This document introduces the improved versions of UC3823A and UC3823B and UC3825A and UC3825B family PWM controllers, which have improved performance, including higher switching frequency (up to 1MHz), shorter propagation delay (50ns), higher output current (2A peak) and lower startup current (100μA).
The document describes the UC3823A, UC3823B, UC3825A, and UC3825B family of Pulse Width Modulation (PWM) controllers. These devices are improved versions of the standard UC3823 and UC3825 families, featuring enhancements such as a 12 MHz error amplifier gain bandwidth product and pulse-by-pulse current limiting.
| Error Amplifier Gain Bandwidth Product | 12 MHz |
|---|---|
| Input Offset Voltage | 2 mV |
| Current Limit Threshold Tolerance | 5% |
| Oscillator Discharge Current | 10 mA |
| Startup Supply Current (Typical) | 100 µA |
| Output Peak Current | 2-A |
The device supports practical operation at switching frequencies up to 1 MHz.
Yes, the latched overcurrent comparator includes a full cycle restart with a delay.