CX9428 is an efficient synchronous boost converter, with an input voltage reduced to 3V and an output voltage of up to 5V. It is equipped with dual N MOS and supports 24W power output.

It is commonly used for mobile lever speakers, multi port chargers with PD or QC fast charging, lithium battery boost, and automotive LED headlight boost devices!

CX9428 Specification Overview:

The CX9428 chip is a current mode boost (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. This boost BOOST switching power supply is specially designed with a voltage protection system to prevent load short circuits from causing system bus burnout or damage. The power chip has the characteristics of a current limiting switch transistor drive and a synchronous rectifier switch transistor drive, 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. The CX9428 chip also includes undervoltage latch, overcurrent protection, and over temperature protection to prevent damage in the event of output overload.

Features:

• 3.0V-30V wide input range

• Output voltage: 5V To 30V

• Fully compliant with Intel Thunderbolt Power Spec

• Input current limiting switch gate drive circuit

• SR gate drive circuit

• Enhanced PWM mode for fast transient response

• 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