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Automotive eCall Power Supply Reference Design with High Intermediate Voltage
PMP9768
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Description

This reference design includes a complete power management solution for a standalone emergency call (eCall) system in an automotive environment. The circuit is supplied directly from the car battery rail. It also manages a backup battery to power the eCall system while the car battery rail is not available. It includes power path management which routes the available power rail directly to four DC/DC converters which are supplying the required functional blocks of the eCall system. The solution is optimized to operate at maximum efficiency while powered from the backup battery.

Features
  • Complete power solution for an automotive eCall system
  • Operating input voltage range up to 40V
  • Provides supply voltage for all required eCall functional blocks
  • Up to 87% total efficiency while operating at backup power
  • Up to 84% total efficiency in standby at backup power
  • All DC/DC converters used can operate at switching frequencies above 2MHz

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP9768.1
(Output Voltage 1)		PMP9768.2
(Output Voltage 2)		PMP9768.3
(Output Voltage 3)		PMP9768.4
(Output Voltage 4)
Vin (Min) (V)5555
Vin (Max) (V)40404040
Vout (Nom) (V)3.81.859
Iout (Max) (A)2111
Output Power (W)7.61.859
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDCDC
TopologyBuck- Integrated SwitchBuck- Integrated SwitchBuck- Integrated SwitchSepic- Integrated Switch

TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD25402Q3A  -20-V, P channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 8.9 mOhm  MOSFETs  Sample & Buy Not Available
TAS5421-Q1  Automotive, 22-W, 1-ch, 4.5- to 18-V analog input class-D audio amplifier w/ I2C diag, load dump  Audio amplifiers  Not Available View Design Kits & Evaluation Modules
TL331-Q1  Automotive Catalog Single Differential Comparator  Amplifiers  Sample & Buy Not Available
TLVH431A-Q1  Automotive, low-voltage adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
TPS61175-Q1  3-A, 40-V high voltage boost converter with soft-start and programmable switching frequency  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS62130A-Q1  TPS62130A-Q1 3 to 17-V 3-A Automotive Step-Down Converter in 3 × 3 QFN Package  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS62160-Q1  3V-17V 1A Automotive Step-Down Converters in 2x2SON  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD25402Q3A VSONP (DNH)| 8 Download
TAS5421-Q1 Download
TL331-Q1 Download Download
TLVH431A-Q1 Download Download
TPS61175-Q1 Download
TPS62130A-Q1 Download Download
TPS62160-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 273 22 Feb 2016
Design files (4)
Title Type Size (KB) Date
ZIP 162 22 Feb 2016
PDF 698 22 Feb 2016
PDF 94 22 Feb 2016
PDF 795 22 Feb 2016

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