Reference design supports Qualcomm Quick Charge 3.0

ON Semiconductor has rolled out a reference design implementing the Qualcomm Quick Charge 3.0 protocol that claims to offer significant efficiency improvements over the existing Quick Charge 2.0 solution. The high efficiency, small form factor reference design supports the Quick Charge 3.0 High Voltage Dedicated Charging Port (HVDCP) Class A and Class B specifications, Qualcomm's next generation of fast charging technology for smartphones and tablets, as well as offering backward compatibility to the older Quick Charge 2.0 protocol, detailed the company.

Qualcomm Quick Charge 3.0 technology is a product of Qualcomm Technologies Inc., a subsidiary of Qualcomm Inc. The availability of a complete reference design from ON Semiconductor as well as certified conformance from UL aids the rapid development of small form factor chargers for portable applications with industry leading efficiency.

The reference design highlights the NCP4371 secondary side charge controller, which allows the charger USB-bus voltage to be changed based on requests from the phone or portable device. To optimise the battery charging time, the USB-bus voltage can be controlled in discrete steps from 3.6V up to 20V. The charge controller is also suited for use in A4WP wireless charging applications where the voltage can be optimised based on the transmit (TX) portion of the reference design.

The NCP4371 also removes the need for a secondary shunt regulator, saving cost and the space required to implement a charger design. The primary side controller is the NCP1361 PSR quasi-resonant PWM controller and the synchronous rectification controller is the NCP4305. The combination of these two controllers enables a high efficiency design meeting CoC Tier-2 requirements for chargers, added On Semi.

The NCP4371 is offered in a SOIC-8 package and priced at $0.18 per unit in 10,000 unit quantities.