SY5055 Datasheet | Silergy

Description The SY5055 is a PFC+LLC bo controller, which integrates a Boost PFC controller and a resonant halfbridge controller. The Boost converter works in Cr M/DCM mode to minimize switching losses and get better EMI performance. Proprietary control is adopted to get unity PF and lowest THD. Burst function increases efficiency at low load. Reliable input BO/BI protection, Boost output OVP/UVP, over current protection, Boost feedback protection guarantees safety work. The LLC converter with proprietary control achieves fast dynamic response and easy loop pensation parameters design. The peripheral devices count is greatly reduced to save BOM cost. The SY5055 also has Output OVP, OTP and OLP for safety operation. Ordering Information SY5055- (- - - ) Ordering Number SY5055FFP Package Code Optional Spec Code Package type Note SOP16 ---- 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 Applications - LCD Television - Desktop, All in One PC - Adapter, Charger - Printer Typical Applications D4 L1 D3 F1 L EMI filter Q3 R6 C2 R12 C3...