Questions tagged [power-delivery]
The power-delivery tag has no usage guidance.
50
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Implementing USB-C PD PHY directly into micro-controller
I want to explore more USB-C PD, in particular Programmable Power Supply (PPS), to supply my projects with power. There are some good projects1 using some standard communication (e.g. SPI or I2C) to ...
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1
answer
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USB C PD fast power role swap
I'm currently designing a device, which consists of a STM32 microcontroller with USB 2.0 support, USB 2.0 hub and few dimmable leds.
STM is connected to the hub, along with few other devices. Hub is ...
4
votes
2
answers
148
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Safety of dual male / single female Y cords
On Amazon there are Y cords with two male plugs and a single, higher current female socket. These are advertised as providing a way to power equipment with higher current demands than a single outlet ...
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4
answers
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Always-on socket in-between a 2-way switch?
I have access to a power cable that powers devices through a 2-way switch, basically:
Is it possible to add an always-on socket in between using L1, ...
- 132
3
votes
2
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533
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Crossing USB Type-C wires on debug probe
I plan to make debug probe that allows me analyze traffic on USB Type-C cable. I want to make blue middle board from the following schametic:
From my point of view right port of the my board is ...
- 385
2
votes
3
answers
345
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How do bypass capacitors recharge in high-frequency if the PCB can't deliver high-frequency currents?
I understand the whole theory behind bypass capacitors, how they are necessary to deliver high-frequency currents to the IC, as the PCB in general has high-inductance, thus high-impedance in high-...
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2
votes
2
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PDN with ferrite bead
One objective in PCB design is to keep PDN impedance lower than a certain value upto a frequency range, to ensure power integrity. I believe that maintaining power integrity means that PDN is able to ...
- 2,103
2
votes
1
answer
75
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Can USB-C PowerDelivery be restricted to manufacturers devices? [closed]
I have recently searched for a new monitor. I'd like to have a single-cable setup via USB-C, so I need a monitor that supports PowerDelivery. I found a good match (from HP) but looking into reviews on ...
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2
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0
answers
212
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USB Type-C DRP Integrated Switch/Interface Chip
I would like to experiment with a power bank design with a single usb type-c port. The port should have dual role, source current for charging other devices as well as sink current for charging itself....
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1
vote
2
answers
915
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Creating a USB charger from 2-wire DC [closed]
I'm trying to tackle a problem where I want to wall-mount a USB device on a brick wall that only has a single 2-wire (14AWG) cable available, and no room / capability to run a new cable or remove the ...
- 119
1
vote
1
answer
485
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Do devices not tolerating swapping live and neutral exist?
Multiple types of domestic power sockets around the world (including the ones in my country) do not distinguish between live and neutral even when ground is present.
I am shopping for an AC-DC PSU ...
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1
vote
1
answer
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FTDI Debugger Load Switching
I’m developing a new version of a custom debugger board for my project. The debug target is a solar powered device, which means sometimes I want to power it from the host (debugger) and sometimes I ...
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1
vote
1
answer
2k
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USB-C and >5V Power Supply
I have a question about power supplies and Power Delivery on USB-C. I'm trying to understand the USB-C specification, Power Delivery, UFP and DFP, DRP... but this is a nightmare. There are not ...
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1
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1
answer
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I'm having issues with multiple regulator power delivery design
The device I'm designing consists of an STM32F405, a few 3V peripherals, and a few 5V peripherals. The device is is powered off of a 12700 Li-ion battery. The first regulator is a buck/boost that is ...
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1
vote
1
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Help identifying chip in Huawei motherboard
Can you help me identify this chip? It looks like a SOT23-5 chip, it seems to be part of the USB-C Power Delivery. The laptop doesn’t power up because this chip seems to be part of the negotiation ...
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