GENERAL DESCRIPTION

The OB2601x is a highly integrated secondary- side constant voltage and constant current (CV/CC) controller, supporting Qualcomm Quick Charge 2.0/3.0/3.5 protocols. 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.

The OB2601x automatically detects Qualcomm Quick Charge 2.0/3.0/3.5 protocols, and enables output voltage adjustment according to the request. It supports the output voltages from 3.6V to 12V in 200mV increments for QC3.0 protocol and 20mV increments for QC3.5 protocol. It also supports the multi-level output voltages of 5.15V/9V/12V for QC2.0 protocol. If quick charger protocol is not detected, the OB2601x disables the output voltage adjustment to ensure safe operation with default 5.15V output voltage.

FEATURES

Protocol support

USB BC 1.2

Qualcomm Quick Charge 2.0/3.0/3.5

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

Built-in cable drop compensation

Built-in opto-coupler driver

Low operating current

Wide operation voltage range from 3.6V to 12V

Comprehensive protection and detection

Output over voltage protection（OVP）

Output under voltage protection（UVP）

DP/DN PIN over voltage protection and low impedance protection

Output voltage detected for constant power realization

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