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UC1879
UC2879
UC3879
www.ti.com SLUS230B – JUNE 1998 – REVISED JUNE 2007 PHASE SHIFT RESONANT CONTROLLER
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 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 …
