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 mA
· 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 efficiency
performance. The UC3879 can be configured to
provide control in either voltage mode or current
mode operation, with overcurrent shutdown for fast
fault protection.
Independently programmable time delays provide
dead-time at the turn-on of each output stage,
allowing time for each resonant switching interval.