6 Channel LED Backlight Driver with Power Supply

MC34845 No Longer Manufactured
  • This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.

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The NXP® MC34845 is a high efficiency, LED driver for use in backlighting LCD displays from 10” to 17”+.

  • Capable of driving up to 16 LEDs in series in each of 6 strings
  • PWM dimming is performed by applying a PWM input signal to the PWM pin which modulates the LED channels directly
  • The integrated boost converter uses dynamic headroom control to automatically set the output voltage
  • Three device versions for boost frequency: the 34845 and 34845C are 600 kHz, the 34845 A is 1.2 MHz and the 34845B and 34845D are 300 kHz
  • Includes fault protection modes for LED short and open, over temperature, over current and over voltage errors. The OVP level can be set by using an external resistor divider.

Product Details

Block Diagram

Freescale MC34845 LED Driver Block Diagram

NXP<sup>&#174;</sup> MC34845 LED Driver Block Diagram
Get diagram PDF

Features

Key Features

  • Input voltage of 5 to 21 V
  • Boost output voltage up to 60 V
  • Output current 2.1, 2.35 A
  • 2.0 A integrated boost FET
  • Fixed boost frequency to 300 kHz, 600 kHz or 1.2 MHz
  • OTP, OCP, UVLO fault detection, LED short/open protection
  • Programmable LED current between 3.0 mA and 30 mA
  • 24-Ld 4x4x0.65 mm WQFN Package
  • Parallel interface and input control

Product Longevity Program

N true 0 PSPMC34845en 5 Application Note Application Note t789 2 Data Sheet Data Sheet t520 1 Product Change Notice Product Change Notice t526 1 User Guide User Guide t792 1 en_US 1 1 8.0 English The 34845 series represents high efficiency LED drivers for use in backlighting LCD displays from 10&#8221; to 17&#8221;. 1245876811348730898793 PSP 697.5 KB None None documents None 1245876811348730898793 /docs/en/data-sheet/MC34845.pdf 697538 /docs/en/data-sheet/MC34845.pdf MC34845 N N 2009-06-24 MC34845, Low Cost Six Channel LED Backlight Driver with Integrated Power Supply - Data Sheet /docs/en/data-sheet/MC34845.pdf /docs/en/data-sheet/MC34845.pdf Data Sheet N Y 980000996212993340 2022-12-07 pdf N en May 29, 2015 Data Sheet t520 Data Sheet Data Sheet Y N MC34845, Low Cost Six Channel LED Backlight Driver with Integrated Power Supply - Data Sheet false en_US en Application Note Application Note 2 2 1.0 English This document presents the main concepts behind the wheel location algorithm of the KWL software. The document details the approach used and explains how this led to the current implementation. 1485456925034706793334 PSP 6.7 MB Registration without Disclaimer None documents Extended 1485456925034706793334 /secured/assets/documents/en/application-note/AN5322.pdf 6749797 /secured/assets/documents/en/application-note/AN5322.pdf AN5322 documents Y N 2017-01-26 AN5322: TPMS Wheel Location Introduction and Main Concepts Application Note /webapp/Download?colCode=AN5322 /secured/assets/documents/en/application-note/AN5322.pdf Application Note N 645036621402383989 2024-01-19 pdf Y en Jan 25, 2017 645036621402383989 Application Note Y N AN5322: TPMS Wheel Location Introduction and Main Concepts Application Note 3 1.0 English Using the MC34845 to drive more than 16 LEDs on each of the channels. 1260375099977721893624 PSP 567.0 KB None None documents None 1260375099977721893624 /docs/en/application-note/AN3957.pdf 566984 /docs/en/application-note/AN3957.pdf AN3957 documents N 2009-12-09 AN3957, Using the MC34845 for Larger LCD Displays /docs/en/application-note/AN3957.pdf /docs/en/application-note/AN3957.pdf Application Note N 645036621402383989 2022-12-07 pdf en Dec 9, 2009 645036621402383989 Application Note Y N AN3957, Using the MC34845 for Larger LCD Displays User Guide User Guide 1 4 1.0 English This EVB shows the functionality of MC34845 set up under specific operation parameters. 1246311743692700995799 PSP 3.1 MB None None documents None 1246311743692700995799 /docs/en/user-guide/KT34845UG.pdf 3099297 /docs/en/user-guide/KT34845UG.pdf KT34845UG documents N 2009-06-29 KIT34845EPEVME, Evaluation Board- User Guide /docs/en/user-guide/KT34845UG.pdf /docs/en/user-guide/KT34845UG.pdf User Guide N 132339537837198660 2023-06-19 pdf en Jun 29, 2009 132339537837198660 User Guide Y N KIT34845EPEVME, Evaluation Board- User Guide Product Change Notice Product Change Notice 1 5 0 English 1405107633420702476736 PSP 47.3 KB None None documents None 1405107633420702476736 /docs/en/product-change-notice/PCN16331.htm 47341 /docs/en/product-change-notice/PCN16331.htm PCN16331 documents N 2014-07-11 Copper Wire and Case Outline Qualification (QFN) /docs/en/product-change-notice/PCN16331.htm /docs/en/product-change-notice/PCN16331.htm Product Change Notice N 454076741825495278 2022-12-07 htm en Jul 11, 2014 454076741825495278 Product Change Notice D N Copper Wire and Case Outline Qualification (QFN) false 0 MC34845 downloads en true 1 Y PSP Application Note 2 /secured/assets/documents/en/application-note/AN5322.pdf 2017-01-26 1485456925034706793334 PSP 2 Jan 25, 2017 Application Note This document presents the main concepts behind the wheel location algorithm of the KWL software. The document details the approach used and explains how this led to the current implementation. Registration without Disclaimer /secured/assets/documents/en/application-note/AN5322.pdf English documents 6749797 None 645036621402383989 2024-01-19 Y /webapp/Download?colCode=AN5322 AN5322: TPMS Wheel Location Introduction and Main Concepts Application Note /secured/assets/documents/en/application-note/AN5322.pdf documents 645036621402383989 Application Note N en Extended Y pdf 1.0 Y N AN5322: TPMS Wheel Location Introduction and Main Concepts Application Note 6.7 MB AN5322 N 1485456925034706793334 /docs/en/application-note/AN3957.pdf 2009-12-09 1260375099977721893624 PSP 3 Dec 9, 2009 Application Note Using the MC34845 to drive more than 16 LEDs on each of the channels. None /docs/en/application-note/AN3957.pdf English documents 566984 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3957.pdf AN3957, Using the MC34845 for Larger LCD Displays /docs/en/application-note/AN3957.pdf documents 645036621402383989 Application Note N en None Y pdf 1.0 N AN3957, Using the MC34845 for Larger LCD Displays 567.0 KB AN3957 N 1260375099977721893624 Data Sheet 1 /docs/en/data-sheet/MC34845.pdf 2009-06-24 1245876811348730898793 PSP 1 May 29, 2015 Data Sheet Data Sheet The 34845 series represents high efficiency LED drivers for use in backlighting LCD displays from 10&#8221; to 17&#8221;. None /docs/en/data-sheet/MC34845.pdf English 697538 None Data Sheet 2022-12-07 N /docs/en/data-sheet/MC34845.pdf MC34845, Low Cost Six Channel LED Backlight Driver with Integrated Power Supply - Data Sheet /docs/en/data-sheet/MC34845.pdf documents 980000996212993340 Data Sheet N Y en None Y t520 pdf 8.0 N N MC34845, Low Cost Six Channel LED Backlight Driver with Integrated Power Supply - Data Sheet 697.5 KB MC34845 N 1245876811348730898793 Product Change Notice 1 /docs/en/product-change-notice/PCN16331.htm 2014-07-11 1405107633420702476736 PSP 5 Jul 11, 2014 Product Change Notice None /docs/en/product-change-notice/PCN16331.htm English documents 47341 None 454076741825495278 2022-12-07 /docs/en/product-change-notice/PCN16331.htm Copper Wire and Case Outline Qualification (QFN) /docs/en/product-change-notice/PCN16331.htm documents 454076741825495278 Product Change Notice N en None D htm 0 N Copper Wire and Case Outline Qualification (QFN) 47.3 KB PCN16331 N 1405107633420702476736 User Guide 1 /docs/en/user-guide/KT34845UG.pdf 2009-06-29 1246311743692700995799 PSP 4 Jun 29, 2009 User Guide This EVB shows the functionality of MC34845 set up under specific operation parameters. None /docs/en/user-guide/KT34845UG.pdf English documents 3099297 None 132339537837198660 2023-06-19 /docs/en/user-guide/KT34845UG.pdf KIT34845EPEVME, Evaluation Board- User Guide /docs/en/user-guide/KT34845UG.pdf documents 132339537837198660 User Guide N en None Y pdf 1.0 N KIT34845EPEVME, Evaluation Board- User Guide 3.1 MB KT34845UG N 1246311743692700995799 true Y Products

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