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LM3697

AKTIV

3-String-Hintergrundbeleuchtungstreiber mit 11 Bit exponentieller Dimmung

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Datenblatt

LM3697

AKTIV
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Produktdetails

Number of channels 3 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1100 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 91 Topology Boost Features I2C control, OVP, PWM control Operating temperature range (°C) -40 to 125 Rating Catalog
Number of channels 3 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1100 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 91 Topology Boost Features I2C control, OVP, PWM control Operating temperature range (°C) -40 to 125 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² (— mm × — mm)
  • Drives three parallel high-voltage led strings for display and keypad lighting
  • High-voltage strings capable of up to 40-V output voltage and up to 90% efficiency
  • Up to 30 mA per current sink
  • 11-Bit configurable dimming resolution
  • PWM input for content adjustable brightness control (CABC)
  • Fully configurable LED grouping and control
  • Integrated 1-A/40-V MOSFET
  • Adaptive boost output to LED voltages
  • Selectable 500-kHz and 1-MHz switching frequency
  • Four configurable overvoltage protection thresholds (16 V, 24 V, 32 V, and 40 V)
  • Overcurrent protection
  • Thermal shutdown protection
  • 29-mm2 Total solution size
  • Drives three parallel high-voltage led strings for display and keypad lighting
  • High-voltage strings capable of up to 40-V output voltage and up to 90% efficiency
  • Up to 30 mA per current sink
  • 11-Bit configurable dimming resolution
  • PWM input for content adjustable brightness control (CABC)
  • Fully configurable LED grouping and control
  • Integrated 1-A/40-V MOSFET
  • Adaptive boost output to LED voltages
  • Selectable 500-kHz and 1-MHz switching frequency
  • Four configurable overvoltage protection thresholds (16 V, 24 V, 32 V, and 40 V)
  • Overcurrent protection
  • Thermal shutdown protection
  • 29-mm2 Total solution size

The LM3697 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2, and HVLED3).

An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3697 is fully configurable via an I2C-compatible interface. The device operates over a
2.7-V to 5.5-V input voltage range and a −40°C to +85°C temperature range.

The LM3697 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2, and HVLED3).

An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3697 is fully configurable via an I2C-compatible interface. The device operates over a
2.7-V to 5.5-V input voltage range and a −40°C to +85°C temperature range.

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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LM3697 High-efficiency three-string white LED driver datasheet (Rev. D) PDF | HTML 27.03.2019
Anwendungshinweis How to use the LM3697 Device to Design a Backlight Unit in a Smartphone PDF | HTML 15.04.2021
Whitepaper Common LED Functions and LED Driver Design Considerations 21.09.2020
Anwendungshinweis Analog PWM Dimming in White-LED Drivers 21.12.2016

Design und Entwicklung

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

Evaluierungsplatine

LM3697EVM — Evaluierungsmodul für LM3697 Drei-String-Weiß-LED-Treiber für Smartphone-Handsets

The LM3697 Evaluation Module (LM3697EVM) is designed to fully evaluate the LM3697 Three String backlight driver.  The LM3697EVM consists of the LM3697, 3p10s white LED strings, level shifters and the USB2ANY interface.  The Texas Instruments USB2ANY interface provides the hardware link (...)

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LM3532SW-LINUX — Linux-Treiber für LM3532

The Linux driver supports the LMU(Lighting Management Unit) devices for smartphone handsets. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.

 

Linux Mainline Status

Available in Linux Main line: No
Available through git.ti.com: (...)

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GUI für Evaluierungsmodul (EVM)

SNVC095 — LM3697 GUI Software

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Simulationsmodell

LM3697 Unencrypted PSpice Transient Model Package (Rev. B)

SNOM463B.ZIP (51 KB) - PSpice-Modell
Unterstützte Produkte und Hardware
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
DSBGA (YFQ) 12 Ultra Librarian
Es gelten die allgemeinen Geschäftsbedingungen von TI für Evaluierungsartikel.

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