Getting +15V and -15V from a +12V in PCB

[tramu]

Hi,

I want to get +/-15V DC to power an IC which requires both +15V & -15V voltages.
But, I have to get +/-15V DC from +12V source available on a PCB.

Please help in this direction like companies who makes convertor ICs to convert 12V to +/-15V or how to do it in PCB.

Thanks in advance for any words of wisdom.

Regards,
Thulasi

 

[betwixt]

There are many suppliers but you do not say which country you are in.
Here is one link, the company have distributors in most countries:

Your Search Results | Farnell United Kingdom | Results

It's one long link, if you can't use it, go to Farnell / Electronic Component Distributors / Suppliers / Electronics, Electrical Parts, Electrical Components and Wholesale Electronics. instead and enter "DC-DC" in the search box, it will open a page where you can specify the input voltage and output voltages you want before it searches the catalog.

Brian.

 

[kevin_PCB]

maybe LM2576 can be helpful

 

[tramu]

Hi,

Please find the data sheet from murata power supply.


I have the following queries.

1. The output current rating of Dual output voltage(NDTD1215C) converters are specified as +/-100mA.
Does it mean, +15V output line will supply 100mA current, and -15v line will supply another 100mA current? please explain why the output current is rated as +/- ?


2. Why is the minimum load current is specified as +/-25mA ? Why is it required ?


Please answer my queries.

Thanks in advance for any words of wisdom.
Thulasi

 

[betwixt]

1. Yes, both outputs will supply 100mA. The +/- refers to the direction of current which will be opposite from the positive to the negative outputs.
2. There is an explanatiopn on page 4 of the data sheet. The internal circuitry on some models becomes unstable if the load is less than 0.25 of the maximum. Only the manufacturer knows why but I would guess it's something to do with the way the internal regulator works.

Brian.