Reference design; 27W charger circuit meets Qualcomm Quick Charge 4 spec
Quick Charge 4 is the latest fast-charging specification from Qualcomm Technologies, Inc., a subsidiary of Qualcomm Incorporated, 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 standardize the capabilities of adaptors using these technologies, while being designed to deliver metrics such as, “five hours of talk time from just five minutes of charging,” along with safety features.
Diodes contributes integrated device manufacturing, and expertise in primary- and secondary-side power regulation products for chargers and power adapter applications: Weltrend’s core competency adds MCU-based power management applications and protocol decoding products for quick charging. This, say the two companies, made for a logical partnership for developing a reference design to meet the demanding requirements of the Qualcomm Quick Charge 4 specification.
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 20 mV steps, and current from 0A to 3A in 50 mA steps. Its 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.
Diodes; www.diodes.com
Weltrend Semiconductor; www.weltrend.com
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
