Silergy SY23421
The SY23421 is a synchronous rectification switcher with high performance capabilities, ideal for use in flyback converters operating in CCM (Continuous Conduction), DCM (Discontinuous Conduction), and QR (QuasiResonant) modes. The SY23421 features a DRAIN high-voltage blanking time detection function that enhances system ESD performance, preventing external noise from false turnon of the SR (Synchronous Rectifier) MOSFET.| Part No. | SY23421 |
|---|---|
| Datasheet | SY23421 Download |
| Manufacturer |  Silergy |
| Description | Secondary Side Synchronous Rectification |
| Buy | Stock & Price |
GENERAL DESCRIPTION
To prevent false turn-on by parasitic ringing under DCM or QR mode, the device uses the DRAIN voltage falling slope rate detection. Under CCM operating mode, it has an extremely short turn-off delay time, while the DRAIN voltage regulation fully utilizes the conduction time of the SR MOSFET for optimizing the efficiency under DCM and QR modes. During light load conditions, the device enters power saving mode to improve light load efficiency.FEATURES
● Suitable for CCM, DCM and QR Mode Flyback Converter● DRAIN Falling Slope Rate Detecting to Avoid False Turn On of SR MOSFET by Parasitic Ring
● DRAIN High Voltage Blanking Time detecting to enhance system ESD performance
● Dual Power Supply Channel for 3.3V to 12V Output Systems
● Compact Package: SO8
APPLICATIONS
● AC/DC Adapters● USB Type-C and Power Delivery AC Adapters
● Server and Telecom Power Supply
● Auxiliary Power Supplies Typical Application CY1 F1 NTC1 L1 AC input C1 C2 R1 R9 R2 T1 C6 US1 SY23421 D1 R4 C...
