![]() ![]() ![]() Bought a cable that goes from USB C to USB A and another cable that goes from USB A to DC 5.5mm that goes straight to the light. The Power bank is Anker 10k with USB C PD. I tried so many different approaches and the best I can get is the light working pretty stable, but at maximum of 70% brightness. Please would you be able to think of a solution for the following: I have a 5v 2.5A LED Light I want to get powered through a USB C PD battery bank. If you want to get into USB-C Power Delivery to play around with getting higher voltages and wattages, here’s an development board from Sparkfun that may suit your needs, good to up to 100W.ĭear Kristof, thank you for sharing your knowledge with all us! I am not a pro in the electrical world, but always very much interested in doing some fun little projects! I have a bit of a problem I thought you might be able to help me to solve. It would not be advisable to go to market with a device that has the USB Type-C port and a resistor asking for 3A without ability to sense the CC Port voltage and draw less current if needed, especially because of how prevalent legacy adapters are currently in use, but if you built your circuit and know the capabilities of your power source, may your LEDs shine ever brighter and your lithiums charge faster. An engineer over a Google has well documented the results of manufacturers that hack the USB Type-C spec to negative results, sometimes catastrophic. One thing that is not recommended to ever do is use or build USB-A Male to USB Type-C adapter cables that have the Rd resistor built in to spoof the specification to draw 3A. Digi-Key PN: F6127CT-NDĪlong the lines of being a little sketchy, it’s worth mentioning there are some less than reputable manufacturers out there that have used the USB Type-C standards outside of intended specification. Here’s a 2.5A Fast Blow Fuse, just throwin’ that out there, you know, no reason. Lower gauge wire and thin circuit board traces can’t handle 3A, so pay attention to what you’re doing inside that circuit. It should also be noted companies like TI, STMicroelectronics and Cypress have USB Type-C controller solutions that can do all of this for you. Together they form a voltage divider that would give you the above Rp/Rd Connection voltages, so you could play around with the pull-up resistor values on your UFP for Rd if your circuit needs only 1.5A or 500mA. Normally your UFP and DFP would have methods of sensing the CC ports voltage to adapt and act accordingly. The end device, or UFP has resistor values for Rd. Your power source, or DFP has resistor values for Rp. Image Sources provided by Microchip Application Note: AN1953 To illustrate this as an example Sparkfun has a USB-C breakout board that has the two resistors needed to pull up to 3A from the USB-C source power supply, here’s the part and the schematic: What I’m telling you is just slap two 5.1K 1% resistors on both the CC lines tied to ground on the connector of your end device and now you got 5V at up to 3 Amps and let 'er buck. This communication goes both ways, USB Type-C standards also has a specification standard for the power source, or Downward Facing Port (DFP) using two resistors to tell your end device what amount of current can be sourced, but we’re not really getting into that.Īlso USB Power Delivery(PD) has a standard digital handshake devices and their power sources can use to negotiate to raise the power above 5V for higher wattage and current, that’s separate from this and we’re not going to talk about that neither. In fact, up to 50% of display power consumption* can be conserved by InstaShow ® activating Blank Mode when used in conjunction with a BenQ projector.What I’m writing about today is a simple way to get 5V at up to 3A, power supply permitting using the USB Type-C standards for current sinking end devices from just two resistors on the USB-C connector on your end device, otherwise known as Upward Facing Port (UFP) This reduces corporate TCO not only from power savings and extended lifespan from the InstaShow ® device, but from meeting room displays that are left running unused as well. In addition, InstaShow ® can be configured to enter Network Standby when there is no source activity within a user-defined timeout, cutting HDMI transmission and triggering sleep modes on connected display devices, which simply need to be turned back on when the presentation or meeting resumes. This is especially useful when InstaShow ® is ceiling mounted. ![]() When the display device is turned back on, InstaShow ® also wakes up automatically without the need for a separate remote control. ![]() First, HDMI Standby cuts InstaShow ®’s power consumption to near zero after the connected device is turned off, extending InstaShow ®’s lifespan. InstaShow ® offers multiple ways that users may select via web management to conserve energy for eco-conscious corporations. ![]()
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