The LM2756 is a highly integrated, switched-capacitor, multi-display LED driver that can drive up to 8 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver excellent current and brightness matching in all LEDs.

The LED driver current sinks are split into three independently controlled groups. The primary group (Group A) can be configured to drive four, five or six LEDs for use in the main phone display, while the secondary group (Group B) can be configured to drive one, two or three LEDs for driving secondary displays, keypads and/or indicator LEDs. An additional driver, D1C, is provided for additional indicator lighting functions.

The device 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.

The LM2756 is available in TI's tiny 20-bump, 0.4mm pitch, thin DSBGA package.

• Drives up to 8 LEDs with up to 30mA of Diode Current Each
• 32 Exponential Dimming Steps with 800:1 Dimming Ratio for Group A (Up to 6 LEDs)
• 8 Linear Dimming States for Groups B (Up to 3 LEDs) and D1C (1 LED)
• Programmable Auto-Dimming Function
• 3 Independently Controlled LED Groups Via I2C Compatible Interface
• Up to 90% Efficiency
• Total Solution Size < 21mm2
• Low Profile 20 Bump DSBGA Package (1.615mm × 2.015mm × 0.6mm)
• 0.4% Accurate Current Matching
• Internal Soft-Start Limits Inrush Current
• True Shutdown Isolation for LED’s
• Wide Input Voltage Range (2.7V to 5.5V)
• Active High Hardware Enable

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• Number of channels (#)
• 8
• Vin (Min) (V)
• 2.7
• Vin (Max) (V)
• 5.5
• Vout (Min) (V)
• 2.7
• Vout (Max) (V)
• 6
• Type
• Capacitive
• Switching frequency (Max) (kHz)
• 1600
• LED current per channel (mA)
• 30
• Peak efficiency (%)
• 92
• Topology
• Boost, Current Sink
• Features
• I2C Control
• Operating temperature range (C)
• -30 to 85

LM2756的完整型号有：LM2756TM/NOPB、LM2756TMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM2756TM/NOPB，工作温度：-30 to 85，封装：DSBGA (YFQ)-20，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LM2756TM/NOPB的批量USD价格：1.26（1000+）

LM2756TMX/NOPB，工作温度：-30 to 85，封装：DSBGA (YFQ)-20，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LM2756TMX/NOPB的批量USD价格：1.05（1000+）

LM2756TMEV — 具有 32 指数调光步进（采用微型 SMD 封装）的多显示无电感器 LED 驱动器

The LM2756 is a highly integrated, switched-capacitor, multi-display LED driver that can drive up to 8 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver excellent current and brightness matching in all LEDs

The LM2756 is a highly integrated, (...)

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