Summary:

CX9428 chip is a current mode boost chip with a fixed frequency of 600KHz, high efficiency, and wide input range, and has high efficiency synchronous boost function and adjustable current limiting function.

CX9428 chip is specially designed with a voltage protection system to prevent load short circuits from causing system bus burnout or damage. The power supply chip has the characteristics of a current limiting switch transistor drive and a synchronous rectifier switch transistor drive internally to achieve low power consumption and high efficiency power switching. Users can flexibly establish dynamic loops through external compensation to achieve optimal transient performance under all conditions.

CX9428 chip also includes undervoltage latch, overcurrent protection, and over temperature protection to prevent damage in the event of output overload.

Characteristic:

• Fully compliant with Intel Thunderbolt Power Spec

• Input current limiting switch gate drive circuit

• SR gate drive circuit

• Enhanced fast transient response in PWM mode

• 3.0V-30V wide input range

• Output voltage: 5V To 30V

• When the chip stops working, the current is<1 µ A

• The chip stops working at a temperature of 160 ° C

• SOP-14L packaging form

Application:

• Thunderbolt interface

• Laptops and tablets

• Hot swappable power management

• Communication power supply