Silanna Semiconductor, a Power Density Leader, has unveiled an evaluation board that simplifies the design, testing, and prototyping of 65 W 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 world’s 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 24 V).
The board is preconfigured from the factory with contract configurations for two 65 W Type-C PD ports and an 18 W QC Type-A port. Total power delivered by the EVB is limited to 65 W and is constantly monitored and reallocated between ports by the firmware. The switching frequency is set to 667 kHz with 8 ms of soft-start time. An I2C bus interface allows for inter-IC communication among the SZPL3002A devices for advanced applications in shared power, and multiple output charging ports. The bus also facilitates programming onboard 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 optimize 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 5 mm x 5 mm thermally enhanced package and significantly reduces the number of components needed to implement 65 W 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.
Key features
- Supports switching frequencies up to 2 MHz
- High efficiencies for 3.3 ~ 21.5 V Vout, 3.25 A
- 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: 7 V to 27 V
- Integrated USB-PD controller supporting USB-PD R3.1, PPS, BC1.2, QC 2.0/3.0/4.0/4.0+/5.0
- Integrated 100 mW VCONN power generation for eMarked cables
- UVLO/OCP/OVP/UVP/OTP protections
Key applications
- AC/DC Chargers with USB-PD Support
- Multiple Output USB-PD Charging Strips
- USB-PD Outputs in Displays and TVs
- Docking Stations and Laptops
