Shenzhen CXW Technology., Co Ltd
15 years of experience
Overview
The CX75GD080BL is a high-frequency, high-performance quasi-resonant AC-DC power switch with an integrated high-voltage GaNFET power device. It is designed for isolated flyback switching power supplies targeting high performance, low standby power, low cost, and high efficiency within 27W.
The CX75GD080BL features an operating frequency of up to 200kHz and can operate in quasi-resonant mode across the entire range. Under light load conditions, it enters burst mode to enhance efficiency, minimizing audio noise components below 23kHz and eliminating audible noise during operation.
The CX75GD080BL integrates comprehensive protection features, including: Vcc Under-Voltage Lockout (UVLO), Vcc Over-Voltage Protection (Vcc_OVP), Input Under/Over-Voltage Protection, Output Over-Voltage Protection (VO_OVP), FB Open/Short Circuit Protection, Secondary-Side SR Short Circuit Protection, and CS Open/Short Circuit Protection.
The CX75GD080BL provides excellent electromagnetic interference (EMI) performance, offering an excellent design platform for cost-effective flyback switching power supply systems requiring ultra-low standby power consumption.
Features
● Integrated High-Voltage GaNFET Power Device
● Wide Vcc Operating Voltage: DC 9V - 40V
● Switching Frequency Up to 200kHz
● Proprietary Soft-Start Circuit Reduces Secondary Vds Stress
● Built-in Input Over/Under-Voltage Protection
● Built-in Output Over-Voltage Protection
● Built-in Vcc Over/Under-Voltage Protection
● Built-in OPP/SSCP Protection
● Built-in Pin Open/Short Circuit Protection
● Supports External OTP Setting Protection
● Supports PPS Wide-Range Output
● SOP-8L Package
Applications
● Switching AC-DC Power Supplies
● Smart Small Appliances
● PC Peripheral Power Equipment
● Laptop Auxiliary Power Supplies
CX7538BS is a high-performance secondary side synchronous rectification control circuit for switch-mode power <br/><br/>supplies. It easily meets the Level VI energy efficiency requirements in low-voltage, high-current switch-mode power <br/><br/>supply applications, making it an ideal solution for ultra-low forward voltage drop rectification devices. It also supports <br/><br/>various operating modes of switch-mode power supplies, such as CCM, QR , and DCM . Its extremely low forward <br/><br/>voltage drop results in much less conduction loss compared to Schottky diodes, greatly improving the system&#039;s <br/><br/>conversion efficiency and significantly reducing the temperature of the rectification device.<br/><br/><br/><br/>The CX7538BS chip features an NMOSFET synchronous rectification switch with a built-in voltage tolerance of 60V <br/><br/>and an extremely low internal resistance, with a typical RdsON as low as 12mΩ, providing the system with an output <br/><br/>capability up to 4A. The chip determines its switching state by detecting the source-drain voltage of the built-in <br/><br/>MOSFET, making it compatible with flyback converters in continuous mode, discontinuous mode, and quasi-resonant <br/><br/>operation modes.
Overview
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