UC1823 UC2823 UC3823 is a high-performance PWM controller that is compatible with voltage or current-mode topologies. It has a 1.0MHz switching frequency, 50ns output propagation delay, 1.5A peak current, wide-bandwidth error amplifier, double pulse suppression, pulse current limiting, soft start/max. Duty Cycle Control, Hysteresis Under-Voltage Lockout, Low Start Up Current (1.1mA), Trimmed Bandgap Reference (5.1V ±1%).
The UC1823 family of high‑speed PWM controller ICs is optimized for switched‑mode power‑supply applications. The devices feature a 50 ns propagation delay, a 1.5 A peak totem‑pole output, wide‑bandwidth error amplifier, under‑voltage lockout with hysteresis, and soft‑start control. They are available in DIL‑16, SOIC‑16, PLCC‑20 and LCC‑20 packages.
The datasheet includes detailed electrical characteristics (supply voltage up to 30 V, start‑up current as low as 1.1 mA, UVLO threshold 8.8‑9.6 V), connection diagrams, thermal packaging data, PCB layout recommendations, oscillator and constant volt‑second clamp circuits, as well as synchronized operation guidelines for multiple units.
| Propagation Delay to Output | 50 ns |
|---|---|
| Maximum Output Current (Totem‑Pole) | 1.5 A peak |
| Start‑up Current | 1.1 mA (low start‑up) |
| Operating Temperature Range | -55 °C to +125 °C (UC1823) |
The propagation delay to the output is 50 ns.
It can source or sink up to 1.5 A peak through its totem‑pole output.