A Low Cost Regulated Voltage Doubler Part 1 of 2

http://www.microchip.com/analog Walk through the basics of a charge pump circuit. Each components significance is highlighted using a series of slides that show both the schematic and output waveforms. Next, a pulse train is applied to the circuit to create a voltage doubler. Intelligence is later incorporated using a comparator peripheral on a PIC Microcontroller to regulate output voltage. All equations required to build the circuit are discussed as well as derivations and importance. Finally, using the same components, a voltage inverter is created to show some alternate configurations.

Category:

Science & Technology

Tags:

• microchip
• technology
• pic
• mcu
• microcontroller
• circuit
• pump
• embedded
• control

[elpedorro2]

I GOT LOST WHEN  YOU PUT THE 2 VOLT BATTERY AND THE BANANA AT THE OTHER END?

[rsp196607]

The page heading at 4:00 says "Equivalent Series Resistance" (ESR). But the plot on that page shows as much the effect of equivalent series inductance (ESL) as of ESR. It is the ESL that causes the phenomenon pointed out in the annotation, that "At higher frequencies the impedance will being to increase."

[nikemoto2511]

Hello I've also built this charge pump using a baseline PIC- there is feedback, just inlined 2 LEDs for voltage control.

It works for the app- only one extra volt is needed, less than 1 mA.

It is even more simple than in the video.

I've even recorded the noise from the digital I/O charge line.