Automotive eCall Power Supply Reference Design with High Intermediate Voltage

(ACTIVE) PMP9768

Description & Features

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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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Test Data

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Design Files

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Bill of Materials (BOM)

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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  P-Channel NexFET Power MOSFET  MOSFETs  Sample & Buy Not Available
TAS5421-Q1  22-W Mono Automotive Digital Audio Amplifier With Load Dump and I2C Diagnostics  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TL331-Q1  Automotive Catalog Single Differential Comparator  Amplifiers  Sample & Buy Not Available
TLVH431A-Q1  Automotive Catalog Low-Voltage Adjustable Precision Shunt Regulator  Voltage references  Not Available Not Available
TPS61175-Q1  3-A High-Voltage Automotive Boost Converter with Programmable Switching Frequency  Step-up (boost)  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)  Sample & Buy View Design Kits & Evaluation Modules
TPS62160-Q1  3V-17V 1A Automotive Step-Down Converters in 2x2SON  Step-down (buck)  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
TPS62130A-Q1 Download Download
TPS62160-Q1 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 273 22 Feb 2016 80
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 162 22 Feb 2016 42
PDF 698 22 Feb 2016 5
PDF 94 22 Feb 2016 10
PDF 795 22 Feb 2016 155

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