USB-IF certification for 140W USB PD EPR adapter design
STMicroelectronics has received certification for two chips for adapter (source) and device (sink) designs of a USB Power Delivery (USB PD) EPR power supply or charger.
The chips for the Extended Power Range (EPR) design extend the range of a universal charger to 140W so that a single USB-C AC to DC adapter can charge equipment such as computers, smart-home actuators, power tools, and e-bikes, as well as traditional applications including smartphones, tablets, and smartwatches.
The certification from the USB-IF (USB Implementers Forum) is key at this higher power rating of 28V and 5A to ensure that designs operate safely.
ST is an active contributor to the USB PD 3.1 specification which includes the EPR definition and this is among the first designs to be certified.
The REF_STUSB140W sink design and the ST-ONEHP source design represent two halves of the complete USB PD reference design. The sink reference design is based on an STM32, an STUSB1602 analog front-end IC, high-voltage protection devices, and a dedicated software stack. The design supports protocol fine tuning and addresses a large range of applications.
The ST-ONEHP controller in the source design integrates an ARM Cortex M0+ core pre-loaded with certified USB PD 3.1 EPR firmware, an offline programmable controller with synchronous rectification, and a USB PD PHY in a single package. It pairs with ST’s MasterGaN1 power stage to create the world’s highest power density chargers for any battery powered device, appliance or smart mobility application, exceeding 25W/in.3 with 140W output power and 94% peak efficiency.
“The USB PD 3.1 specification represents a significant breakthrough to satisfy the charging demands of a wider range of applications beyond 100W,” said Jeff Ravencraft, USB-IF President and COO. “As one of the first USB PD EPR reference designs to achieve USB-IF Certification, ST’s latest ICs will accelerate the industry’s transition from proprietary power connectors to USB Type-C.”
“Leading the way among semiconductor manufacturers, ST is now able to deliver USB-IF-certified reference designs and chips to meet customers’ demands for a high-power, industry-standard universal charger/adapter,” said Matteo Lo Presti, Executive Vice President Analog Sub-Group, Analog, MEMS and Sensors Group, STMicroelectronics.
“By moving quickly to support USB PD EPR and achieve certification, we are accelerating the replacement of custom power plugs and DC barrels in numerous applications with a USB-C connector. This allows charging with a universal AC or DC adapter, reducing cost and environmental impact.”
Samples of the ST-ONEHP are already available in a SSOP36 leaded package, priced from $3.90 for orders of 1000 pieces. Evaluation boards of the SINK and SOURCE solutions will be available on request in Q2’2023.
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