Silergy SY22650B
The SY22650B is a single-stage flyback and PFC controller designed for constant voltage (CV) applications. It uses primary-side control to reduce the total solution cost, constant on-time control to achieve a high power factor, and drives the flyback converter in quasi-resonant mode for high efficiency. The device also employs adaptive PWM/PFM control for improved lightload efficiency.| Part No. | SY22650B |
|---|---|
| Datasheet | SY22650B Download |
| Manufacturer |  Silergy |
| Description | Single-Stage Flyback and PFC Controller |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The SY22650B provides reliable protections including short-circuit protection (SCP), open-LED protection (OLP), overtemperature protection (OTP), transformer shorted protection, and power diode shorted protection. The SY22650B is available in a compact SO8 package.FEATURES
● 9V to 22V Input Voltage Range● 0.45mA (typ.) Quiescent Current IQ
● Primary-Side Constant Voltage Control Eliminates the Optocoupler
● Valley Turn-On of the Primary MOSFET for Low Switching Losses
● Internal High Current MOSFET Driver: 0.1A Sourcing and 0.5A Sinking
● Power Factor >0.90 with Single-Stage Conversion
● 100kHz Maximum Switching Frequency
● Quick Startup: <500ms
● Output Current Limit of Approximately 1.2x the Rated Current
● RoHS-Compliant and Halogen-Free
● Compact Package: SO8
APPLICATIONS
● AC/DC Adapters● Battery Chargers
● LED Lighting Typical Application DB1 AC input C1 T1 C2 R1 NP D2 D1 NS C3 output R2 R3 Q1 SY22650B 5 DRV GND 4 D3 6 VIN ISEN 3 R8 CY1 R5 NAUX C4 7 VSEN C6 CLIM 2 R4 R6 8 NC COMP 1 R7 C6 C5 Figure 1.
