UCC18500/1/2/3 UCC28500/1/2/3 UCC38500/1/2/3 is a series of BiCMOS PFC/PWM combination controller, which integrates PFC and second stage DC-DC converter function, controls boost PWM to near unity power factor, and has accurate power limiting, average current mode control in PFC stage, peak current mode control in second stage, programmable oscillator, Leading Edge/Trailing Edge modulation to reduce switching loss.
The document describes the Unitrode UCC18500/1/2/3, UCC28500/1/2/3, and UCC38500/1/2/3 family of BiCMOS PFC/PWM combination controllers. These devices combine a Power Factor Correction (PFC) stage with a second-stage DC-to-DC converter to achieve near-unity power factor.
| Supply Current (On) | 4 mA |
|---|---|
| Input Voltage VAOUT | 18V |
| Maximum Duty Cycle (PFC) | 50% |
| Open Loop Gain (Voltage Amplifier) | 80 dB |
| Gain Bandwidth Product | 25 MHz |