Shenzhen CXW Technology., Co Ltd
15 years of experience
Model No. :
CX8838BWithstand voltage :
32VOutput voltage :
2-32VOutput current :
200WWorking mode :
Same rise and fallPackaging :
QFN4x4-32Summary:
CX8838B is a synchronous switch buck boost controller. The controller can adjust the output voltage above or below the input voltage.
CX8838B can operate within a wide input voltage range of 3.6 V to 32 V. A wide input voltage range of 32 V (up to 36 V) to support various applications.
CX8838B adopts constant conduction time control in both boost and buck operating modes to achieve excellent load and line regulation.
CX8838B switch frequency can be set to 150kHz, 300kHz, 600kHz, or 1200kHz. Based on the different resistance values between the FREQ pin and GND pin, the switch frequency can be set to 150kHz, 300kHz 600kHz, or 1200kHz.
CX8838B has programmable soft start function and provides various protection functions, including cycle by cycle current limit, input undervoltage lock limit, input undervoltage lock (UVLO), output overvoltage protection (OVP), input overvoltage protection, overvoltage protection (OVP), input overvoltage protection thermal shutdown and output short-circuit protection, thermal shutdown and output short-circuit protection.
CX8838 VADJ and IADJ pins are used for programming output VBUS voltage and output current limits, voltage and output current limits, providing voltage control loops, constant current loops, thermal regulation loops temperature sensing loops, and temperature sensing. This makes the CX8838B the best choice for USB powered applications.
Features:
Step-down Boost Controller for Step-up/Step-down
DC/DC conversion
Dynamic programming of output current and voltage using PWM signals or analog signals
Wide output range from 2V to 32V
Comprehensive protection features include
Output short circuit protection (OSP), cycle by cycle protection
Input and output peak current limitation, thermal regulation, thermal shutdown, input undervoltage locking, input and output peak current limitation thermal regulation, thermal shutdown, input UVLO, input OVP, output OVP, etc.
Switching frequency can be adjusted using resistors
Frequency jitter for good EMI performance
Integrated 2-A MOSFET gate driver
Input or output average current limit, with
Stable CC loop
5V/55mA low IQ LDO supplies power to the system MCU
Available in QFN4x4-32 packaging
Application:
Car start stop system
Industrial PC power supply
USB power supply delivery
car charger
HUB power supply
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