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LM3537

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具有四个集成 LDO 的 8 通道 WLED 驱动器

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数据表

LM3537

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数据表 立即订购

产品详情

Number of channels 8 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 5 Type Capacitive Switching frequency (max) (kHz) 1.3 Duty cycle (max) (%) 100 LED current per channel (mA) 25 Peak efficiency (%) 90 Topology Boost, Multi-Channel Features I2C control, PWM control Operating temperature range (°C) -30 to 110 Rating Catalog
Number of channels 8 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 5 Type Capacitive Switching frequency (max) (kHz) 1.3 Duty cycle (max) (%) 100 LED current per channel (mA) 25 Peak efficiency (%) 90 Topology Boost, Multi-Channel Features I2C control, PWM control Operating temperature range (°C) -30 to 110 Rating Catalog
DSBGA (YFQ) 30 5.71999999999999912 mm² 2.5999999999999996 x 2.2

    Lighting:

  • 8-channel Backlight Capability
  • Internal ALS Engine; PWM Input to Support CABC
  • Built-In Power Supply and Gain Control for Ambient Light Sensor
  • Up to 90% Efficiency
  • Adaptive Charge Pump with 1x and 1.5x Ggains for Maximum Efficiency
  • 128 Dimming Steps for Group A, Exponential or Linear Dimming Selectable by Register Setup
  • 8 Linear Dimming States for Group B

    • LDOs:

  • 4 Programmable LDOs (300 mA/150 mA Output Currents)
  • Default Startup Voltage States
  • Low Dropout Voltage: 100 mV typ. at 150 mA Load Current
  • LDO Input Voltage = 1.8V to VIN_A
  • Overload Protection

    • Combined Common Features:

  • Wide Input Voltage Range: 2.7V to 5.5V
  • I2C-Compatible Serial Interface
  • 2 General-Purpose Outputs

All trademarks are the property of their respective owners.

    Lighting:

  • 8-channel Backlight Capability
  • Internal ALS Engine; PWM Input to Support CABC
  • Built-In Power Supply and Gain Control for Ambient Light Sensor
  • Up to 90% Efficiency
  • Adaptive Charge Pump with 1x and 1.5x Ggains for Maximum Efficiency
  • 128 Dimming Steps for Group A, Exponential or Linear Dimming Selectable by Register Setup
  • 8 Linear Dimming States for Group B

    • LDOs:

  • 4 Programmable LDOs (300 mA/150 mA Output Currents)
  • Default Startup Voltage States
  • Low Dropout Voltage: 100 mV typ. at 150 mA Load Current
  • LDO Input Voltage = 1.8V to VIN_A
  • Overload Protection

    • Combined Common Features:

  • Wide Input Voltage Range: 2.7V to 5.5V
  • I2C-Compatible Serial Interface
  • 2 General-Purpose Outputs

All trademarks are the property of their respective owners.

The LM3537 is a highly integrated LED driver capable of driving 8 LEDs in parallel for single display backlighting applications. Independent LED control allows for a subset of the main display LEDs to be selected for partial illumination applications.

I2C-compatible control allows full configurability of the backlighting function. The LM3537 provides multi-zone Ambient Light Sensing allowing autonomous backlight intensity control in the event of changing ambient light conditions. A PWM input is also provided to give the user a means to adjust the backlight intensity dynamically based upon the content of the display.

Four integrated LDOs are fully configurable through I2C capable of addressing point-of-load regulation needs for functions such as integrated camera modules. The LDOs can be powered from main battery source, or by a fixed output voltage of an external buck converter (post regulation) leading to higher conversion efficiency.

The LM3537 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

LM3537 is offered in a tiny 30-bump DSBGA package.

The LM3537 is a highly integrated LED driver capable of driving 8 LEDs in parallel for single display backlighting applications. Independent LED control allows for a subset of the main display LEDs to be selected for partial illumination applications.

I2C-compatible control allows full configurability of the backlighting function. The LM3537 provides multi-zone Ambient Light Sensing allowing autonomous backlight intensity control in the event of changing ambient light conditions. A PWM input is also provided to give the user a means to adjust the backlight intensity dynamically based upon the content of the display.

Four integrated LDOs are fully configurable through I2C capable of addressing point-of-load regulation needs for functions such as integrated camera modules. The LDOs can be powered from main battery source, or by a fixed output voltage of an external buck converter (post regulation) leading to higher conversion efficiency.

The LM3537 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

LM3537 is offered in a tiny 30-bump DSBGA package.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM3537 8-Channel WLED Driver with Four Integrated LDOs 数据表 (Rev. B) 2013年 5月 3日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日

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包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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