OB2609

General Description       

        The OB2609 is a highly integrated secondary-side constant voltage and constant current (CV/CC) controller supporting HUAWEI SCP protocol. It is designed for use in applications that require Constant Voltage (CV) and Constant Current (CC) regulation. Two operational amplifiers are built in for voltage loop and current loop regulation with programmable voltage references according to protocols. The high gain current sense amplifiers minimize the offset for decreasing power loss of sense resistor.‍

Features

● Protocol support

● USB BC 1.2 protocol

● HUAWEI SCP A/B protocol

● Qualcomm Quick Charge 2.0

● HUAWEI Automatic identification of protocols

● Highly integration

● Secondary-Side Constant Voltage （CV）and Constant Current（CC）regualtion

● Built-in two operational amplifiers for dual CV/CC control

● Built-in unplug fast discharging control

● Programmable cable drop compensation

● Built-in blocking N-MOSFET Gate Driver

● Built-in opto-coupler driver

● Low operating current

● Wide operation voltage range from 3.4V to 12V

● Comprehensive protection and monitor

● Output over voltage protection（OVP）

● Output under voltage protection（UVP）

● D+/D- over voltage and abnormal protection

● External over temperature protection（OTP）

● Internal temperature and V/I monitor and report

● Vbulk high and AC on/off detection

● Package: DFN12

 

Applications

● Quick-charging AC/DC charges for cell phones, tablets and other portable devices

● AC/DC Adapters for Portable Devices that Requires CV/CC control

Typical Application Schematic