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Power supply and filament driver for vacuum fluorescent display (VFD)

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Power supply for VFD

Features

Main parts of the VFD power supply: inverting buck-boost converter on TPS54360 (supposed to use with ICs like PT6311 and etc) and filament driver on LM4871.

Inverting converter:

  • Input voltage: 5V
  • Output negative voltage: -15V to -30V
  • Output current: 250mA @ 5V in

Filament driver:

  • Input voltage: 5V
  • Output voltage: 5 to 0 (dummy resistors to regulate)
  • Output power: 2W @ 5V in

Board

Schematic and pcb layout created in KiCad 6 Nightly Build (compatible with KiCad 5).

schematic pcb top pcb bottom

Notes

  • misc folder contains some calculation and simulation sheets for several IC to get negative voltages

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Power supply and filament driver for vacuum fluorescent display (VFD)

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