ET-P21
PT4115 LED Driver 670 mA
Constant-current driver for 1–8 power LEDs, PWM dimming
AED 49.00
Out of stockOverview
Constant-current driver for 1–8 power LEDs, PWM dimming
The ET-P21 is built around the PowTech PT4115 — hysteretic buck constant-current LED driver, 6–30V in, up to 1.2A (set to 667mA on this board). It runs from 6–30V on a screw terminal.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- 3 W power LED lamps
- Aquarium and grow lights
- Dimmable torches
Key features
What makes it different
Driver
PowTech PT4115: hysteretic buck constant-current LED driver, 6–30V in, up to 1.2A (set to 667mA on this board)
LEDs
1–8 white LEDs in series (LED string voltage ≥ ~2V below VIN), e.g. 3W / 5W power LEDs
Control
PWM or analog dimming on DIM, 3.3/5V logic
Supply
6–30V on a screw terminal
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Driver | PowTech PT4115: hysteretic buck constant-current LED driver, 6–30V in, up to 1.2A (set to 667mA on this board) |
|---|---|
| LEDs | 1–8 white LEDs in series (LED string voltage ≥ ~2V below VIN), e.g. 3W / 5W power LEDs |
| Control | PWM or analog dimming on DIM, 3.3/5V logic |
| Supply | 6–30V on a screw terminal |
| Size | 30.0 × 20.0 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 3-pin 2.54 mm header · Screw terminal 2P 5.0mm 17A (THT) — VIN 6–30V · Screw terminal 2P 5.0mm 17A (THT) — LED+ / LED− |
| Main IC | PT4115B89E-B (LCSC C15425) |
| Revision | Rev A |
| Libraries | Any PWM output; ESPHome ledc + monochromatic light |
|---|
Performance
Output
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIO | Power | Not connected (keeps 3-pin cable order) |
| 2 | GND | Ground | Ground |
| 3 | DIM | Signal | PWM 100Hz–20kHz: high = on; float = full; <0.3V = off |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-P21 PT4115 LED Driver 670 mA (assembled)
- 1 × 3-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIO, GND, DIM
- Libraries: Any PWM output
Compare
Which power board?
| PT4115 LED Driver 670 mA (this board)This board | ET-P22 USB-C 2S Li-ion Charger | ET-P23 LM317 Adjustable Regulator | ET-P24 TPS25947 eFuse Protector | |
|---|---|---|---|---|
| What it does | Constant-current driver for 1–8 power LEDs, PWM dimming | Charge a 2S (7.4 V) pack from any 5 V USB-C charger | Clean adjustable 1.25–28 V linear supply, 1.5 A | Resettable electronic fuse with adjustable current limit |
| Interface | PWM or analog dimming on DIM, 3.3/5V logic | USB-C 5V (any USB-C charger; 5V/2A or more for… | Vout + 3V … 35V | EN input, PG output |
| Best for | 3 W power LED lamps | 7.4 V robot packs | Bench reference voltages | Protecting 12 V projects from shorts |
| Price | 49 AED | 19 AED | 15 AED | 49 AED |
Downloads
Documents and design files
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