BLF driver DDm-Y3 [rev00a][tried & tested]
author: DEL
2 layer board of 1.02 x 0.89 inches (25.9 x 22.6 mm)
Uploaded:
January 16, 2017
Shared:
January 17, 2017
Total Price:
$4.50
BLF flashlight driver for Yezl Y3, DD+m
Features
- 23 mm direct drive + 350 mA regulator LED driver
- R5 to eliminate unintentional Vcc boosting during PWM.
- R3, R4 for stable drive of FET.
- Oversized heat plane for the 7135 with good thermal link to the ground ring.
- Generous 0603 pad sizes that will accept 0805 parts as well.
- Universal package size for MCU. Tiny13-85 fits.
Revision changes
- New
Suggested parts list
- U1: Atmel Attiny25, SSU or SSN package
- U2: 7135 350 mA LED driver
- Q1: Vishay SiR800DP
- C1: 10 uF, X5R or better, 0805
- D1: Schottky diode, 200 mA 20 V or better, 0805 or SOD323
- R1: 22 / 330 kohm, 1%, 0603 (R1, R2 larger values for e-switch lights)
- R2: 4.7 / 100 kohm, 1%, 0603
- R3: 100 kohm, 5%, 0603
- R4: 47 ohm, 5%, 0603
- R5: 4.7 ohm, 5%, 0603
Tactile switch is Digikey part no:
- EG4389CT-ND
- or EG4388CT-ND
BLF flashlight driver for Yezl Y3, DD+m
Features
- 23 mm direct drive + 350 mA regulator LED driver
- R5 to eliminate unintentional Vcc boosting during PWM.
- R3, R4 for stable drive of FET.
- Oversized heat plane for the 7135 with good thermal link to the ground ring.
- Generous 0603 pad sizes that will accept 0805 parts as well.
- Universal package size for MCU. Tiny13-85 fits.
Revision changes
- New
Suggested parts list
- U1: Atmel Attiny25, SSU or SSN package
- U2: 7135 350 mA LED driver
- Q1: Vishay SiR800DP
- C1: 10 uF, X5R or better, 0805
- D1: Schottky diode, 200 mA 20 V or better, 0805 or SOD323
- R1: 22 / 330 kohm, 1%, 0603 (R1, R2 larger values for e-switch lights)
- R2: 4.7 / 100 kohm, 1%, 0603
- R3: 100 kohm, 5%, 0603
- R4: 47 ohm, 5%, 0603
- R5: 4.7 ohm, 5%, 0603
Tactile switch is Digikey part no:
- EG4389CT-ND
- or EG4388CT-ND
