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Posts Tagged ‘Current sense’

App note: Current sense amplifiers in class-D audio subsystems

Sunday, May 27th, 2018

App note from Texas Instruments about output current sensing in class-D amplfiers. Link here (PDF) Current sensing in audio subsystems are widely used in conjunction with CLASS-D amplifiers for diagnostics or to provide speaker current feedback to the DSP for speaker enhancement to emulate smartamp. The most expensive component in...

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App note: Current-sense amplifier doubles as a high common mode instrumentation amplifier

Sunday, December 10th, 2017

Application note from Maxim intergrated on utilizing a boost converter and a current-sense amplifier to form a regulator that derives +5V from -48V without isolation. Link here (PDF) Instrumentation amplifiers (IAs) are used where gain accuracy and dc precision are important, such as in measurement and test equipment. The downside...

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App note: Novel current-sense measurement with automatic offset correction

Sunday, September 18th, 2016

Silicon Labs' application note about a low power current measurement circuit using TS1001 nano power op-amp paired with low-power CY8C38 microcontroller, Link here (PDF) Pairing a simple circuit using nanopower analog op amps with a microcontroller can monitor single battery cells and solar harvesters. Pairing up a 0.65 V/1 µA...

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App note: Selection of three locations of current sense resistor in buck converter

Sunday, November 29th, 2015

Sensing current utilizing MOSFET's Rds(on) and Inductor's DCR in different location discussed in this app note from Alpha and Omega semiconductor. Link here (PDF) In current mode converters, current sense resistor can be placed in three locations: input loop, output loop and freewheeling loop. The pros and cons are discussed...

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App note: Common-Mode transients in current sense applications

Sunday, February 1st, 2015

Transient considerations in current sensing especially in motor and solenoids, app note(PDF) from Analog Devices. Current sense amplifiers are used in a variety of applications, such as motor or solenoid control, load current monitoring, and fault detection. In such applications, it is typical for the input common-mode voltage to swing...

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app note: A simple current-sense technique eliminating a sense resistor

Sunday, July 13th, 2014

An old but interesting app note(PDF) from Microsemi on resistorless current-sensing technique. This application note introduces a simple current-sense technique that eliminates that sense resistor, resulting in system-cost reduction, PCB space saving, and power efficiency improvement. Furthermore, the new current sensing mechanism allows higher dynamic tripping current than the static...

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App note: Current sense circuit collection

Sunday, January 13th, 2013

Here's a current sense circuit collection from Linear Technology. The collection is organized by application type and for each one there are a few example circuits. High side, low side, level shifting, high and low voltage, fault sensing, etc: Sensing and/or controlling current flow is a fundamental requirement in many...

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Recent Comments

  • Max: Hey, good job quoting as an abstract something the author writes about someone else's project... For the record, I do appreciate the proper attention to...
  • imqqmi: Also interesting to note that arduino's use the DTR signal to reset the device. I found this out because repetier was able to do this...
  • Kevin: A bit sad that you are using a knock off Saleae device unless you are not using Saleae software.
  • Max: For the Haxxor Edition he could add a Morse-to-scan-code translator to the code in the PIC (where the L337 Haxxor Special also accepts Unicode code...
  • KH: Someone with a PIC16F1459 project, well you don't see these every day. Methinks he repeats the USB 2.0 thing too much; this might mislead people...