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Controladores LED
Controladores LED de iluminación

LM3642

ACTIVO

Controlador de flash LED de impulso síncrono de 1.5 A con corriente de lado alto

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LM3642

ACTIVO
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Detalles del producto

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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Documentación técnica

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* 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 ago 2017
EVM User's guide LM3642 Evaluation Board (Rev. A) 30 abr 2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM3642TL-LTEVM — Controlador de flash LED de impulso síncrono de 1.5 A con placa de evaluación de corriente de lado a

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 (...)
Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

LM3642TLEVM — Controlador de flash LED de impulso síncrono de 1.5 A con placa de evaluación de corriente de lado a

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 (...)
Guía del usuario: PDF
No disponible en TI.com
Controlador o biblioteca

LM3642SW-LINUX — Controlador Linux para 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 (...)

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Modelo de simulación

LM3642 Unencrypted PSpice Transient Model Package (Rev. B)

SNVM510B.ZIP (47 KB) - PSpice Model
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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YZR) 9 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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Soporte y capacitación

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