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背光 LED 驅動器

LM3697

現行

具有 11 位元指數調光功能的 3 燈串背光驅動器

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產品規格表

LM3697

現行
產品規格表 立即訂購

產品詳細資料

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 1.8 x 1.4000000000000001
  • 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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技術文件

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類型 標題 日期
* Data sheet LM3697 High-efficiency three-string white LED driver datasheet (Rev. D) PDF | HTML 2019年 3月 27日
Application note How to use the LM3697 Device to Design a Backlight Unit in a Smartphone PDF | HTML 2021年 4月 15日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Application note Analog PWM Dimming in White-LED Drivers 2016年 12月 21日
EVM User's guide LM3697EVM User Guide 2013年 11月 15日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM3697EVM — 適用於智慧型手機之 LM3697 三燈串白色 LED 驅動器的評估模組

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 (...)

使用指南: PDF
TI.com 無法提供
驅動程式或資料庫

LM3532SW-LINUX — 適用於 LM3532 的 Linux 驅動程式

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: (...)

檢視選項
開發模組 (EVM) 的 GUI

SNVC095 — LM3697 GUI Software

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支援產品和硬體

產品
背光 LED 驅動器
LM3697 — 具有 11 位元指數調光功能的 3 燈串背光驅動器
硬體開發
開發板
LM3697EVM — 適用於智慧型手機之 LM3697 三燈串白色 LED 驅動器的評估模組
下載
模擬型號

LM3697 Unencrypted PSpice Transient Model Package (Rev. B)

SNOM463B.ZIP (51 KB) - PSpice Model
下載
模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

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 (...)
要求
封裝 引腳 下載
DSBGA (YFQ) 12 檢視選項
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