Smart OR-ing boost converter reference design for automotive eCall


Design files


This reference design is a smart OR-ing boost converter for automotive emergency call (eCall) applications utilizing a low quiescent current boost controller. The design uses two boost power stages driven by the same controller. The main battery input includes a bypass switch function. The backup battery input has a separate enable with disconnect switches. This combination allows for seamless crossover from the main battery to the backup battery.

  • Dual boost power stages allows for single controller operation
  • 440 kHz switching frequency, which is below the AM band
  • Low input voltage for operation during cold crank
  • Bypass switch for main battery reduces losses
  • Automatic crossover to battery backup for glitch-free performance
Output voltage options PMP21152.1
Vin (Min) (V) 3
Vin (Max) (V) 30
Vout (Nom) (V) 10.5
Iout (Max) (A) 1.5
Output Power (W) 15.75
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Non Sync
?? View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT085.PDF (2119 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM5150-Q1Automotive 1.5-V to 42-V VIN, low IQ boost controller with 6.8V, 7.5V, 8.5V, 10.5V output options

Data sheet: PDF | HTML

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Test report Smart OR-ing boost converter reference design for automotive eCall Jan. 30, 2019

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​