patingin Posted July 4, 2010 Report Share Posted July 4, 2010 hi guys! does anyone know how to compute for the value of the external capacitors of max232? i know it is in the datasheet but how it was computed? Quote Link to comment Share on other sites More sharing options...
Hero999 Posted July 4, 2010 Report Share Posted July 4, 2010 It uses a circuit known as a charge pump to generate a higher voltage from the power supply.The capacitor values depend on many factors, here's an article which discusses how to calculate them.http://powerelectronics.com/passive_components_packaging_interconnects/capacitors/power_calculating_chargepump_circuits/ Quote Link to comment Share on other sites More sharing options...
Kevin Weddle Posted July 20, 2010 Report Share Posted July 20, 2010 The capacitors have to be able to deliver the required voltage to the load, which requires a capacitance that will charge to the voltage within the charge time and maintain the voltage until the next charging time. Quote Link to comment Share on other sites More sharing options...
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