Power Solution for an Automotive Fuel Injector

(ACTIVE) PMP7966

Description & Features

Technical Documents

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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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Bill of Materials (BOM)

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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)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CD4017B  CMOS Decade Counter with 10 Decoded Outputs  Specialty logic  Sample & Buy Not Available
LM5122  3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
LMC555  World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz  Clock & timing  Sample & Buy View Design Kits & Evaluation Modules
LP2951  30V, 100mA Micropower Voltage Regulators with Shutdown  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CD4017B Download Download
Download -
Download Download
Download Download
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LM5122 Download Download
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LMC555 Download Download
Download
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LP2951 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 910 14 Aug 2013 10
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 93 14 Aug 2013 7
PDF 266 14 Aug 2013 8

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