Author Topic: HP HSTNS-PD43 PSU Hack & Feedback Circuit (Partial)  (Read 8930 times)

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Offline dragospd

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  • Posts: 1
  • Country: ro
Re: HP HSTNS-PD43 PSU Hack & Feedback Circuit (Partial)
« Reply #50 on: December 26, 2024, 09:47:58 pm »
Hi Stanislav,

Hi Zheka,

Connections:
- SIG1 - A9
- SIG2 - upper node of 05C resistor at B9
- SIG3 - D5 (MC3-1)

This is from my memory but I can double check it if anyone needs it.

I'm trying to use your schematic so I can modify my unit to 14.6V. Not very clear for me where SIG2 should be wired. I see in the original schematic that 05C is located in B12 and not B9 right? Can you please check?

Thanks, Dragos
 

Offline stanislav

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  • Posts: 3
  • Country: ua
Re: HP HSTNS-PD43 PSU Hack & Feedback Circuit (Partial)
« Reply #51 on: December 28, 2024, 10:11:41 am »
You're right, it's B12 not B9

here's how it looks on my psu

2471221-0

red - SIG1
white - SIG2
yellow - SIG3

There're multiple places to connect SIG2 but this one feels the most convenient as it's in the upper part and the wire doesn't interfere with other components.
« Last Edit: December 28, 2024, 10:16:26 am by stanislav »
 

Offline pawel3410

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  • Posts: 1
  • Country: pl
Re: HP HSTNS-PD43 PSU Hack & Feedback Circuit (Partial)
« Reply #52 on: January 22, 2025, 06:25:01 am »
Hello.
First of all I wanted to thank you for posting useful information.
I have no experience in such modifications, but I would like to include voltage regulation in this power supply in the range of approximately 10-12 to 14V to reduce the current at the beginning of charging when connecting a discharged battery.
If I understand correctly, you need to increase the OVP by adding 16kOhm (OVP = 14.5V), and possibly a resistor for the UVP.
However, what potentiometer should be used (new mounted on the housing) to regulate the voltage and what additional resistor should be used for it?
 


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