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Hv-nixie-dc-dc-switching-power-supply

4 years ago 2531
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Description

Nixie tubes need about ~180Vdc to light up and thus on most devices a DC-DC converter is needed. We designed here a simple DC-DC switching regulator capable of powering most of Nixie tubes. Description The module is based on the MAX1771 Step-Up DC-DC Controller. This controller works up to 300kHz switching frequency and that allows the usage of miniature surface mount components. It accepts an input voltage from 2 to 16.5V and the output is factory configured to 12V. In this module the output voltage is configured higher at ~180Vdc using external resistors and a potentiometer.

The MAX1771 is driving an external N-channel MOSFET and with the help of the inductor and a fast diode, high voltage is produced.

MOSFET has to be low RDSon, Diode has to be fast Mttr, typically < 50nS and capacitors has to be low ESR to have good efficiency.

From:http://www.electronics-lab.com/project/hv-nixie-dc-dc-switching-power-supply/ enter image description hereenter image description here

Documents

hv-nixie-dc-dc-switching-power-supply

HV NIXIE DC-DC SWITCHING POWER SUPPLY

BOM

ID Name Designator Footprint Quantity
1 MAX1771 U1 SOIC-8 1
2 100n C1,C3 C1 2
3 100u C2 C1 1
4 SIP2 P3,P2 HDR1X2 2
5 10k R1 TRIM_POT_PTH 1
6 10k R2 C0805 1
7 1M5 R3 C0805 1
8 4.7u,250V C4 CP_8X13MM 1
9 100n,250V C5 CP_8X13MM 1
10 IRF644 Q1 TO-220AB 1
11 ES2F D1 DO35-7 1
12 4.7u/250V C6 CP_8X13MM 1
13 1k R4 R3 1
14 100uH/18A L1 INDUCTOR-1206 1

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