Diodes' combination of the AP3302, AP43331N, and APR34509 provides a highly integrated efficient solution to Quick Charge 3.0 chargers. The AP43331N(SO-8) is a secondary side Qualcomm Quick Charge 3.0 (QC 3.0) charging port (HVDCP) Class A controller. Using the USB data pins, it determines the output voltage of the AC-DC USB charger. The USB-bus voltage is adjusted in discrete steps (QC 3.0's step is 0.2 V). The output current is limited not to exceed maximum allowable power level.

The AP3302 is a quasi-resonant controller optimized for high performance and cost effective Quick Charge applications. It operates in valley lock QR mode to improve system efficiency and EMI performance, and will enter the burst mode at no load or light load to minimize standby power.

The APR34509 is a secondary side synchronous rectifier (SR), supporting CCM, DCM, and quasi-resonant modes. It is suitable for 5 V to 12 V output voltages for 15 W to 24 W applications. By sensing the MOSFET’s drain-to-source voltage, the APR34509 enhances the MOSFET to minimize conduction losses when compared to Schottky/SBR rectifiers.

The Diodes' Advantage
AP43331N+AP3302+APR34509 delivers high performance, cost effective Quick Charge 3.0 solutions for portable and consumer applications.

• AP3302 provides QR mode and output under-voltage protection (SUVP)
  • QR improves efficiency across all load levels
  • SUVP provides protection when charger’s output cable is shorted
• AP43331N provides CC/CV and auto-discharge function
  • Controls max output power to 18 W from 9 V to 12 V
  • Safe-discharge to quickly and reliably discharge output capacitors when the output voltage is switched down.
• APR34509 provides synchronous rectification in SO-8EP
  • Improves efficiency with minimum BOM cost and solution size

Applications

• Quick Charge 3.0 for intelligent smartphones