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Application Notes

• Download
  Current Sense Circuit Collection &mdash AN105
  PDF, 1.1 Mb, File published: Dec 6, 2005
  Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the techniques to do so are as diverse as the applications themselves. This Application Note compiles solutions to current sensing problems and organizes the solutions by general application type. These circuits have been culled from a variety of Linear Technology documents.
  Extract from the document

  Application Note 105
  December 2005
  Current Sense Circuit Collection
  Making Sense of Current
  Tim Regan, Jon Munson
  Greg Zimmer, Michael Stokowski
  INTRODUCTION
  Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the
  techniques to do so are as diverse as the applications
  themselves. This Application Note compiles solutions to
  current sensing problems and organizes the solutions by
  general application type. These circuits have been culled
  from a variety of Linear Technology documents.
  Circuits Organized by General Application
  Each chapter collects together applications that tend to
  solve a similar general problem, such as high side current sensing, or negative supply sensing. The chapters are titled
  accordingly. In this way, the reader has access to many
  possible solutions to a particular problem in one place.
  It is unlikely that any particular circuit shown will exactly
  meet the requirements for a specific design, but the suggestion of many circuit techniques and devices should
  prove useful. To avoid duplication, circuits relevant to
  multiple chapters may appear in one location.
  L, LT, LTC, LTM, Linear Technology, the Linear logo, Over-The-Top and TimerBlox are …

Design Notes

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  Monitor and Protect Automotive Systems with Integrated Current Sensing &mdash DN374
  PDF, 79 Kb, File published: Aug 24, 2005
  Extract from the document

  Monitor and Protect Automotive Systems with Integrated
  Current Sensing – Design Note 374
  Jon Munson
  Introduction
  An automobile is an unforgiving environment for integrated circuits, where under-the-hood operating temperatures run from –40°C to 125°C and large transient
  excursions on the battery voltage bus are expected. In
  the past, electronics were part of the well-protected and
  centralized Engine Control Unit (ECU), but the trend is
  toward more distributed electronics. Electrically driven
  accessories and fault-protection monitoring functions
  are leaving the protective umbrella of the ECU and
  migrating directly into vehicle subsystems. side type between the load and ground or an H-bridge.
  The circuit is programmable to produce up to 1mA of
  full-scale output current into ROUT, yet draws a mere
  250ОјA supply current when the load is off. For example, many functions formerly driven by the
  engine—via belt and pulley or hydraulics—are now
  electrically driven (motorized), such as water pumps,
  steering mechanisms, brake actuators and various body
  controls. These functions can become a safety risk if they
  are not continually monitored for operational readiness
  and/or have a back-up mode of operation. In either case,
  real-time monitoring becomes necessary and generally
  involves accurately measuring the current draw of each …

Articles

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  Finally, High Voltage Current Sensing Made Easy &mdash LT Journal
  PDF, 572 Kb, File published: Jun 10, 2005
  Extract from the document

  LINEAR TECHNOLOGY MAY 2005 IN THIS ISSUE…
  COVER ARTICLE
  Finally, High Voltage
  Current Sensing Made Easy . 1
  Brendan Whelan, Glen Brisebois,
  Albert Lee and Jon Munson Issue Highlights . 2
  Linear Technology in the News… . 2
  DESIGN FEATURES
  Versatile Buck-Boost Converter
  Offers High Efficiency in a
  Wide Variety of Applications . 8
  Dave Salerno Low EMI, Output Tracking, High
  Efficiency, and Too Many Other
  Features to List in a 3mm x 4mm
  Synchronous Buck Controller . 11
  Lin Sheng Tiny RS232 Transceivers Run
  Directly from Alkaline, NiMH
  or NiCd Batteries . 14
  Kevin Wrenner and Troy Seman Low Voltage Hot Swapв„ў Controller
  with Inrush Current Control . 17
  Chew Lye Huat DESIGN IDEAS
  . 20–36
  (complete list on page 20) New Device Cameos. 37 …

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Manufacturer's Classification

• Signal Conditioning > Amplifiers > Current Sense Amplifiers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Amplifiers