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22mm Single-Sided FET Driver PCB - V1.3b - MTN-22DD

22mm Single-Sided FET Driver PCB - V1.3b - MTN-22DD
22mm Single-Sided FET Driver PCB - V1.3b - MTN-22DD
Product Code: MTN22DD-PCB-V1.3b
Availability: 32
Price: $1.25
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This is the bare PCB you need to build your own 22mm FET driver!  DIY parts kit available here.  

This PCB allows for quite a few options---many of which are optional.  It can be run in normal single-cell configuration, zener mod configuration for 2S-4S cells, or with an LDO voltage regulator for 2S cells and momentary use.  

This PCB also has optional provisions for an integrated temperature sensor and PWM output for powering other boards (custom firmware required).

The 1.13b revision allows for easy spring bypass with a central hole that will allow the positive LED wire to pass directly through the center of the board.

Parts Required (1S Cell):

  • FET: LFPAK56 N-Channel Mosfet
  • D1:  SOD-323 Schottky diode
  • C1:  10uF MLC capacitor, 0805 (X7R preferred)
  • R1:  19.1K, 1% resistor, 0805
  • R2:  4.7K, 1% resistor, 0805
  • UI:  ATTINY13A MCU, SSH or SSU variant
  • Spring / LED leads
  • OTC:  1uF MLC capacitor, 0805 (X7R preferred)
    • Pad with side closest to MCU can also be used as electronic switch pad (no OTC installed).

Parts Required (2S-4S Cells - Zener Modified):

  • FET: LFPAK56 N-Channel Mosfet
  • D1:  200 ohm 0805 resistor
  • C1:  10uF MLC capacitor, 0805 (X7R preferred)
  • R1:  36K, 1% resistor, 0805
  • R2:  4.7K, 1% resistor, 0805
  • Zener Diode:  SOD-123 4.3v
  • UI:  ATTINY13A MCU, SSH or SSU variant
  • Spring / LED leads
  • OTC:  1uF MLC capacitor, 0805 (X7R preferred)
    • Pad with side closest to MCU can also be used as electronic switch pad (no OTC installed). ELECTRONIC SWITCH NOT RECOMMENDED WITH ZENER MOD.  LDO PREFERRED.

​​

Parts Required (2S Cells - LDO):

  • FET: LFPAK56 N-Channel Mosfet
  • D1:  EMPTY
  • C2:  10uF MLC capacitor, 0805 (X7R preferred)
  • C_LDO: 10uF MLC capacitor, 0805 (X7R preferred)
  • LDO:  AP2204K 5V or similar.
  • R1:  36K, 1% resistor, 0805
  • R2:  4.7K, 1% resistor, 0805
  • UI:  ATTINY13A MCU, SSH or SSU variant
  • Spring / LED leads
  • OTC:  1uF MLC capacitor, 0805 (X7R preferred).  Not needed for momentary firmware use.
    • Pad with side closest to MCU can also be used as electronic switch pad (no OTC installed). ELECTRONIC SWITCH NOT RECOMMENDED WITH ZENER MOD.  LDO PREFERRED.

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