SY5055 Overview
The SY5055 is a PFC+LLC bo controller, which integrates a Boost PFC controller and a resonant halfbridge controller. The Boost converter works in CrM/DCM mode to minimize switching losses and get better EMI performance. Proprietary control is adopted to get unity PF and lowest THD.
SY5055 Key Features
- PF>0.95, THD<5%
- Boost Quasi Resonant (QR) Operation
- Boost Burst Operation at Light Load
- LLC Fast Dynamic Response
- LLC Integrated Half-bridge Driver
- Input BO/BI Protection
- Boost Output, LLC Output OVP
- Cycle by Cycle Peak Current Protection
- Over Temperature Protection
- LLC Capacitive Mode Protection