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Introducing the LTC4071

Introducing the LTC4071. Shunt Battery Charger System with Low Battery Disconnect. Emerging Markets. Power management for nontraditional energy sources. Thin film battery. SuperCaps. Organic Solar Cell. Piezo-Electric Elements. Thermo-Electric Generator. Micro Fuel Cell.

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Introducing the LTC4071

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  1. Introducing the LTC4071 Shunt Battery Charger System with Low Battery Disconnect

  2. Emerging Markets Power management for nontraditional energy sources Thin film battery SuperCaps Organic Solar Cell Piezo-Electric Elements Thermo-Electric Generator Micro Fuel Cell

  3. LTC4071: What is It? Shunt Battery Charger + Integrated Pack Protection Shunt Battery Charger System With Low Battery Disconnect • Low Operating Current: 550nA • 1% Float Voltage Accuracy Over Full Temperature and Shunt Current Range • 50mA Maximum Internal Shunt Current • Pin Selectable Float Voltage Options: 4.0V, 4.1V. 4.2V

  4. LTC4071: Key Technical Features • Integrated Pack Protection in One IC • Overvoltage (zener) and Undervoltage (Low Battery Disconnect) • Low Operating Current: 550nA • Pin Selectable Low Battery Disconnect Level: 2.7V or 3.2V • 1% Float Voltage Accuracy Over Full Temperature and Shunt Current Range • 50mA Maximum Internal Shunt Current • Pin Selectable Float Voltage Options: 4.0V, 4.1V. 4.2V • Ultralow Power NTC Float Voltage Conditioning for Li-Ion/Polymer Protection • Suitable for Very Low Power (Intermittent or Continuous) Charging Sources • High Battery Status Output • Thermally Enhanced, Low Profile 8-Lead DFN (2mm x 3mm x 0.75mm) and MSOP Packages

  5. LTC4071: Features and Benefits

  6. LTC4071: Features and Benefits - NTC (cont.)

  7. LTC4071: Features and Benefits – NanoPower (cont.) When the input supply is removed and the battery voltage is below the high battery output threshold, the LTC4071 consumes just 550nA from the battery. This enables the device to draw or harvest power from previously unusable low current, intermittent or continuous power sources.

  8. LTC4071: Packaging * not to scale

  9. LTC4071: Typical Application Circuits Simple Single Cell Li Charger

  10. LTC4071: Typical Application Circuits (cont.) Photovoltaic (Solar) Charger 2-Cell Stacked Battery Charger

  11. LTC4071: Positioning

  12. LTC4071: Competition

  13. LTC4071: End Markets/Applications • Low Power Li-Ion/Polymer Battery Back-Up • Energy Scavenging/Harvesting • Solar Power Systems with Back-Up • Memory Back-Up • Embedded Automotive • Thin Film Batteries

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