The UC1823 family of PWM control ICs are optimized for high fre- quency switched mode power supply applications with 50ns propagation delay, 1.5A peak current and 5.1V bandgap reference voltage.
This document provides technical specifications and application information for the UNITRODE UC1823, UC2823, and UC3823 High Speed PWM Controllers. These integrated circuits are designed for use in either current-mode or voltage-mode systems with the capability for input voltage feed-forward. Key features include compatibility with various topologies, practical operation up to 1.0MHz switching frequencies, and a high current totem pole output capable of 1.5A peak current.
| Switching Frequency | 1.0MHz |
|---|---|
| Output Current Peak | 1.5A |
| Propagation Delay | 50ns |
| Reference Voltage | 5.1V |
| Supply Voltage Range | 0V to 30V |
| Storage Temperature Range | -65°C to +150°C |
| Unity Gain Bandwidth | 3 to 5.5 MHz |
| Slew Rate | 6 to 12 V/us |
The controllers support practical operation at switching frequencies up to 1.0MHz.
The high current totem pole output can source or sink a peak current of 1.5A.
The device features a trimmed bandgap reference with a typical output voltage of 5.1V.