UCC2960
UCC2960 is Primary-Side Startup Controller manufactured by Unitrode.
- Part of the UCC3960 comparator family.
- Part of the UCC3960 comparator family.
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D Operates With Secondary-Side PWM
Control
D Receives Isolated PWM mand Through a Pulse-Edge-Transformer
D Initial Free-Running Soft-Start Up 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)
D Overcurrent Protection D Undervoltage Lockout with 2-V Hysteresis D Low-Current Startup
UCC2960, UCC3960 PRIMARYĆSIDE STARTUP CONTROLLER
SLUS430A
- APRIL 1999
- REVISED DECEMBER 2000 typical operating circuit
UCC3960
2 FB
FEED BACK
1 SS
VDD 8 REF 4
SOFT START
OUT 7
3 RT
FREQ SET
CS 5 GND 6
UDG- 99010 description
Figure 1
The UCC3960 primary-side startup controller is a unique solution that...
