UC3875 Datasheet PDF

●DESCRIPTION

●The UC1875 family of integrated circuits implements control of a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other, allowing constant frequency pulse-width modulation in combination with resonant, zero-voltage switching for high efficiency performance at high frequencies. This family of circuits may be configured to provide control in either voltage or current mode operation, with a separate over-current shutdown for fast fault protection.

●FEATURES

●•Zero to 100% Duty Cycle Control

●•Programmable Output Turn-On Delay

●•Compatible with Voltage or Current Mode Topologies

●•Practical Operation at Switching Frequencies to 1MHz

●•Four 2A Totem Pole Outputs

●•10MHz Error Amplifier

●•Undervoltage Lockout

●•Low Startup Current –150µA

●•Outputs Active Low During UVLO

●•Soft-Start Control

●•Latched Over-Current Comparator With Full Cycle Restart

●•Trimmed Reference