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LM3642

AKTIV

Synchroner Boost-LED-Blitztreiber, 1,5 A, mit Highside-Strom

Produktdetails

Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.5 Iq (typ) (mA) 0.75 Features Input/Output Isolation, OVP, Over Current Protection, Synchronous Rectification Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.5 Iq (typ) (mA) 0.75 Features Input/Output Isolation, OVP, Over Current Protection, Synchronous Rectification Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
DSBGA (YZR) 9 3.0625 mm² 1.75 x 1.75
  • 1.5-A High-Side Current Source for Single LED
  • > 85% Efficiency in Torch Mode (at 100 mA) and
    Flash Mode (at 1 A to 1.5 A)
  • Accurate Programmable Flash LED Current from
    93 mA to 1.5 A
  • Accurate Programmable Torch LED Currents:
    • 48.4 mA to 375 mA
    • 24 mA to 187 mA (LT option)
  • Small Solution Size: < 20 mm2
  • Soft-Start Operation for Battery Protection
  • Hardware Strobe Enable
  • Synchronization Input for RF Power Amplifier
    Pulse Events
  • VIN Flash Monitor Optimization
  • 400-kHz I2C-Compatible Interface
  • 0.5-mm Pitch, 9-Bump DSBGA
  • 1.5-A High-Side Current Source for Single LED
  • > 85% Efficiency in Torch Mode (at 100 mA) and
    Flash Mode (at 1 A to 1.5 A)
  • Accurate Programmable Flash LED Current from
    93 mA to 1.5 A
  • Accurate Programmable Torch LED Currents:
    • 48.4 mA to 375 mA
    • 24 mA to 187 mA (LT option)
  • Small Solution Size: < 20 mm2
  • Soft-Start Operation for Battery Protection
  • Hardware Strobe Enable
  • Synchronization Input for RF Power Amplifier
    Pulse Events
  • VIN Flash Monitor Optimization
  • 400-kHz I2C-Compatible Interface
  • 0.5-mm Pitch, 9-Bump DSBGA

The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.

The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.

The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.

The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.

The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.

The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM3642 1.5-A Synchronous Boost LED Flash Driver With High-Side Current Source datasheet (Rev. H) PDF | HTML 04 Sep 2015
Application note No Boost Inductor Design with LM364x for Long-Time Focusing in Camera Module PDF | HTML 16 Feb 2022
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note LED Flash-Protection Features 23 Aug 2017
EVM User's guide LM3642 Evaluation Board (Rev. A) 30 Apr 2013

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM3642TL-LTEVM — LM3642 1,5A synchroner Aufwärts-LED-Flash-Treiber mit High-Side-Strom-Evaluierungsmodul-Platine

1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board

The LM3642TL-LT is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)
Benutzerhandbuch: PDF
Evaluierungsplatine

LM3642TLEVM — LM3642 1,5A synchroner Aufwärts-LED-Flash-Treiber mit High-Side-Strom-Evaluierungsmodul-Platine

1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board

The LM3642TL is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)
Benutzerhandbuch: PDF
Treiber oder Bibliothek

LM3642SW-LINUX — Linux-Treiber für LM3642

The Linux driver supports the LM3642 LED Flash Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lm3642

 

Linux Source Files

The files (...)

Simulationsmodell

LM3642 Unencrypted PSpice Transient Model Package (Rev. B)

SNVM510B.ZIP (47 KB) - PSpice Model
Simulationstool

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
DSBGA (YZR) 9 Ultra Librarian

Bestellen & Qualität

Beinhaltete Information:
  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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