USB-C PD trigger + meter (ZY12PDN)
USB-C PD sink (trigger board) · requests 9 V · 5.1 kΩ Rd on CC · built-in V/A meter and 0–3 A load · OUT+/OUT− screw terminals switched on when the contract is met
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: ZY12PDN-style PD trigger with USB meter
Pins
- USB-C port (in)
- OUT+
- OUT−
Ratings and limits
| Input | 5–20 V USB-C PD |
|---|---|
| Output | the requested voltage, up to 5 A |
| Rd | 5.1 kΩ on CC |
How to use it
Get 9/12/15/20 V from a USB-C laptop charger to power a router, LED strip or soldering iron. If the charger does not offer the requested voltage, the output stays off.
Lessons and builds that use it
- USB cable voltage drop
- USB Power Delivery: asking for 20 V
- Charging a phone from 12 V with an HW-688
- 65 W USB-C PD stage on a ready-made 24 V supply: buck converter, PD controller, load switch (build)
- 65 W USB-C PD charger from scratch: mains flyback (UC3844, 800 V MOSFET, PQ2625 transformer), TL431 + PC817 feedback, PD controller (build)
- Real device: phone charger, 220 V AC wall to 5 V USB (build)
- Real device: laptop charger, 220 V AC wall to 20 V with PFC (build)