I'm using the ICL7660 charge pump converter to increase from 9v to 18v. I achieved this making the positive volt doubler circuit shown in the datasheet. I'm using 2 1n5817 schottky diodes because of the low voltage drop, so it came around 17 volts on the output of the volt doubler circuit.
My problem is, when checking the output voltage of 17v with my multimeter, the voltage fluctuates up and down, not staying at 17v accurately. It randomly changes voltages and current above and below 17v. This happens only when I apply the load.
How can I stabalize the voltage output to stay at 17 volts on the output of the voltage doubler circuit at the same time I have a load to it? I was thinking to use a TL494 PWM for this issue, but I am not sure if I should place the PWM before or after the charge pump.
Any ideas would be appreciated.
For some reason the picture for the volt doubler of the ICL7660 is not uploading. It is in the datasheet though.
https://www.intersil.com/content/dam/Intersil/documents/icl7/icl7660.pdf
tl494
https://www.ti.com/lit/ds/symlink/tl494.pdf
My problem is, when checking the output voltage of 17v with my multimeter, the voltage fluctuates up and down, not staying at 17v accurately. It randomly changes voltages and current above and below 17v. This happens only when I apply the load.
How can I stabalize the voltage output to stay at 17 volts on the output of the voltage doubler circuit at the same time I have a load to it? I was thinking to use a TL494 PWM for this issue, but I am not sure if I should place the PWM before or after the charge pump.
Any ideas would be appreciated.
For some reason the picture for the volt doubler of the ICL7660 is not uploading. It is in the datasheet though.
https://www.intersil.com/content/dam/Intersil/documents/icl7/icl7660.pdf
tl494
https://www.ti.com/lit/ds/symlink/tl494.pdf
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