Power Solution for an Engineering Equipment Fuel Injector
PMP7967
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Description

The PMP7967 converts a DC input of 6V-42V to an output of 90V at 1.5A.  The design uses four interleaved LM5122 boost controllers with each controller switching at 100kHz. The resulting 4-phase boost converter has a ripple frequency of 400kHz. Freqeucny can also be synchronized to an external signal. Four 330μF aluminum electrolytic capacitors are used at the output to support sudden load current demands in the fuel injector solenoids.

Features
  • 4-phase boost converter with 90V/1.5A output
  • 100kHz switching frequency with 400kHz effective input and output ripples
  • 6V to 42V input voltage range, good for 12V or 24V lead acid batteries
  • 1.32mF total output capacitance to support sudden load demands

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP7967.1
(Output Voltage 1)
Vin (Min) (V)6
Vin (Max) (V)42
Vout (Nom) (V)90
Iout (Max) (A)1.5
Output Power (W)135
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

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 875 14 Aug 2013
Design files (3)
Title Type Size (KB) Date
ZIP 1073 17 Dec 2013
PDF 95 14 Aug 2013
PDF 210 14 Aug 2013

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