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Synchronous rectification
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  • 型 号 :

    CX7539F

  • 待机功耗 :

    ＜150KHz

  • 工作模式 :

    CCM/QR/DCM

  • 控制方式 :

    100V/10mΩ

  • 应 用 :

    Charger, Adapter, Flyback Converter

  • 封 装 :

    ASOP-6
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Overview:

CX7539F is a high-performance synchronous rectification control circuit for the secondary side of switching power supply. In the application of low-voltage and high-current switching power supply, it can easily meet the energy efficiency of class 6, and is an ideal solution for ultra-low conduction voltage drop rectifier devices. The chip can support switching frequency applications as high as 150kHz, as well as switching power mode applications such as CCM/QR/DCM. The loss caused by its extremely low turn-on voltage drop is far less than the turn-on loss of Schottky diode, which greatly improves the conversion efficiency of the system and greatly reduces the temperature of the rectifier device.

CX7539F is a synchronous rectifier switch with built-in high voltage NMOSFET, and it has extremely low internal resistance, which can provide the application output of the system up to 5 years. IC determines the switching state of integrated MOSFET by detecting its source-drain voltage, which is compatible with flyback converters in continuous mode, discontinuous mode and quasi-resonant mode.

CX7539F adopts special self-power supply technology, which can ensure that the chip will not work under voltage in both constant current and constant voltage working states of the primary control system.


Features:

  • Compatible with CCM/QR/DCM modes

  • Unique VDD power supply technology

  • 4.5A driving current ensures fast MOSFET shutdown

  • 600uA low quiescent current

  • Supports switching power supply frequencies up to 150kHz

  • Support USB-PD+PPS system (3.3V- 20V)

  • Packaging: ASOP-6


Application:

  • PD, QC fast charging power supply

  • Multi port USB charger

  • Low voltage high current switching power supply


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