Supercapacitor backup power supply with current limit and active cell balancing reference design
PMP30693
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Description & Features

Technical documentation

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Key Document

Description

This reference design automatically provides a back-up voltage during a power interruption. It manages the charging of supercapitors and provides reverse blocking protection. The maximum supercapacitor charging current and voltage can be adjusted. When the input voltage fails a buck-boost converter (TPS63802) takes over and generates a constant backup voltage. The supercapacitor capacitance and voltage define the energy that is available for the backup. The PMP30693 provides a stable backup output of 3.7 V at 300 mA for more than 100 s until the output voltage drops.

Features
  • Seamless transition between mains power and back-up operation
  • Active cell balancing
  • Adjustable input current limit
  • Complete tested design with available design files and test report

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP30693.1
(Output Voltage 1)
Vin (Min) (V)3.3
Vin (Max) (V)5.3
Vout (Nom) (V)3.7
Iout (Max) (A)1
Output Power (W)3.7
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck Boost- 4 Switch

TI Devices (6)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA181  26V, bi-directional, 350kHz current sense amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM66100  ±6-V, Low IQ ideal diode with input polarity protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TLV431A  1% accuracy, low-voltage, adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TLV521  350-nA Nanopower, Single, RRIO, CMOS Input, Operational Amplifier for Cost-Sensitive Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV522  500-nA Nanopower, Dual, RRIO, CMOS-Input Operational Amplifier for Cost-Sensitive Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS63802  2-A, high-efficient, 11-µA quiescent current buck-boost converter in QFN/DFN package  Buck-boost & inverting regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA181 Download Download
Download
LM66100 Download
TLV431A Download Download
Download Download
Download -
Download Download
Download -
Download Download
TLV521 Download
TLV522 Download
TPS63802 Download -

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Technical documentation

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Application notes (1)
Title Type Size (KB) Date
PDF 1063 31 Oct 2019
User guides (1)
Title Type Size (KB) Date
PDF 3081 25 Oct 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1024 25 Oct 2019
ZIP 560 25 Oct 2019
PDF 376 25 Oct 2019
PDF 298 25 Oct 2019
PDF 28 25 Oct 2019
PDF 198 25 Oct 2019

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