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Controladores LED
Controladores LED de iluminación

LM2759

ACTIVO

Controlador LED flash de capacitor conmutado de 1 A con interfaz compatible con I2C

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LM2759

ACTIVO
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Detalles del producto

Input voltage type DC/DC Topology Charge pump, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 3 Iout (max) (A) 1 Iq (typ) (mA) 3.4 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Charge pump, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 3 Iout (max) (A) 1 Iq (typ) (mA) 3.4 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
WSON (DQB) 12 9 mm² 3 x 3
  • Up to 1A Output Current
  • Solution Area < 22 mm2
  • No Inductor Required
  • 90% Peak Efficiency
  • Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
  • Load Disconnect in Shutdown
  • Accurate Input Current Control During Gain Transitions
  • Flash Time-Out
  • TX Input Pin Ensures Synchronization with RF Power Amplifier Pulse
  • Torch, Flash, and Indicator Modes
  • External Flash Enable via Strobe Input Pin
  • Strobe Input Disable via I2C
  • Programmable Flash Pulse Duration, and Torch and Flash Currents via I2C-Compatible Interface
  • 1MHz Constant Frequency Operation
  • Low Profile 12–Pin WSON (3mm x 3mm x 0.8mm)

All trademarks are the property of their respective owners.

  • Up to 1A Output Current
  • Solution Area < 22 mm2
  • No Inductor Required
  • 90% Peak Efficiency
  • Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
  • Load Disconnect in Shutdown
  • Accurate Input Current Control During Gain Transitions
  • Flash Time-Out
  • TX Input Pin Ensures Synchronization with RF Power Amplifier Pulse
  • Torch, Flash, and Indicator Modes
  • External Flash Enable via Strobe Input Pin
  • Strobe Input Disable via I2C
  • Programmable Flash Pulse Duration, and Torch and Flash Currents via I2C-Compatible Interface
  • 1MHz Constant Frequency Operation
  • Low Profile 12–Pin WSON (3mm x 3mm x 0.8mm)

All trademarks are the property of their respective owners.

LM2759 is an integrated low-noise, high-current switched capacitor DC/DC converter with a regulated current source. The device requires only four small ceramic capacitors making the total solution area less than 22 mm2 and the height less than 1 mm. The LM2759 is capable of driving loads up to 1A from a single-cell Li-Ion battery. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

The LED current can be programmed up to 1A via an I2C-compatible interface, along with eight selectable Flash Time-Out durations. One high-current Flash LED can be driven either in a high-power Flash mode or a low-power Torch mode. The Strobe pin allows the flash to be toggled via a Flash enable signal from a camera module. The TX input pin limits the Flash LED current to the Torch current level during a RF PA pulse, to reduce high loads on the battery. Internal soft-start circuitry limits the amount of inrush current during start-up.

LM2759 is offered in a small 12-pin thermally enhanced WSON package.

LM2759 is an integrated low-noise, high-current switched capacitor DC/DC converter with a regulated current source. The device requires only four small ceramic capacitors making the total solution area less than 22 mm2 and the height less than 1 mm. The LM2759 is capable of driving loads up to 1A from a single-cell Li-Ion battery. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

The LED current can be programmed up to 1A via an I2C-compatible interface, along with eight selectable Flash Time-Out durations. One high-current Flash LED can be driven either in a high-power Flash mode or a low-power Torch mode. The Strobe pin allows the flash to be toggled via a Flash enable signal from a camera module. The TX input pin limits the Flash LED current to the Torch current level during a RF PA pulse, to reduce high loads on the battery. Internal soft-start circuitry limits the amount of inrush current during start-up.

LM2759 is offered in a small 12-pin thermally enhanced WSON package.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM2759 1A Switched Capacitor Flash LED Driver with I 2 C Compatible Interface datasheet (Rev. D) 03 may 2013
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020

Diseño y desarrollo

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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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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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