USB Power Delivery (PD) Connectors & Sourcing from China
1 resources tagged with "Power Delivery"
USB Power Delivery covers the negotiation protocol that lets USB-C carry up to 240W under the PD 3.1 EPR spec, and sourcing it from China means verifying claims that often don't survive a bench test. A factory may advertise PD 3.1 240W while shipping connectors with thin gold plating that pits under load, or cables that lack the e-marker chip required above 60W. Pages here cover how to verify PD ratings, gold plating thickness, and PCB retention rather than trusting the spec sheet.
Power Delivery is the handshake between source and sink that sets voltage and current; the physical connector and cable must support the negotiated power or they overheat. The classic failure is a connector rated for 240W on paper but with plating and contact geometry that degrade well below that — test under sustained load, not just continuity.
Wiki (1)
FAQ
How do I verify a USB-C connector really supports PD 3.1 240W?
Run a sustained-load test at the rated power and measure contact temperature rise; check gold plating thickness (15µin or more on contacts) and confirm the cable carries an e-marker chip. Anything above 60W/100W legally needs that e-marker, and many cheap cables omit it.
What goes wrong with cheap PD connectors from China?
The most common defects are under-spec gold plating that wears through after repeated mating, weak PCB retention tabs that crack the solder joint, and missing e-marker chips that cap real-world power. These pass a quick continuity check but fail in the field.
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