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USB-C PD PMIC | Option 1 | Option 2 | Option 3 | Option 4 |
|---|---|---|---|---|
Name | STUSB4500 | TPS25730TPS25730x | CYPD3177 | FUSB302B + RP2040 |
Description | USB-C PD Sink IC | USB-C PD Sink IC | USB-C PD Sink IC | USB PD IC + MCU |
DigiKey $/ct | $5.22 CAD | $3.76 CAD | $3.51 CAD | $2.59 + $1.08 CAD |
Configuration | NVM config editing in EEPROM via I2C TPs | Strapping resistors on ADC pins | Strapping resistors on pins | Firmware control on RP2040 via I2C |
Misc. Pros | Popular and well documented USB-C sink device within hobbyist community | Newest controller, supports USB-C PD rev 3.1, simple to implement, extensive schem and layout guidelines, D-model has integrated FET gate | Cheapest option, simple implementation, some online examples | Most configurable option, no need for strapping resistor variants, completely firmware controlled via I2C |
Misc. Cons | Expensive | PD 3.1 is irrelevant for the purpose of this project, also doesn’t support 240W | Complicated implementation |
The TPS25730 TPS25730x was selected for its recent release, comprehensive datasheet, relatively low price, and simple implementation.
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A typical USB-C PD controller will require a gate to block the USB-C input voltage while arbitration occurs. Once it the negotiation is completedsuccessful, the controller sends voltage to the gate to enable the transport of power.
In the case that it fails, there is sometimes a fallback “safe power” rail. These might typically supply 5V @ 900mA.
The TPS25730S recommends the https://www.digikey.ca/en/products/detail/texas-instruments/CSD87501L/5126233, while the TPS25730D comes with an integrated gate in the package. Given the small price delta between the S and D models, the TPS25730D is a very practical choice, and very simply concludes our FET selection.