DC-DC buck power supply chip, high current DC-DC buck chip recommended CX8871, with external dual N MOS. Compared to CX8571, this chip can save one capacitor, has adjustable frequency mode, and has more cost-effective advantages. We provide CX8871 solution development materials, CX8871 specifications, CX8871 sample application and technical support!

CX8871 Overview:

CX8871 is a step-down PWM controller that can drive a constant voltage accuracy of ± 2% (VFB=1.0V) dual output of 8A (4A+4A) load current.

The design allows the CX8871 to operate within a wide input voltage range of 4.75V-40V. The external shutdown function is achieved by lowering the RT/EN pin logic level and entering standby mode. External compensation enables the feedback control loop to have good line voltage adjustment and load adjustment rates, and the peripheral design is flexible.

CX8871 can operate in CC (constant current output) or CV (constant voltage output) modes, and the overcurrent protection (OCP) current value can be set through external current detection resistance.

CX8871 is a stable and reliable constant voltage and constant current buck DC-DC converter with minimal application, excellent performance, and MSOP10 packaging.

Features:

• Input voltage can reach 4.75V-40V

• Constant voltage accuracy ± 2% (VFB=1.0V)

• Dual channel CC/CV mode

• Dual channel external current limiting

• Constant current accuracy ± 6%

• Duty cycle range 0-95%

• Built-in adjustable line voltage compensation

• Built-in soft start time 3ms

• Adjustable switching frequency (110KHz-220KHz)

• One pin for external frequency regulation and shutdown control

• Short circuit protection (SCP), overheat protection (OTP), overvoltage protection (OVP)

• Built in SW cycle by cycle detection mode to avoid short circuit damage of R SENT current limiting resistor to the product

• MSOP10 Packaging Form

Applied to:

• car charger 

• Illuminating lamp

• Portable device power supply