SY5040 Datasheet | Silergy

General Description The SY5040 is a peak current mode SSR Flyback controller that bines CCM and QR mode together to minimize transformer size and achieve high efficiency. Under low line and heavy load condition, the SY5040 works under CCM, while under high line or medium load condition, it works under QR mode (valley switching). The SY5040 adopts frequency foldback control when the load decreases to achieve the high average efficiency. When the load decreases to very light level, the SY5040 will enter burst mode and the switching frequency is fixed to 25kHz to avoid audible noise. The SY5040 also provides prehensive and reliable protections including brownout protection, output OVP, external OTP, OLP, VCC OVP, internal OTP, etc. The SY5040 is available with a pact SOT23-6 package. SY5040 CCM+QR Mode SSR Flyback Controller Features - Rated Switching Frequency: 65kHz - CCM+QR bined Operating Mode - Frequency Fold Back and Burst Mode Control - Minimum Switching Frequency Limited to 25kHz - FSW Modulation to Reduce EMI Noise - Programmable Brownout Protection by ZCS Pin - Programmable Output OVP by ZCS Pin - Programmable External OTP by CS Pin - OLP, VCC OVP, Internal OTP - Secondary Diode Short Circuit Protection - OCP pensation over Universal Input Range - Low Start up Current: <4A - Gate Drive Capability: 210mA/420mA(source/sink) - Internal Soft Start Process - RoHS pliant and Halogen Free - pact Package: SOT23-6 Applications - AC/DC Power Supply - Note Book Adapter - LCD TV - Auxiliary Power Supply L VO+...