# Non-insulated DC/DC negative voltage

#### srecenvid

Joined May 10, 2018
31
Hello everyone,

I am currently working on project requiring +15 and -15VDC 10A. Checking option I decided to use
i6A4W020A033V-001-R (manual)

this is non-isolated dc-dc Buck/Step-Down Converter. I am not sure if I can use this converters as I intend to. Is this even possible, or I have to use more expensive isolated DC/DC converters?

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#### Ian0

Joined Aug 7, 2020
4,821
Not going to work - all the GND terminals are internally connected.

A Čuk converter will give you a negative output voltage from a positive input voltage.

#### srecenvid

Joined May 10, 2018
31
Not going to work - all the GND terminals are internally connected.

A Čuk converter will give you a negative output voltage from a positive input voltage.
Any suggestion which components to use to get at least 10A -15VDC?

#### BobTPH

Joined Jun 5, 2013
4,738
What is the source of 24V? A center tapped 24V transformer can give you ±15V.

Bob

#### AlbertHall

Joined Jun 4, 2014
11,952
Not going to work - all the GND terminals are internally connected.
Unless the two 24V supplies are not connected to each other. If it is one 24V supply then it won't work.

#### BobTPH

Joined Jun 5, 2013
4,738
Why not get DIN rail supply with the correct outputs?

Bob

#### srecenvid

Joined May 10, 2018
31
Do You seriously need a ~300-Watt Split-Supply ?
Or are You just building-in plenty of overhead ?
I'd be very interested to find out what You intend to power with this.

~$103.oo each, You'll need 2 .................. https://www.digikey.com/en/products/detail/semiconductor-circuits-inc/CPC10C48/13153146 http://www.dcdc.com/PDF/CPC_2-1_Brief_R1.pdf . . . Yes, its requirement for laser scanner. We are upgrading scanner with 2axis which requires 5A per axis -15 +15. So at the end we need this. Thread Starter #### srecenvid Joined May 10, 2018 31 Why not get DIN rail supply with the correct outputs? Bob We are already using circuit with all connectors, all we have to do is upgrade power requirements from 6A to 10A. Thread Starter #### srecenvid Joined May 10, 2018 31 Thread Starter #### srecenvid Joined May 10, 2018 31 Do You seriously need a ~300-Watt Split-Supply ? Or are You just building-in plenty of overhead ? I'd be very interested to find out what You intend to power with this. ~$103.oo each, You'll need 2 ..................
https://www.digikey.com/en/products/detail/semiconductor-circuits-inc/CPC10C48/13153146
http://www.dcdc.com/PDF/CPC_2-1_Brief_R1.pdf
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.
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CN200A110-15 TDK-Lambda | Mouser Europe
or
CHS3002415 Cosel USA, Inc. | Power Supplies - Board Mount | DigiKey
could also work, but I was hoping to get something closer to 50-60eur...