Project Hub /Basic Analog & Power Electronics/Power Supplies & Voltage Regulators/USB-C Power Delivery Sink - CYPD3177

Intermediate

ANALOG / DISCRETE

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

USB-C Power Delivery Sink - CYPD3177

A compact USB-C Power Delivery sink and decoy board capable of negotiating up to 20V and 5A from compatible USB-C power supplies.

Originally published on Hackaday.io

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

Cable for Arduino Nano (USB 2.0 A to USB 2.0 Mini B) 30cm Rs. 69.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Passive Components (generic)
Thyristor / SCR / Triac / Varistor / Fuse
Diodes (1N4007 / 1N4148 / Schottky / Zener)
Custom PCB / PCB Fab

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How It Works

The USB-C Power Delivery Sink project centers around the Cypress CYPD3177 controller, a dedicated integrated circuit designed to negotiate power profiles with a USB-C Power Delivery (PD) source. When connected to a compatible USB-C charger via the mid-mount USB-C plug, the CYPD3177 communicates over the Configuration Channel (CC) lines to request specific voltage and current levels, scaling up to 20V and 5A. User interaction and configuration are handled by the two Nidec Copal 5-position rotary switches, which allow manual selection of the desired voltage or power profile. To safely manage the high power path, dual Diodes Inc. P-channel MOSFETs act as load switches, opening or closing to control power flow to the output. Once the correct voltage is successfully negotiated by the controller and enabled through the power path, the regulated power is delivered to the connected load via a 2-pin METZ CONNECT screw terminal. The custom printed circuit board layout integrates these components alongside necessary passive elements to ensure stable operation, proper decoupling, and reliable thermal performance during high-current delivery.

Why Build This

Upgrade legacy laboratory equipment and development boards to run off modern, standardized USB-C power bricks instead of traditional multi-voltage wall adapters.

Gain hands-on engineering experience with modern USB Power Delivery protocol hardware negotiation and high-side power switching using P-channel MOSFETs.

Design a custom power distribution solution capable of delivering adjustable high-voltage and high-current rails for demanding undergraduate engineering prototypes.

Real-World Application

Replacing legacy wall adapters with a standardized USB-C power delivery solution for various electronics projects and single-board computers.

Skills You'll Learn

USB-C Power Delivery protocol negotiation

high-side power switching with P-channel MOSFETs

rotary switch configuration and interface design

custom PCB power routing for high currents

Safety Precautions

Connecting power to the wrong pins or configuring the board to a voltage higher than required by the connected device can cause permanent damage.

Technology Tags

USB-C

POWER DELIVERY

CYPD3177

HARDWARE DESIGN

PCB

SOLDERING

POWER MANAGEMENT

Frequently Asked Questions

What kind of USB-C charger do I need to use with this board?

You need a USB-C charger that supports USB Power Delivery (USB-PD) capable of outputting the specific voltage and current profiles you wish to negotiate.

Can I use software to program the CYPD3177 controller?

No software is listed for this build; the project relies on hardware configuration via the rotary switches to select power profiles.

How much current can this sink safely handle?

The hardware is capable of negotiating up to 5A, but your actual current delivery depends on the limits of your connected USB-C power source and the thermal performance of the P-FETs and PCB traces.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

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