Power Solution for an Automotive Fuel Injector


Design files


PMP7966 is a 4-phase boost converter rated for 52V output at 2.5A from an input voltage of 6V to 42V. This design uses LM5122 boost controllers at a switching frequency of 100 kHz each phase, resulting in 400 kHz input and output ripple. 680μF aluminum electrolytic capacitors are used at the output of each phase, providing hold-up to support large transient currents.

  • 52V power supply designed for automotive fuel injector solenoids
  • 4-phase boost with 100kHz switching frequency but easier-to-filter 400kHz ripples
  • 6V to 42V input voltage range, ideal for 12V/24V automotive batteries
  • Output capacitors sized to provide the hold-up during large load transients
Output voltage options PMP7966.1
Vin (Min) (V) 6
Vin (Max) (V) 42
Vout (Nom) (V) 52
Iout (Max) (A) 2.5
Output Power (W) 130
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Non Sync
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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.

SNVU306.PDF (976 K)

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

SNVR288.PDF (266 K)

Detailed schematic diagram for design layout and components

SNVR289.PDF (93 K)

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


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Test report PMP7966 Test Results Aug. 14, 2013

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