The LM3631 is a complete LCD backlight and bias power solution for mobile devices. This one-chip solution has an integrated high-efficiency backlight LED driver and positive/negative bias supplies for LCD drivers addressing the power requirements of high-definition LCDs. Integrated solution allows small solution size while still maintaining high performance.

Capable of driving up to 16 LEDs, the LM3631 is ideal for small- to medium-size displays. Two additional programmable LDO regulator outputs can be used to power display controller, LCD gamma reference, or any additional peripherals.

A high level of integration and programmability allows the LM3631 to address a variety of applications without the need for hardware changes. Voltage levels, backlight configuration, and power sequences are all configurable through I²C interface.

• Drives up to Two Strings with Maximum of Eight LEDs in Series
  • Integrated Backlight Boost with 29-V Maximum Output Voltage
  • Two Low-Side Constant-Current LED Drivers with 25-mA Maximum Output Current
• Backlight Efficiency Up to 90%
• 11-Bit Linear or Exponential Dimming with up to 17-Bit Output Resolution
• External PWM Input for CABC Backlight Operation
• LCD Bias Efficiency > 85%
• Programmable Positive LCD bias, 4-V to 6-V, 100-mA Maximum Output Current
• Programmable Negative LCD bias, –4-V to –6-V, 80-mA Maximum Output Current
• Two Positive Programmable LDO Reference Outputs
  • 4-V to 6-V, 50-mA Maximum Output Current
  • 1.8-V to 3.3-V, 80-mA Maximum Output Current
• 2.7-V to 5-V Input Voltage Range

• Number of channels (#)
• 2
• Vin (Min) (V)
• 2.7
• Vin (Max) (V)
• 5
• Vout (Min) (V)
• 0
• Vout (Max) (V)
• 30
• Type
• Inductive
• Switching frequency (Max) (kHz)
• 1100
• LED current per channel (mA)
• 25
• Peak efficiency (%)
• 90
• Topology
• Boost, Current Sink, LDO, Multi-Channel
• Features
• Adjustable Switch Frequency, CABC, Enable/Shutdown, I2C Control, OVP, PWM Control, Power Good, Soft Start
• Operating temperature range (C)
• -40 to 85

LM3631的完整型号有：LM3631YFFR，以下是这些产品的关键参数及官网采购报价：

LM3631YFFR，工作温度：-40 to 85，封装：DSBGA (YFF)-24，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LM3631YFFR的批量USD价格：.924（1000+）

LM3631EVM — LM3631EVM 完全 LCD 背光和偏置电源评估模块

The Texas Instruments LM3631 Evaluation Module (EVM) helps designers evaluate the operation and performance of the LM3631 Complete LCD Backlight and Bias Power unit. The LM3631EVM uses the LM3631’s three LDO regulators and an inverting charge pump to provide +-5.6V, 5.5V and 3.3V output (...)

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: (...)

LM3631EVM Software

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