Back-up battery power reference design for automotive emergency calling applications
TIDA-050031
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Key Document

Description

This back-up power reference design is for automotive E-Call application. It uses one cell LiFePO4 as the backup battery. The minimum backup battery voltage can be down to 2 V with boost converter TPS61088-Q1; the maximum output power can be 8 V/1.7A. This reference design is low-cost, high efficiency with a small size. The value this has over the integrated solution competition is much better efficiency and less redundancy when boosting from the back-up battery.

Features
  • Wide input voltage range: 3.8 – 36 V
  • 100mA linear charger
  • 8 V/1.6A output power capability when backup battery voltage drop to 2 V
  • High efficiency
  • Low cost

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Schematic/Block Diagram

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Design Files

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Parametrics
 TIDA-050031.1
(Output Voltage 1)
Vin (Min) (V)2
Vin (Max) (V)3.4
Vout (Nom) (V)9
Iout (Max) (A)1.5
Output Power (W)13.5
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBoost- CCM

TI Devices (4)

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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
LMR33630-Q1  3.8-V to 36-V, 3-A synchronous step-down voltage converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS61088-Q1  Automotive 10-A 2.7-V to 12-V Synchronous Boost Converter  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS7A25  300-mA, 18-V, ultra-low-IQ, high-accuracy, adjustable low-dropout voltage regulator with power good  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ATL431 Download Download
LMR33630-Q1 Download Download
TPS61088-Q1 Download Download
TPS7A25 Download Download

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Technical documentation

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Datasheet (1)
Title Type Size (KB) Date
PDF 1721 29 Nov 2018
User guides (1)
Title Type Size (KB) Date
PDF 1236 27 Nov 2019
Design files (6)
Title Type Size (KB) Date
ZIP 613 26 Nov 2019
ZIP 761 26 Nov 2019
PDF 517 26 Nov 2019
PDF 120 26 Nov 2019
PDF 102 26 Nov 2019
PDF 185 26 Nov 2019

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