UCC2884 Overview
The UCC3884 is a high performance current mode PWM controller intended for single ended switch mode power supplies. The chip implements a frequency foldback scheme that decreases the oscillator frequency as the output voltage falls below a programmed value. This technique decreases the average output current sourced into a low impedance load which can occur during an output short circuit or overload condition.
UCC2884 Key Features
- Frequency Foldback Reduces Operating Frequency Under Fault Conditions
- Accurate Programmable Volt-Second Clamp
- Programmable Maximum Duty Cycle Clamp
- Oscillator Synchronization
- Overcurrent Protection
- Shutdown With Full Soft Start
- Wide Gain Bandwidth Amplifier (GBW > 2.5
- Current Mode Operation
- Precision 5-V Reference