UCC2895-Q1

UCC2895-Q1 www.ti.com SLUS783C – MAY 2008 – REVISED AUGUST 2012 BiCMOS ADVANCED PHASE-SHIFT PWM CONTROLLER Check for Samples: UCC2895-Q1 FEATURES 1 Qualified for Automotive Applications Programmable Output Turn-On Delay Bidirectional Oscillator Synchronization Voltage-Mode, Peak-Current-Mode, or Average-Current-Mode Control Programmable Soft Start/Soft Stop and Chip Disable Via a Single Pin 0% to 100% Duty-Cycle Control 7-MHz Error Amplifier Operation to 1 MHz Typical 5-mA Operating Current at 500 kHz Very Low 150-μA Current During Undervoltage Lockout (UVLO) APPLICATIONS Phase-Shifted Full-Bridge Converters Off-Line, Telecom, Datacom, and Servers Distributed Power Architecture High-Density Power Modules DESCRIPTION The UCC2895-Q1 is a phase-shift pulse-width modulation (PWM) controller that implements control of a full-bridge power stage by phase shifting the switching of one half-bridge with respect to the other. It allows constant-frequency PWM in conjunction with resonant zero-voltage switching to provide high efficiency at high frequencies. The device can be used either as a voltage-mode or current-mode controller. Although the UCC2895-Q1 maintains the functionality of the UC3875/6/7/8 family and UC3879, it improves on that controller family with additional features such as enhanced control logic, adaptive delay set, and shutdown capability. Because it is built using the BCDMOS process, it operates with dramatically less supply current th...