BLF driver DDm-M6/SRK [rev02a][untested]

by DEL.
Top
Bottom

2 layer board of 1.82x1.82 inches (46.20x46.20 mm).
Shared on January 9th, 2017 12:05.

BLF flashlight driver for M6/SRK lights, DD+CC

Features

  • 46 mm diameter.
  • Two channel output: Direct drive + current regulator LED driver.
  • R5, R3, R4, C2 for enhanced stability.
  • Oversized heat plane for the 7135s with good thermal link to the ground ring.
  • Generous 0603 pad sizes through-out that will accept 0805 parts as well.
  • Universal MCU pads, Tiny13-Tiny85 all fit.
  • Generous wire pads for emitters, e-switch and side indicator LED.

Revision changes

  • Added pads for up to eight 7135 regulators
  • Up-size C1, D1 pads to 0805
  • Add C3 for optional load decoupling

Suggested parts list

  • U1: Atmel Attiny25, SSU or SSN package
  • U2-U9: 7135 350 mA LED driver
  • Q1: Vishay SiR800DP
  • C1: 10 uF, X5R or better, 0805
  • C2: 100 nF, X7R or better, 0603
  • C3: Optional, 10 uF, X5R or better, 0805
  • D1: Schottky diode, 200 mA 20 V or better, 0805 or SOD323
  • R1: 330 kohm, 1%, 0603
  • R2, R3: 100 kohm, 1%, 0603
  • R4: 47 ohm, 5%, 0603
  • R5: 4.7 ohm, 5%, 0603

Order board. Download. Permalink. Embed order link.

Copy this HTML into your page to embed a link to order this shared project