Arpit Mehta is an applications engineer with Maxim Integrated Products Inc., Sunnyvale, Calif. He received an MSEE from San Jose State University, Calif. Email address: arpit_mehta@maximhq.com
2 results found for Arpit Mehta, displaying items 1 - 2
October 25, 2007[Ideas For Design] Protect Current-Sense Amplifiers Against Overvoltage Transients
Certain current-sense amplifiers have to contend with frequent overvoltages. For example, a current-sense amplifier that monitors batterydischarge currents in an automobile must withstand high-voltage "load dump" pulses produced when loads are disconnected from the battery. This causes inductive spikes and overvoltages at the output of the alternator. If these pulses exceed the amplifier's common-mode voltage, the amplifier requires external...
February 15, 2007[Ideas For Design] Charge Pump Extends Current-Sense Amplifier's Input Range Down To 0 V
In addition to the traditional lead-acid battery, modern electric/hybrid cars often include a large capacitor (40 F or more) as a backup power source. Located under the rear seat, this capacitor ensures an extra 10 to 15 minutes of driving time that allows you to reach the next charging station or gas station. Lead-acid batteries discharge down to only 8 V or so, but a capacitor can discharge all the way down to 0 V. This capability requires a current-sense amplifier that can...
