To develop mobile device chargers supporting Qualcomm Quick Charge 4 specification for the fast charging of mobile devices, Diodes and Weltrend have launched a 27W, Class A charger reference design.
Quick Charge 4 is the latest fast-charging specification from Qualcomm Technologies, offering up to 20% faster charging, up to 30% greater efficiency, and running 5% cooler when compared to Quick Charge 3.0. Quick Charge 4 also supports USB PD and PPS (programmable power supply), helping to , helping to provide five hours of talk time from just five minutes of charging.
“Diodes recognized Weltrend’s core competency in MCU-based power management applications and its established market position in protocol decoding products for quick charging, which made for a logical partnership for developing a reference design to meet the demanding requirements of the Qualcomm Quick Charge 4 specification”, commented Ernest Lin, Division Manager, AC-DC Power and Lighting Division.
The reference design uses Diodes’ AP3302 peak-current control, quasi-resonant (QR) PWM controller, which is optimized for high performance, low standby power and cost-effective offline flyback conversion, and its APR345 secondary-side MOSFET synchronous rectification driver that directly supports CCM, DCM and QR flyback topologies.
Weltrend provides the highly integrated WT6615F programmable protocol decoder that supports the latest programmable power supply specification for Quick Charge protocols and USB PD, and consequently fully implements all the requirements of the Quick Charge 4 specification.
Weltrend’s WT6615F Qualcomm Quick Charge 4 Controller is certified by GRL. The reference design supports Quick Charge 4 Class A (18-27W) and also provides optional Quick Charge 2.0 and Quick Charge 3.0 compliance to support the Quick Charge 4+ program. It provides support for USB PD 3.0 and PPS, including PDO at 5V and 9V, ADPO from 3V to 11V in 20mV steps, and current from 0A to 3A in 50mA steps.
Furthermore, the WT6615F’s safety management capability provides monitoring of voltage, current, and temperature, with reporting and protection features. The charger design supports low standby current consumption and meets Energy Star DOE VI and CoC Tier II efficiency requirements.
For further information, click here.