High-density evaluation board for 65W multi-port fast chargers

6th September 2023
Sheryl Miles

Silanna Semiconductor, the power density specialist, has unveiled an evaluation board that simplifies the design, testing, and prototyping of 65W multi-port USB-PD and QC fast charging applications.

Designed to deliver a real-life implementation when used with a front-end AC/DC converter, the SZPL3002AA-EVB03 integrates three Silanna SZPL3002A DC/DC converter ICs, which are the first integrated buck converters to offer intelligent power sharing capabilities. Two USB-C female connectors and one USB-A connector are provided, while screw terminals are located at the input for connection to a DC supply (typically 24V).

The board is preconfigured from the factory with contract configurations for two 65W Type-C PD ports and an 18W QC Type-A port. Total power delivered by the EVB is limited to 65W and is constantly monitored and re-allocated between ports by the firmware. The switching frequency is set to 667kHz with 8ms of soft-start time. An I2C bus interface allows for inter-IC communication among the SZPL3002A devices for advanced applications in shared power, multiple output charging ports. The bus also facilitates programming on-board OTP memories.

“This new evaluation board will dramatically simplify the evaluation of advanced multi-port USB-PD and QC designs featuring intelligent power sharing between ports,” says Hubie Noto, Silanna Semiconductor’s Director of Marketing. “As a result, OEMs can deliver ultra-high-density solutions that dynamically adapt to real-life device power needs to optimise charging across a variety of use cases.”

Incorporating a built-in USB PD/FC port controller and operating with efficiencies to 98%, the Silanna SZPL3002 DC/DC converter is supplied in a QFN 5mm x 5mm thermally enhanced package and significantly reduces the number of components needed to implement 65W fast charger and adapter applications. These include AC/DC chargers, multiple output USB-PD charging strips and USB-PD outputs in displays, televisions, docking stations, and laptops. The integrated port controller offers full support for USB PD V3.0 Type C interfaces and QC2.0/3.0/4.0/5.0 support for Type A/C connections. Facilitating power sharing and port power re-balancing functionality across two or three ports, the controller ensures that port power adapts to the needs of a particular device, irrespective of when connections are made.

SZPL3002AA-EVB03 features

  • Supports switching frequencies up to 2MHz
  • High efficiencies for 3.3 ~ 21.5V Vout, 3.25A
  • Selectable power contract configurations – reduces required programming
  • Full support for multi-port shared power across type C and type A ports
  • Temperature triggered power throttling
  • Wide input voltage range: 7V to 27V
  • Integrated USB-PD controller supporting USB-PD R3.1, PPS, BC1.2, QC 2.0/3.0/4.0/4.0+/5.0
  • Integrated 100mW VCONN power generation for eMarked cables
  • UVLO/OCP/OVP/UVP/OTP protections


  • AC/DC chargers with USB-PD support
  • Multiple output USB-PD charging strips
  • USB-PD outputs in displays and TVs
  • Docking stations and laptops

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