UCC2961
UCC2961 is Advanced Primary-Side Startup Controller manufactured by Unitrode.
ą UCC2961, UCC3961 ADVANCED PRIMARYĆSIDE STARTUP CONTROLLER
D Operates with Secondary- Side PWM
Control
D Isolated PWM mand through a Pulse
Transformer
D Initial Free-Running Soft-Startup with
Duty-Cycle Clamping
D Up to 400-kHz Synchronizable Switching
Frequency
D High-Current FET Drive (1.5-A Sink, 0.75-A
Source)
SLUS431A
- MAY 2000
- REVISED DECEMBER 2000
D Multi-Mode Overcurrent Protection with
Restart, Latching, or Cycle-by-Cycle Current Limiting
D Programmable Volt-Second Clamp for
Transformer Reset
D Undervoltage Lockout with 2-V Hysteresis D Low-Current Startup with Optional
Disconnect
D Programmable Overvoltage and
Undervoltage Protection
D 8- pin Version Also Available...
