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UC1875-SP Datasheet Phase Shift Resonant Controller

Manufacturer: Texas Instruments

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General Description

The UC1875-SP 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 circuit may be configured to provide control in either voltage or current mode operation, with a separate overcurrent shutdown for fast fault protection.

A programmable time delay is provided to insert a dead-time at the turn-on of each output stage.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UC1875-SP SLUSAQ9B – DECEMBER 2011 – REVISED DECEMBER 2015 UC1875-SP Rad-Tolerant Class-V, Phase Shift Resonant Controller.

Key Features

  • 1 QML-V Qualified, SMD 5962-94555.
  • Rad-Tolerant: 50 kRad (Si) TID (1).
  • Zero to 100% Duty Cycle Control.
  • Programmable Output Turn-On Delay.
  • Compatible with Voltage or Current Mode Topologies.
  • Practical Operation at Switching Frequencies to 1 MHz.
  • Four 2-A Totem Pole Outputs.
  • 10-MHz Error Amplifier.
  • Undervoltage Lockout (UVLO).
  • Low Startup Current.
  • 150 µA.
  • Outputs Active Low During UVLO.

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