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help needed regarding dual output DC-DC Converter

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yviswanathbe

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Hi,

I need dual output Dc-Dc converter.

Input Voltage--->+6V (from battery)
Output1-------->+12V @ 50mA
Output2-------->-12V @ 50mA

Can somebody suggest me with the part number or readily available module.

Thanks and Regards,
Viswanath.
 

Hi arun,

Thanks for your reply.

The datasheet you provided will do the job, but it seems the price of the ic's are too high for me.

I am looking for low cost solution.

any other suggessions please?

Thanks and Regards,
Viswanath.
 

HI friends,

Thanks for your replies.

I just got the following link on negative voltage power supply.

I hope this could be low cost solution.

555 Negative Voltage Power Supply Circuit

i will try it and get back to you if i need any assistance.

Thanks and Regards,
Viswanath
 

Before start testing the circuit you need to consider there is a small loss due to the diode losses, and additional losses in the 555's transistor switched output, so the output voltage is lower than expected, at 6V power supply this may be around -4V.

---------- Post added at 09:30 ---------- Previous post was at 09:23 ----------

A more useful circuit:
**broken link removed**
5VDC to +12V and -12V Isolated dual Switching Regulator with LM2587 | Circuit Project
 

For modular solutions, this is probably the best you can do:
**broken link removed**

If you want it in even less than $10USD, then you'll have to make your own circuit.

Also consider the possibility of generating just the +12V rail, then generating the -12V rail from that using an inverting charge pump. At low current levels charge pumps can be very cost effective. You could even generate everything with charge pumps, if you don't mind poorer regulation.
 

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