The LM3532 is a 500-kHz fixed frequency asynchronous boost converter which provides the power for 3 high-voltage, low-side current sinks. The device is programmable over an I²C-compatible interface and has independent current control for all three channels. The adaptive current regulation method allows for different LED currents in each current sink thus allowing for a wide variety of backlight and keypad applications.

The main features of the LM3532 include dual ambient light sensor inputs each with 32 internal voltage setting resistors, 8-bit logarithmic and linear brightness control, dual external PWM brightness control inputs, and up to 1000:1 dimming ratio with programmable fade in and fade out settings.

The LM3532 is available in a 16-pin, 0.4-mm pitch thin DSBGA package. The device operates over a 2.7-V to 5.5-V input voltage range and the −40°C to +85°C temperature range.

• Drives up to 3 Parallel High-Voltage LED Strings at 40 V Each With up to 90% Efficiency
• 0.4% Typical Current Matching Between Strings
• 256 Level Logarithmic and Linear Brightness Control With 14-Bit Equivalent Dimming
• I2C-Compatible Interface
• Direct Read Back of Ambient Light Sensor Via 8-bit ADC
• Programmable Dual Ambient Light Sensor Inputs With Internal Sensor Gain Selection
• Dual External PWM Inputs for LED Brightness Adjustment
• Independent Current String Brightness Control
• Programmable LED Current Ramp Rates
• 40-V Overvoltage Protection
• 1-A Typical Current Limit

• 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)
• 500
• LED current per channel (mA)
• 30
• Peak efficiency (%)
• 89
• Topology
• Boost
• Features
• OVP
• Operating temperature range (C)
• -40 to 125

LM3532的完整型号有：LM3532TME-40A/NOPB、LM3532TMX-40A/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3532TME-40A/NOPB，工作温度：-40 to 125，封装：DSBGA (YFQ)-16，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LM3532TME-40A/NOPB的批量USD价格：.499（1000+）

LM3532TMX-40A/NOPB，工作温度：-40 to 125，封装：DSBGA (YFQ)-16，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LM3532TMX-40A/NOPB的批量USD价格：.416（1000+）

LM3532EVM LM3532 评估模块

The LM3532 Evaluation Board is designed to fully evaluate the LM3532 Triple Output, White LED Driver with I2C-Compatible Interface. For a detailed description of the LM3532 refer to the LM3532 datasheet. The board comes equipped with 3 series strings of 10 white LEDs. Additionally there are two (...)

LM3532SW-LINUX 用于 LM3532 的 Linux 驱动程序

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: (...)

LM3532 Graphical User Interface

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在PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)