Questions tagged [usb-pd]

USB-PD tag relates to the Power Delivery extension of the USB spec. USB-PD is capable of support up to 100W of power through negotiation between spec-compliant USB phys.

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USB receptables for power delivery? [closed]

I'm not totally sure this is the right place to ask, but does anyone know of any USB C receptacles for low voltage and current power delivery? I can't find a good option with a good schematic.
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Needed switch bandwidth for USB Type C D+/D- over-voltage protection

I am currently trying to add over-voltage protection to a USB C PD receptacle (with BC1.2 support.) As the SBU pins aren't used, I'd like to protect the D+/D- pins from short to VBUS. The TI reference ...
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76 views

Do all USB-C to USB-C cables support QC 3.0? What about PD 3.0?

Given a USB cable which supports power delivery, does it necessarily support PD 3.0 and QC 3.0? (And only need to power source and device to support these protocols?) Do I need to check anything other ...
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USB DRP Reference Design (Dynamic USB-C sink/source + USB 2.0 data)

I am designing a device in which will have a phone with a USB-C port (host) connected to a USB 2.0 device (OTG mode). When the phone is connected to the device, it provides power to the device. I ...
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Charging at over 5W through a USB-A-to-USB-C cable

I'm trying to use this charger to charge a USB-C device (a MacBook). The charger is specified for 12W (5V, 2.4A), and has Type-A, non-superspeed connectors. The MacBook states up to 20V, 1.5A or up to ...
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Secondary MOSFET in STUSB4500

Could someone explain to me how reverse current protection in the STUSB4500 reference design should work? The purpose of the secondary MOSFET was already answered in this question, but I took a look ...
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USB3.0 PD port ORing

I was designing a product in which two USB Power Delivery ports are populated in the design so as to: Provide power from wall charger supporting PD Provide high speed communication with laptop Now ...
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72 views

Is a USB charging A-to-C Y-cable a really bad idea?

I know it's non-standard, just trying to figure out if it could work safely. On one end is a standard USB-A plug that can be plugged into chargers or computers. On the other end are two USB-C plugs ...
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133 views

USB Power Delivery over Type-A connector

I have a Xiaomi phone that came with a 33W charger. It says it does 5, 9, 11, 12 and 20 volt, so looks like a fairly normal USB-PD charger. Except, it has a type-A socket and came with an A-to-C cable!...
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33 views

Can USB PD pass-through charging deliver different voltage settings than it consumes?

I'm trying to understand USB PD pass-through charging and what charger/dock/host combinations would be compatible or how much power would actually be passed through. I have a MacBook Pro 2017 which ...
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30 views

Cheap USB-PD brick/dongle/dev kit with programmable current capability

Wikipedia claims that in USB-PD v2.0 or v3.0, a source can advertise that it is capable of outputting 5 V at any current from 0.1 to 3.0 A. I suspect I could use this capability to limit the charging ...
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Send data using USB-PD on android phones [ROOT]

USB-PD can transfer data at low speeds between devices and is quite a bit simpler than normal USB communication. Is it possible for an android app to send arbitrary USB-PD data? The phone has root ...
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charging speed from USB QC3.0 to USB-C PD

I am trying to find this information online for a while but I cannot find any precise info, thus Q on this community seems appropriate. I would like to know if a device having USB PD charging port (...
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40 views

Low power USB C power supply

I am searching for a tiny board to that accepts an usb-c cable and outputs 5v. To my understanding, for the few hundred milliamps two 5k1 resistors on the board would suffice. PD is not needed. I ...
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133 views

Draw 20V 3A out of USB-C PD

I'm a newbie trying to figure out how to power a DIY project using USB-C PD. I'm building a project using about 120 RGB LEDS (consuming 60mA at 5V) and a Raspberry Pi 4 (max 3A at 5V). So I would ...
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242 views

STUSB4500: Unable to negotiate USB-C PD voltage higher than 5V

for my project, I have decided to use STUSB4500 for negotiating 20V for powering external remotely controlled LED lighting. My circuit design comes from the minimum implementation in the datasheet, ...
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Parallel Usage of Buck Converters | LM2596 Module

For my application, I need three voltages +5V, +15V, -15V Initially, I was using wall socket plugs to connect two 15 volt adaptors, in which I connected the + and - together and considered it as ...
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170 views

Can I use more than 5V/1A without USB PD negotiation?

After connecting a PD charger, I see 15V on the power lines. That means, the device asked for 15V and the charger switched from 5V to 15V. Can I just put two wires into the USB-C port on the device, ...
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59 views

Will USB-PD work with and extension cable in the circuit?

I want to replace the USB type A port on my trucks dash with a USB-C panel mount and give it the ability to "fast charge" my phone. Unless there is a product that I am overlooking it seems I ...
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2answers
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Adding USB PD to my laptop

I would like to be able to charge my laptop via a USB-PD power source as seen in this article. I need to find out if my laptop input, which is rated at 19V 3.42A can handle the 20V provided by the usb ...
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118 views

Is charger with USB C connector and 13V output in line with standards?

I have bought cordless rotary tool. The charger which is included in the package is equipped with USB-C connetor, and the charger has rated output at 13V @ 1.5A. Is this "legal" according to ...
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USB C - max current without negotiating PD

I have a device that requires 5W @ 5VDC and want to convert it to USB C power. I am torn between a design that just has two 5.1 kΩ Pd resistors on the CCx lines or one that includes a PD negotiator (...
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Eliminating millivolt-level reverse current flow with diode or other

simulate this circuit – Schematic created using CircuitLab I am working with PD Buddy Sink, a small USB-C PD negotiation and power breakout board. It takes USB-C PD input, performs the PD ...
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145 views

What this mosfet really needed on the STUSB4500?

I want to use STUSB4500 in a project, to have USB C PD. A MCU will also be on the same PCB and it will control the STUSB4500 via I2C. There are two schematics in the datasheet (https://www.st.com/...
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Routing power and HDMI signal into usb type-c for DIY computer monitor

I am starting a project to build a DIY monitor. I have a spare lcd panel (model # LP156WF6) taken out of a laptop. I plan on buying a controller board for it and building it into a homemade enclosure. ...
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USB-C Powering Electronics and its Circuitry

I recently designed a PCB that'll power and control a NEMA 17 stepper motors. I decided it will be powered by a 15W (5V3A) USB-C cable and wall adapter. According to my research, the 15W power is the ...
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Charge a laptop without explicit USB PD capability using USB PD

I bought a new laptop, the Xidu Tour Pro. It came with a quite bulky 19V 2.1A power supply that I'd like to replace. One review at a respectable site claims that the computer charges just fine through ...
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Requesting the maximum available power from source

I’m trying to design my own battery pack. I want to use usb-c as one of the inputs. The goal is to draw as much power from the usb-c port as the source supports and to feed that into a boost converter ...
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Why does this USB device draw different currents from different sources?

What would cause a USB device to draw drastically different amounts of current, but still function properly? Background & Research: I purchased a Playstation 2 Graphics port->HDMI converter (...
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190 views

Powering 12V device from USB-PD port not supporting 12V

I would like to power a 12V 2.5A device using barrel connector from a 60W USB-PD capable thunderbolt 3 port. I have a few of those pd trigger cables (https://www.aliexpress.com/item/4000025832414.html)...
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Can a normal USB C panel mount socket be used to receive USB PD?

I'm building a lamp that has (up to) three wall-mounted units connected to a central control box. Each one gets three low-voltage control signal wires and 12V 3A DC power. I'm figuring that a USB PD ...
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Solar power to USB C PD

I want to convert direct sunlight energy into usb c pd. USB C Pd then will be used to charge a powerbank. The bank can be charged via USB C. The actual solar panel is this: https://www.amazon.de/...
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Battery charging over USB-C (using USB-PD?)

I'm designing my first PCB, a wireless Keypad/Macropad with a battery. I'm probably going to be using a 2Ah Li-Ion battery because there will be a lot of LEDs on it and I just want it to last longer ...
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What would happen if a charger tried to pull more current than a QC 3.0 source can output?

I've got this charger: https://store.dji.com/product/mavic-car-charger It takes 12.7 - 16V input from a car and outputs 13.05V at 6.1A (~80W) I want to utilize a USB-PD and / or USB-C QC 3.0 ...
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506 views

USB C Spec Compliant way of splitting power

I'm trying to get a Y Splitter going on, where one of the sides is passthrough on the CC pins and the other side has a step down/buck converter that can take 5-20v input and always do 5v output. I ...
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Can I charge my AC rechargeable hearing aid batteries via USB PD with converter?

I hope you'll be able to help. First of all this is a bit of a complex one that I'm struggling with. I wear hearing aids, both of which use removable, rechargeable batteries, charged only by a charger ...
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How to get 20 V from a USB-C charger?

I want to power my DIY stuff with a MacBook Pro USB C charger. The label on a charger says that it can provide three different power profiles: 20.2V - 4.3A 9V - 3A 5.2V - 2.4A There is a ton of ...
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649 views

Purpose of ICs in EMCA - Type-C

I can't find the purpose of IC ( which is power sourced by VConn) inside the EMCA. Source/Sink can communicate with EMCA via this IC. But what is exactly function of this IC in Power Delivery ? P/S: ...
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Do all USB Type C cables support full power delivery

USB Power Delivery is able to work over USB Type A/B cables which are specifically designed to support it. Since the USB Type C was designed much later, I am curious. Do all USB Type C cables support ...