Power Solution for an Automotive Voltage Stabilizer

(ACTIVE) PMP7919

Description & Features

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View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


Description

The PMP7919 is a 2-phase synchronous boost converter that can take a minimum 5.5V input and put out 11.5V or higher at 15A. It is used in the Voltage Quality Module in a start-stop vehicle where warm cranking is not allowed to cause certain electronic loads (such as the head unit) to power cycle. When the start-stop vehicle goes through warm cranking, the lead acid battery voltage may dip to 6V (in the US) momentarily. The PMP7919 boost converter will, in this case, immediately respond to the transient so that its output voltage will stay in specifications, preventing downstream electronic loads from shutting down. When the battery voltage is higher than the boost converter's output regulation point (typically 11.5V), the synchronous boost converter will operate in bypass mode and leave the high-side FETs on 100%, saving extra bypass FETs and a control circuit that would be required if a non-synchronous boost converter were to be used.

Features
  • Mininum 5.5V input voltage supports US automotive cold cranking requirement
  • Regulated 11.5V output when (battery) input is below 11.5V
  • Operates in bypass mode when input voltage is higher than 11.5V
  • Maximum 1.17V output voltage dip during simulated cold cranking tests
  • High-side synchronous FETs can operate in 100% duty mode, saving extra bypass FETs.
  • Synchronous operation saves power and eases thermal design.

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (2)

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
CSD16415Q5  N-Channel NexFET Power MOSFET   Power MOSFET  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

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 1966 18 Dec 2013 32
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 3565 08 Jul 2014 1,305
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 113 18 Dec 2013 2
PDF 150 18 Dec 2013 14
Related Tools & Software

Software (1)




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