DC converter designs, making it suitable for distributed power systems and telecom power sources. This modulator has a low startup current of 130 ¬µA and an operating current of 750 ¬µA, enabling efficient off-line starting. It includes fault protection mechanisms such as pulse-by-pulse current limiting and options for fault latch-off or automatic shutdown after a programmable number of faults. The UCC25701PWTR is available in a 14-pin TSSOP package and operates within a temperature range of -40¬8C to 85¬8C. Engineers may find this product beneficial for applications requiring precise control and protection features in power supply designs.