Energy Harvesting from Current Transformer with Super Capacitor for Fault Indicator Reference Design
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Key Document


Power management for the energy harvesting, energy buffering and back-up power is a key challenge in the fault indicator design. The TIDA-01385 introduces a circuit about harvesting energy from a current transformer for the system load of a fault indicator while storing the extra energy in a super capacitor. A primary Li/SOCl2 battery is used as back-up power to extend the fault indicator operating time after the power grid fails. With input current from 3mA to 2A, the reference design provides a stable 3.6V to system load within two seconds.

  • Harvest energy from current transformer
  • Automatic charging super capacitor with extra energy
  • Providing stable output voltage within two seconds
  • Super capacitor full charged protection
  • Ultra-low input boost converter for utilizing maximum supercapacitor stored energy

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Design Files

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(Output Voltage 1)
Vin (Min) (V).9
Vin (Max) (V)3.6
Vout (Nom) (V)3.6
Iout (Max) (A).05
Output Power (W).18
Input TypeAC
TopologyBoost- Synchronous

TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ATL431  2.5-V low-IQ adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
CSD13202Q2  12-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 9.3 mOhm  MOSFETs  Sample & Buy Not Available
CSD25310Q2  -20-V, P channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 23.9 mOhm  MOSFETs  Sample & Buy Not Available
TLV3492  Dual Nanopower Push-Pull Output Comparator  Amplifiers  Sample & Buy Not Available
TPS61021A  3-A Boost Converter with 0.5-V Ultra Low Input Voltage  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ATL431 Download Download
CSD13202Q2 WSON (DQK)| 6 Download
CSD25310Q2 WSON (DQK)| 6 Download
TLV3492 Download Download
Download -
TPS61021A Download

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Technical documentation

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Application note (1)
Title Type Size (KB) Date
PDF 119 27 Nov 2018
User guide (1)
Title Type Size (KB) Date
PDF 671 05 Jun 2017
Design files (6)
Title Type Size (KB) Date
ZIP 121 05 Jun 2017
ZIP 1037 05 Jun 2017
PDF 358 05 Jun 2017
PDF 92 05 Jun 2017
PDF 29 05 Jun 2017
PDF 112 05 Jun 2017
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Energy Harvesting and Fault Indicator Subsystem for Overhead Fault Indicators Reference Design  TIDA-00998  Reference design 

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