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  • SC3503SBER

  • SC3503SBER

    SC3503 is a smart secondary-side driver IC designed to
    drive N-Channel power MOSFET used as synchronous
    rectifiers in isolated flyback converters. The MOSFET can
    replace Schottky diode so the system can achieve higher
    efficiency and superior heat dissipation performance.
    The SR MOSFET is turned on when VDS falls below turn-on
    threshold, and turned off when VDS exceeds turn-off
    threshold. The SR conduction voltage drop is continuously
    monitored to minimize the conduction loss. The extremely
    fast turn-off comparator and driving circuitry ensures the
    safety of the SR MOSFET, even in current continuous mode
    (CCM) condition.
    The IC can work well in wide output voltage range, even in
    short circuit conditions. The patented turn on detection
    circuity prevents SR turn on when Vds rings severely. The
    wide VDD range and gate driver technology make the
    controller ideal for wide output voltage range applications,
    such as adapters, chargers, USB Power Delivery (USB-PD),
    etc.
    This chip supports both high side rectification and low side
    rectification
    产品应用：应用AC-DC的移动设备/USB-PD和QC充电器/AC-DC 辅助电源/ 反激式可变电源输入电压

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商品描述

SC3503 is a smart secondary-side driver IC designed to
drive N-Channel power MOSFET used as synchronous
rectifiers in isolated flyback converters. The MOSFET can
replace Schottky diode so the system can achieve higher
efficiency and superior heat dissipation performance.
The SR MOSFET is turned on when VDS falls below turn-on
threshold, and turned off when VDS exceeds turn-off
threshold. The SR conduction voltage drop is continuously
monitored to minimize the conduction loss. The extremely
fast turn-off comparator and driving circuitry ensures the
safety of the SR MOSFET, even in current continuous mode
(CCM) condition.
The IC can work well in wide output voltage range, even in
short circuit conditions. The patented turn on detection
circuity prevents SR turn on when Vds rings severely. The
wide VDD range and gate driver technology make the
controller ideal for wide output voltage range applications,
such as adapters, chargers, USB Power Delivery (USB-PD),
etc.
This chip supports both high side rectification and low side
rectification
产品应用：应用AC-DC的移动设备/USB-PD和QC充电器/AC-DC 辅助电源/ 反激式可变电源输入电压

 

HV and VSEN Pin Rating120V
Maximum FrequencyUp to 1MHz
DRV Voltage8V/6V
DRV Sink Current4A
Quiescent Current105uA
Minimum Turn-on Time0.30~0.40~0.50(uS)
Turn-on Delay20nS
Turn-off Delay20nS
Turn-off Propagation10nS
Features高频 GaN
PackageSOT23-6
ModeCCM/QR/DCM

性能

• 较宽的输出电压范围，输出电压甚至可降至 0V

• 不需要辅助绕组额外供电

• 特殊的开启检测电路，确保 MOSFET 不会误开通，已申请专利保护

• 可兼容多种类型的 MOSFET

• 10nS 关断传输延时

• 开关频率可达 1MHz

• 极低的静态电流导致低待机功耗

• 支持 DCM、CCM 和 QR 模式的反激变换器

• 支持高端同步整流和低端同步整流