Shenzhen CXW Technology., Co Ltd
15 years of experience
Summary:
CX7538BS is a high-performance secondary side synchronous rectification control circuit for switch-mode power
supplies. It easily meets the Level VI energy efficiency requirements in low-voltage, high-current switch-mode power
supply applications, making it an ideal solution for ultra-low forward voltage drop rectification devices. It also supports
various operating modes of switch-mode power supplies, such as CCM, QR , and DCM . Its extremely low forward
voltage drop results in much less conduction loss compared to Schottky diodes, greatly improving the system's
conversion efficiency and significantly reducing the temperature of the rectification device.
The CX7538BS chip features an NMOSFET synchronous rectification switch with a built-in voltage tolerance of 60V
and an extremely low internal resistance, with a typical RdsON as low as 12mΩ, providing the system with an output
capability up to 4A. The chip determines its switching state by detecting the source-drain voltage of the built-in
MOSFET, making it compatible with flyback converters in continuous mode, discontinuous mode, and quasi-resonant
operation modes.
Characteristic:
Compatible with DCM, CCM, and QR flyback converters
Output voltage directly supplied to VCC
150uA low static current
4.5A driving current ensures fast MOSFET shutdown
Maximum switching frequency of 200kHz
Low output voltage operation
Adopting SOP-8L packaging form
Application:
Mobile device charger
Adapters
Flyback converter
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