Texas Instruments DC DC Switching Controllers UCC25701D/81385

The UCC25701D is a voltage mode pulse width modulator designed for isolated switching power supplies, suitable for both off-line applications and DC/DC converter designs. It operates at a frequency of 700 kHz and features integrated voltage feedforward compensation, which allows for accurate response to input voltage changes across a 5:1 input range. The device includes a peak gate drive output of 1A, a low start-up current of 130 µA, and an operating current of 750 µA. Key protective features include accurate duty cycle limits, a volt-second clamp, and fault counting shutdown capabilities, which can latch off or automatically shut down after a specified number of faults. The UCC25701D supports soft stop functionality and is optimized for synchronous rectification. It is available in multiple package options, including 14-pin SOIC, PDIP, and TSSOP, making it versatile for various applications. The device also offers two under-voltage lockout (UVLO) options with different turn-on and turn-off thresholds.