Summary:
CX7430 is a high-performance switch power supply secondary side synchronous rectification control circuit. In low voltage and high current switching power supply applications, it easily meets the 6-level energy efficiency and is an ideal solution for ultra-low conduction voltage drop rectifier devices.
CX7430 supports switching frequency applications up to 150kHz, as well as switching power supply operating modes such as CCM/QR/DCM. Its extremely low conduction voltage drop results in much lower losses than the conduction losses of Schottky diodes, greatly improving the conversion efficiency of the system and significantly reducing the temperature of rectifier components.
CX7430 high current totem pole drive output with voltage clamping can be directly used to drive external MOSFET devices. The peak current drive capability of up to 1A can ensure that external high current MOSFET devices can be quickly turned on and off, obtaining excellent conversion efficiency; The output voltage clamping function ensures that the gate is still safe and reliable under high supply voltage.
The highly integrated circuit design of CX7430 makes the peripheral circuit of the chip extremely simple. In applications where 5V output is directly powered, a complete switching power supply output synchronous rectification application can be constructed with only one MOSFET.
Characteristic:
Supporting switch mode power supply CCM/QR/DCM mode
High current ultra fast totem pole output drive circuit
Output peak driving current capacity up to 1A
Extremely wide working voltage range from 4.5V to 30V
It can be directly powered by 5V or powered by auxiliary winding
Built-in high-voltage isolation switch with a withstand voltage of up to 180V
When there is no switch, the static working current can be as low as 600uA
Support switching power supply frequency up to 150kHz
At the minimum, there is only one MOS switch on the periphery
SOT23-5 lead-free packaging