UC2879 - Texas Instruments

UC2879 PHASE SHIFT RESONANT CONTROLLER

The UC3879 controls a bridge power stage by phase shifting the switching of one half-bridge with respect to the other. This allows constant frequency pulse width modulation in combination with resonant, zero-voltage switching for high efficiency performance. The UC3879 can be configured to provide control in either voltage mode or current mode operation, wit.

Features

• Programmable Output Turn On Delay; Zero Delay Available
• Compatible with Voltage Mode or Current Mode Topologies
• Practical Operation at Switching Frequencies to 300 kHz
• 10-MHz Error Amplifier
• Pin Programmable Undervoltage Lockout
• Low Startup Current
  – 150 µA
• Soft Start Control
• Outputs Active Low During UVLO BLOCK DIAGRAM DESCRIPTION The UC3879 controls a bridge power stage by phase shifting the switching of one half-bridge with respect to the other. This allows constant frequency pulse width modulation in combination with resonant, zero-voltage switching for high efficiency per.