Positive-input-negative-output-charge-pump


Posted on Jan 20, 2013

A charge pump is a simple means of generating a low-power voltage supply of opposite polarity from the main supply. The 74Cl4 IC is a self-oscillating driver for the MOSFET power switch. It produces a pulse width of 6.5 p,s at a repetition frequency of 100 kHz. When the MOSFET device is off, capacitor C is charged to the positive supply. When the power through the MOSFET switches on, C delivers a negative voltage through the series diode to the output.


Positive-input-negative-output-charge-pump
Click here to download the full size of the above Circuit.

The zener serves as a dissipative regulator. Because the MOSFET switches fast, operation at high frequencies allows the capacitors in the system to be small.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Leak Detector
250Watt sub-woofer amplifier
Dot matrix LED display
serial LCD interface for PIC
2 LED flasher with two 2N3904 transistors
12V 10Amp MJ2955 Switching Power Supply
Water Flow Gauge using Arduino
How Do LED light bulbs works on Mobile Phone Circuit
sound Circuits
simplest led flasher



Top