SY5040 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.
SY5040 Key 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