Overview
The UC1851 family of PWM controllers is designed for off-line primary side control. These devices feature a high current totem pole output stage, toggle flip-flop for 50% duty cycle limiting, and a range of housekeeping functions.
Key Features
Low current off-line start circuit
Voltage feed-forward or current mode control
Programmable start threshold, over-voltage, under-voltage, and over-current fault thresholds
Pulse-by-pulse current limiting and shutdown for over-current faults
Slow turn-on and shutdown transients
1% reference accuracy and 500kHz operation
Applications
These devices are ideal for cost-sensitive applications, including off-line power supplies and DC-DC converters.
Manual:
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