Power Solution for an Automotive Fuel Injector
PMP7966
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Description

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.

Features
  • 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

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Schematic/Block Diagram

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Test Data

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Parametrics
 PMP7966.1
(Output Voltage 1)
Vin (Min) (V)6
Vin (Max) (V)42
Vout (Nom) (V)52
Iout (Max) (A)2.5
Output Power (W)130
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBoost- Non Sync

TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CD4017B  CMOS Decade Counter with 10 Decoded Outputs  Specialty logic ICs  Sample & Buy View Design Kits & Evaluation Modules
LM5122  3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
LMC555  World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz  Clocks & timing  Sample & Buy View Design Kits & Evaluation Modules
LP2951  100-mA, 30-V, low-dropout voltage regulator with power good & enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CD4017B Download Download
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LM5122 Download Download
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LMC555 Download Download
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LP2951 Download Download
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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 910 14 Aug 2013
Design files (2)
Title Type Size (KB) Date
PDF 93 14 Aug 2013
PDF 266 14 Aug 2013

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