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LM3533

現行

適於智慧型手機的完整照明解決方案

產品詳細資料

Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features OVP Operating temperature range (°C) -40 to 125 Rating Catalog
Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features OVP Operating temperature range (°C) -40 to 125 Rating Catalog
DSBGA (YFQ) 20 3.96 mm² 2.2 x 1.8
  • Drives Two 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 (Both Backlight and
    Indicator)
  • 14-Bit Equivalent Exponential Dimming With 8-Bit
    Programmable Backlight Code
  • Selectable Analog ALS Input with 128
    Programmable Gain-Setting Resistors or PWM
    ALS Input With Internal Low-Pass Filter
  • PWM Input for Content Adjustable Brightness
    Control
  • Five Low-Voltage Current Sinks for Indicator LEDs
  • Integrated Charge Pump for Improved Efficiency
    and VIN Operating Range
  • Internal Pattern Generation Engine
  • Fully Configurable LED Grouping and Control
  • Four Programmable Overvoltage Protection
    Thresholds (16 V, 24 V, 32 V, and 40 V)
  • Programmable 500-kHz and 1-MHz Switching
    Frequency
  • 27-mm2 Total Solution Size
  • Drives Two 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 (Both Backlight and
    Indicator)
  • 14-Bit Equivalent Exponential Dimming With 8-Bit
    Programmable Backlight Code
  • Selectable Analog ALS Input with 128
    Programmable Gain-Setting Resistors or PWM
    ALS Input With Internal Low-Pass Filter
  • PWM Input for Content Adjustable Brightness
    Control
  • Five Low-Voltage Current Sinks for Indicator LEDs
  • Integrated Charge Pump for Improved Efficiency
    and VIN Operating Range
  • Internal Pattern Generation Engine
  • Fully Configurable LED Grouping and Control
  • Four Programmable Overvoltage Protection
    Thresholds (16 V, 24 V, 32 V, and 40 V)
  • Programmable 500-kHz and 1-MHz Switching
    Frequency
  • 27-mm2 Total Solution Size

The LM3533 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. The high-voltage inductive boost converter provides the power for two series LED strings for display backlight and keypad functions (HVLED1 and HVLED2). The integrated charge pump provides the bias for the five low-voltage indicator LED current sinks (LVLED1 to LVLED5). All low-voltage current sinks can have a programmable pattern modulated onto their output current for a wide variety of blinking patterns.

Additional features include a pulse width modulation (PWM) control input for content adjustable backlight control (CABC), and an ambient light sensor interface (ALS) with an internal 8-bit ADC to provide automatic current adjustment based upon ambient light conditions. Both the PWM and ALS inputs can be used to control any high- or low-voltage current sink.

The LM3533 is fully programmable via an I2C-compatible interface. The device is available in a 20-pin DSBGA and operates over a 2.7-V to 5.5-V input voltage range and a −40°C to +85°C temperature range.

The LM3533 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. The high-voltage inductive boost converter provides the power for two series LED strings for display backlight and keypad functions (HVLED1 and HVLED2). The integrated charge pump provides the bias for the five low-voltage indicator LED current sinks (LVLED1 to LVLED5). All low-voltage current sinks can have a programmable pattern modulated onto their output current for a wide variety of blinking patterns.

Additional features include a pulse width modulation (PWM) control input for content adjustable backlight control (CABC), and an ambient light sensor interface (ALS) with an internal 8-bit ADC to provide automatic current adjustment based upon ambient light conditions. Both the PWM and ALS inputs can be used to control any high- or low-voltage current sink.

The LM3533 is fully programmable via an I2C-compatible interface. The device is available in a 20-pin DSBGA and 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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類型 標題 日期
* Data sheet LM3533 Complete Lighting Power Solution for Smartphone Handsets datasheet (Rev. C) PDF | HTML 2015年 9月 27日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Analog PWM Dimming in White-LED Drivers 2016年 12月 21日
Application note Inductor Selection in Boost Converters for LCD Backlight Applications 2016年 10月 24日
Application note Schottky Diode Selection in Asynchronous Boost Converters 2016年 9月 6日
User guide AN-2250 LM3533 Evaluation Kit (Rev. B) 2013年 4月 30日
User guide AN-2250 LM3533 Evaluation Kit 2012年 6月 21日

設計與開發

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開發板

LM3533EVAL — LM3533 評估模組

The LM3533 Evaluation Module (LM3533EVM) is designed to fully evaluate the LM3533 Dual String backlight driver + 5 indicatorLED driver. The LM3533EVM consists of the National Semiconductor USB Interface Board and the LM3533 EvaluationBoard. The Texas Instruments USB Interface Board Rev 1.1 provides (...)

使用指南: PDF
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驅動程式或資料庫

LM3533SW-LINUX — 適用於 LM3533 的 Linux 驅動程式

The Linux driver supports the LM3533 Complete lighting solution 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: Yes
Available through git.ti.com: N/A

Supported Devices:

  • (...)
開發模組 (EVM) 的 GUI

SNVC051 LM3533 Graphical User Interface

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產品
背光 LED 驅動器
LM3533 適於智慧型手機的完整照明解決方案
硬體開發
開發板
LM3533EVAL LM3533 評估模組
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 (...)
封裝 針腳 CAD 符號、佔位空間與 3D 模型
DSBGA (YFQ) 20 Ultra Librarian

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