PMP9769 Reference Design

Texas Instruments

Automotive eCall Power Supply Reference Design with Low Intermediate Voltage


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.

  •  Complete power solution for an automotive eCall systemOperating input voltage range up to 40VProvides supply voltage for all required eCall functional blocksUp to 87% total efficiency while operating at backup powerUp to 90% total efficiency in standby at backup powerAll DC/DC converters used can operate at switching frequencies above 2MHz 
  • Off-highway vehicles control systems
  • Telematics control unit
  • Emergency call (eCall)
  • Off-highway vehicles sensor systems
  • Cellular module asset tracking
  • Off-highway vehicles electric drive systems
  • Off-highway vehicles HMI & display systems
  • Aftermarket telematics
  • Smart telematics gateway
  • E-bike HMI
Product Categories
  • Power management


Part Number Name Companion Part
CSD16412Q5A CSD16412Q5A Buy Datasheet
TL331-Q1 TL331-Q1 Buy Datasheet
TPS62290-Q1 TPS62290-Q1 Buy Datasheet

Bill Of Materials

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Test Data

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Other Documents

Title Updated Type Size (KB)
PMP9769 Gerber 13 Jan 2016 ZIP 275
PMP9769 PCB 13 Jan 2016 PDF 1151
PMP9769 BOM 13 Jan 2016 PDF 89
PMP9769 Schematic 13 Jan 2016 PDF 88