OB2151 is a wide input voltage, high-efficiency, high performance synchronous-rectified buck converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) Mode. With integrated low Rdson switches, the high-efficiency buck converter is capable of delivering up to 3.4A output current for charger interface and a wide input voltage range from 8V to 32V. OB2151 supports Qualcomm Quick ChargeTM 2.0/3.0 (QC2.0/QC3.0), MTK PE2.0, FCP1.0, AFC, PD(3.0) fast charge protocols, Apple PD 20W protocols.. It also supports Apple, BC1.2 protocols.


OB2151 utilizes soft driving technology to achieve good EMI performance.


OB2151 also provide soft-start, flexible built-in cable compensation (see cable compensation section), VIN/VOUT over voltage protection, over temperature protection, and output short circuit protection with hiccup mode. The built-in multi-stage detection scheme effectively protects the device and system when the output hard short to ground.


OB2151 is available in ETSSOP16 package and required very few external components for operation.



n  Synchronous-rectified Buck Converter

²  Integrated Low Rdson Switches.

²  Wide Input Voltage Range: 8V to 32V.

²  Support 5.2V/3.4A, 9V/2.22A, 12V/2A.

²  PD broadcast 5V/2.4A,9V/2.22A,12V/1.5A

²  Up to 98% efficiency and 92% efficiency at VCSN 5.2V 3.4A, VIN 12V.

²  Built-in Cable Compensation.

²  Multi-Stage Short Circuit Protection and Hiccup Mode.

²  VIN/VCSN Over Voltage Protection and Over Temperature Protection.

²  Good EMI Performance.

n  Support Type-C Interface and PD Protocols

²  Support 5V, 9V, 12V PD protocols.

²  Support Apple PD 20W protocols (9V2.22A)

n  Quick Charge Protocols

²  Support Apple, and BC1.2 protocols.

²  Support QC2.0/QC3.0, PE2.0, FCP1.0, AFC Fast Charge protocols.



n  Car Charger

n  Cigarette Lighter Adaptor

n  Portable Charging Devices

n  USB hub