SY5955 Datasheet | Silergy

Description The SY5955 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 SY5955 also has Output OVP, OTP and OLP for safety operation. Ordering Information - (- - )- Temperature Code Package Code Optional Spec Code Ordering Number SY5955FFP Package type Note SOP16 ---- Features - PF>0.95, THD<5% - Boost Quasi Resonant (QR) Operation - Boost Burst Operation at Light Load - LLC Fast Dynamic...