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Texas Instruments UCC28811 | Demoboard SLUU423
Isolated 240-W Offline LED Driver Using UCC28810, UCC28811 and TPS92020
Overview
| Topology | Buck Converter |
| Input voltage | 108-265 V |
| Output 1 | 85 V / 3 A |
Description
This driver is comprised of three stages, including PFC stage, Buck stage, and Isolation stage. Both PFCand Buck stage operate in critical conduction mode. The isolation stage is a half-bridge resonant currentconverter with an option to adopt the multi-transformer design. A constant current is controlled by the Buckstage to provide 3 A to the LED strings, with output voltage range from 70 V to 85 V.
Features
- 108 VRMS to 265 VRMS Offline Operation
- Power Factor Correction
- Boost Follower
- Constant Current Control
- Output Isolation
- Onboard or External PWM Dimming
Typical applications
- Street Lighting
- High Bay Lighting