Voltage doubler Capacitance values

jmakwana 30 days ago

I have an astable multivibrator that produces 5v square wave input to the push-pull and the voltage doubler part of the circuit. Now somehow the simulation works at 0.1uF capacitors for the voltage doubler, but I do not understand how to select the values for the capacitor when I have an input at 32.3kHz.my max current load will be 60mA. I am essentially building this to power Opampms in my circuit....OPA4140

I have the screenshot in a zip file too if you cant see via the link

0 jmakwana 30 days ago

Screenshot (1496).zip
Cancel
Up 0 Down

Reply

Verify Answer

Cancel
0 retiredEE 19 days ago

This circuit will not double the voltage but comes close if the load current is very low. Fast switching Shottky diodes are a must to keep their drops low and support the high surge currents through them. The input push-pull stage current drive and response time are also important. The following two equations can get you started estimating C3 and C4.

Vout(Avg) = 10 - Vd1 - Vd2 - 60mA / (C3 x 32.3kHz)

Vout(P-P ripple) = 60mA / (C4 x 32.3kHz)
Cancel
Up 0 Down

Reply

Verify Answer

Cancel

Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.

Stats

Voltage doubler Capacitance values

Community Guidelines