SY5231ABC

Silergy
Secondary Side Synchronous Rectification
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Технические характеристики

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Корпус SOT236
Максимальная рабочая частота
Топология
Напряжение питания
Максимальное напряжение шины
Максимальный ток драйвера (нарастание)
Максимальный ток драйвера (спад)
Рабочая температура
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Application Note: SY5231 Secondary Side Synchronous Rectification Features General Description • Suitable for CCM, DCM and QR Mode Flyback Converter SY5231 is a high-performance synchronous rectification controller which is suitable for CCM, DCM and QR mode flyback converter. It can drive standard and logic-level Nchannel MOSFET for secondary-side synchronous rectification. • DSEN Pin Sensing up to 200V • DSEN Falling Slope Rate Detecting to Avoid False Turn On of SR MOSFET by Parasitic Ring SY5231 adopts DSEN voltage falling slope rate detecting technology to avoid SR MOSFET false turn on by parasitic ring under DCM or QR mode. • DSEN High Voltage Blanking Time detecting to enhance system ESD performance • Dual Power Supply Channel for 3.3V to 21V Output Systems SY5231 adopts DSEN high voltage blanking time detective to enhance system ESD performance, it can prevent external noise false turn on SR MOSFET by making fast VDSEN falling slope rate. • Maximum Allowed Switching Frequency Up to 500kHz SY5231 features extremely short turn off delay time under CCM operating mode. Meanwhile, it uses DSEN voltage regulation technology to fully utilize conducting time of SR MOSFET for high efficiency under DCM or QR mode. • 10 ns Typical Turnoff Propagation Delay Under light load condition, SY5231 will enter power save mode to improve light load efficiency. Applications • 2A Sink, 0.5A Source Gate Driver Capability • Compact Package: SOT23-6 • • • • The SY5231 is available in a SOT23-6 package. AC/DC Adapters USB Type-C and Power Delivery AC Adapters Server and Telecom Power Supply Auxiliary Power Supplies Typical Application Vo VOUT L C3 C1 N DP R8 RS7 C2 CS1 CS7 CS2 DN GND D2 D1 BD1 QS1 USB RS9 CS4 COMP HV COMP CS RS5 RS2 CS6 RS8 R5 Q1 GATE C4 R6 RS1 COMP US2 RS3 VCC C5 VDD GATE CS3 R4 GND RS4 LE01 REG VSEN SY5231 R2 VIN US1 U1 GND R3 DSEN Vo R1 CY1 R9 QS2 R7 RS6 Fig. 1 Typical Application Circuit (SR MOSFET location: Low Side) AN_SY5231 Rev.0.9 © 2022 Silergy Corp. 1 All Rights Reserved. PDF
Документация на SY5231ABC 

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Дата модификации: 24.12.2023

Размер: 1.01 Мб

14 стр.

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