Quick Charge 2.0 smartphone charger reference design

22nd October 2013

Nat Bowers

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Power Integrations has today revealed an industry first with its reference design for a Qualcomm Quick Charge 2.0-enabled charger power supply. Launched by Qualcomm earlier in 2013, the Quick Charge 2.0 protocol up to 75% faster charging of mobile devices than conventional USB charging technology.

Used with AC-DC switcher ICs from Power Integrations, the new ChiPhy AC-DC wall-charger interface ICs combine all elements required to add rapid charging functionality to AC-DC wall chargers. Detecting commands from a Quick Charge 2.0-enabled device, the CHY100 adjusts the output voltage of the AC-DC wall charger to deliver increased power to the device’s battery through a standard USB cable. Without Quick Charge 2.0 capability, the CHY100 IC automatically disables the higher-voltage capability. This ensures safe operation and backwards compatibility.

Utilizing TOPSwitch-JX switcher and CHY100 interface ICs, the new DER-381 evaluation platform describes a CV/CC charger power supply capable of up to 24 W. Faeturing a maximum constant current of 2 A, this universal input power supply offers selectable output voltages of 5 V, 9 V, and 12 V. The TOPSwitch-JX IC maintains virtually constant efficiency across a very wide range of output voltages and current load conditions.

Peter Vaughan, director of application engineering at Power Integrations, comments: “DER-381 shows, for the first time, how a Quick Charge 2.0 charger power supply can be successfully implemented using the latest generation of Power Integrations’ switcher and interface ICs and simple optocoupler feedback.”