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I want to generate -10v. how can i generate it

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Re: -10v generation......

thanks friend. I got this IC.

I have one question that if i am giving reverse bias to device that wanted. than device will automatically get negative voltage or not?
 
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    hd.

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Dear hiren
Hi
DC or AC ? from what source ? how much is your input voltage ? how much current do you need ? if you mention these parameters i can help you as well .
Best Wishes
Goldsmith
 

Re: -10v generation......

davoud said:
Hi
You can build it by LM337
https://www.edaboard.com/threads/73370/
Click to expand...

Although the original post is unclear as to the input voltage, "generate" implies that the author wants to generate a negative voltage from a positive voltage supply, not simply regulate an existing negative voltage.

Can you elaborate a little more on how the LM337 will generate a negative voltage from a positive supply? The datasheet does not show that application.

John
 

Dear John
Hi
I think you are right . if the author wants to convert a positive voltage to a negative voltage , , can use a simple buck boost converter . but if the author doesn't need high currents , he will be able to use a simple multiplier with diode and capacitor ! isn't it ?
Best Regards
Goldsmith
 

There are numerous chips for generating negative bias, such as the ICL7660/7660A that is a switched capacitor device.

If he is using this with a microcontroller, e.g., for GLCD bias, then one pin can be used to drive a simple charge pump. A typical circuit is shown in the New Haven Display application note, "Voltage Generating Circuits for LCD Contrast Control." Unfortunately, I do not have a direct link handy to supply for that document. As its title would suggest, that document also shows several other approaches.

Here is the schematic for the charge pump:
23_1340314613.png


John

Edit; Just to keep everything in one post, here is the NHD link: https://www.newhavendisplay.com/app_notes/LCD_Contrast_Voltage_Circuits.pdf
 
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Humm , your suggested circuit seems pretty good ! but if he needs high value of currents it can't be good . for example 10 amperes ! the main problem is that he didn't mention the exact specifications .
Respectfully
Goldsmith
 

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