Hi, I have encountered some difficulties with the HV507, a low-voltage to high-voltage serial-to-parallel converter with 64 push-pull outputs. I have been using a boost converter to convert the voltage from 12VDC to approximately 220VDC, which is then connected to the High-voltage power supply pins (pin 25 and pin 40) of the HV507. Unfortunately, the HV507 has consistently burned out, typically starting at the High-voltage power supply pin and spreading to the surrounding pins. Despite my attempts to fix the PCB and re-solder it several times, the issue persists. Hopefully someone can help. Many thanks.
Here is the boost converter i used.
NIXIE-Power-Supply-Datasheet-EN-v1.0.0.pdf (nixieclock.org)
Here is my schematic
Print Schematic.pdf (90.8 KB)
Sorry sir, but I don’t get it, can you explain for me
here is a list of inverters that are 12v dc to AC
But I don’t need to find a DC-AC boost converter. I’m asking about HV507 damage when I apply power supply 
ok I am sorry I read your question incorrectly I going to ask for help on this it may take some time
Burning out an IC is usually a result of violating its specifications in some way; voltage, current, or a combination of the two (power).
Assuming (perhaps incorrectly) that the output of your HV supply is well-regulated with minimal ripple, a 220V setting should offer a pretty good safety margin to the 300V limit of the '507. There will likely be brief periods of high current flow when new output states are latched however, which could cause ringing on the HV supply due to the parasitic inductance of the supply leads, and this ringing may cause the voltage limit of the chip to be exceeded. A bypass capacitor near the leads of the IC would likely help in this case, and adding some resistance to the HV supply may help as well.
Those current flows during switching events would be something to investigate, as well as steady-state power dissipation in the chip as a result of the loads’ current draw. The HV outputs of the chip may have a resistance approaching 35kΩ, and with 64 outputs it wouldn’t take much load on each before the thermal limits of the chip are exceeded.
1 Like
In addition to Rick’s comments, the power up/down sequence MUST be followed. I don’t see any control of the SHUTDOWN pin for the high voltage boost converter by the Arduino in your schematic. It should not be turned on until Vdd and all inputs for the HV507 have stabilized.
From HV507 datasheet:
Improper sequencing can also kill it.
1 Like
thank you for your support, I followed your suggestion, I tried to set up all the inputs first by Arduino, however it still burned right after I plug the charger. So, I think the major problem is from the boost converter I used.
