This document describes the features and characteristics of the UCC2808A, a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC2808A is qualified for automotive applications and supports customer-specific configuration control and major-change approval. It provides ESD protection exceeding 1500 V per MIL-STD-883, Method 3015, and exceeds 200 V using the Machine Model (C = 200 pF, R = 0). The UCC2808A features dual output drive stages in a push-pull configuration, a current sense discharge transistor to improve dynamic response, a typical starting current of 130 µA, and a typical run current of 1 mA. It can operate up to 1 MHz and has internal soft start. The on-chip error amplifier has a 2-MHz gain bandwidth product, and on-chip VDD clamping is provided. The output drive stages are capable of 500-mA peak-source current and 1-A peak-sink current.
The UCC2808A-1Q1 is a BICMOS push‑pull, high‑speed, low‑power PWM controller designed for current‑mode switching power supplies. It integrates the error amplifier, oscillator, and dual output drive stages, allowing operation with minimal external components.
The document lists ordering information, detailed pin functions, electrical characteristics, mechanical dimensions, and typical application circuits. Key features include 500 mA peak source and 1 A peak sink output capability, programmable oscillator using only a resistor and capacitor, and an internal discharge transistor on the CS pin for fast dynamic response.
| Oscillator frequency | 175 kHz (min) – 213 kHz (max) |
|---|---|
| Peak source current per output | 500 mA |
| Peak sink current per output | 1 A |
| Output low‑level current | 100 mA |
| Over‑current threshold | 0.65 V (min) – 0.85 V (max) |
Only two external components – a resistor and a capacitor – are required to set the oscillator frequency.
It discharges the filter capacitor on the CS pin each clock cycle, improving dynamic performance.