Energy Storage Circuit for Uninterrupted Power Supply and Extending Alkaline Battery Lifetime
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An alkaline battery and a boost converter are usually used to power the load system which requires high voltage, such as the motor driver in insulin pump. In this reference design, a lithium polymer battery is added to the output of the boost converter to absorb the pulse load current and extend the alkaline battery lifetime. The designed circuit also benefits uninterrupted power supply when the alkaline battery is out of charge.

  • Extend the alkaline battery lifetime
  • Uninterrupted power supply for important load
  • Support low output current capability boost converter
  • This circuit is tested on an evaluation board

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Design Files

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(Output Voltage 1)
Vin (Min) (V).7
Vin (Max) (V)3.2
Vout (Nom) (V)4
Iout (Max) (A).15
Output Power (W).6
Input TypeDC
TopologyBoost- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS61220  Low Input Voltage, 0.7V Boost Converter with 5.5μA Quiescent Current  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS61220 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 736 15 Dec 2014
Design files (5)
Title Type Size (KB) Date
ZIP 675 19 Dec 2014
ZIP 4929 19 Dec 2014
PDF 297 19 Dec 2014
PDF 80 19 Dec 2014
PDF 56 19 Dec 2014

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