How to generate 10.4V and 9.3V from 16V

chenbingjy

How to generate 10.4V and 9.3V from 16V [Copy link]

 

Could you please tell me how 16V can generate 10.4V and 9.3V? 10.4V has a maximum current of 50mA, and 9.3V has a maximum current of 200mA. Thank you!

chunyang

Adjustable voltage-regulated power supply, both switching and linear are fine, and there are many models to choose from.

qwqwqw2088

If you want to make a backlight, it is recommended to find a charge pump IC chip with 2 outputs.

Jacktang

Please think carefully, for reference only

maychang

"Today is the weekend, I am going to degenerate..." tianxj01 has already proposed a good plan on the 60th floor of that post.

maychang

"How to generate 10.4V and 9.3V from 16V?" Simply put, use Buck circuit, there are dedicated chips. "Use an MP1593" as proposed by tianxj01 is very good.

chenbingjy

Thank you all

philips_lu

Go to TI's official website, list your requirements and they will give you a complete solution, which is free.

xiaowai90

I just came here to take a look.

shipeng

Brother, your posts always attract a lot of experts. You are really good at it: congratulate:

maychang

chenbingjy posted on 2018-11-18 17:38 Thank you all

From your other post, I can see that the 9.3V power supply is used for LCD backlight. Considering that many applications require the backlight brightness to be adjustable, or the backlight can be turned off, this power supply is better to have an adjustable constant current output rather than a constant voltage output, because the brightness of the light-emitting tube is approximately proportional to the current, and the relationship with the voltage is approximately an exponential function. If an adjustable voltage output is used, the voltage is difficult to control.

szkalwa

These are some classic power supply circuits used by Innolux 7-inch screens!

luck_gfb

Use linear voltage regulator circuit, the lowest cost and good voltage regulation effect