Flashlight driver board (AMC7135)
Linear constant-current flashlight driver · 8 × 350 mA regulator chips = 2.8 A · modes high / medium (35 %) / low (8 %) / strobe, half-press the tail switch to step · steps down to low below 3.0 V · 1 cell (2.7–4.2 V)
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: Flashlight driver (linear, AMC7135-type chips)
Pins
- B+ (spring)
- B− (ring)
- LED+
- LED−
Ratings and limits
| Current | 2.8 A (8 × 350 mA) |
|---|---|
| Input | one Li-ion cell, 2.7–4.2 V |
| Modes | high, medium 35 %, low 8 %, strobe |
| Loss | (cell − LED voltage) × current, as heat |
How to use it
Sits in the back of the flashlight head: spring to the cell +, ring to the body (cell −), two wires to the LED star.
Lessons and builds that use it
- Rechargeable flashlight: 21700 cell, USB-C TP4056, clicky switch, 2.8 A driver and a 10 W LED (build)