LM2756中文资料具有 32 指数调光步进、采用微型 SMD 封装的多显示无电感器 LED 驱动器数据手册TI规格书

描述 Description

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.

特性 Features

• Drives up to 8 LEDs with up to 30mA of Diode Current Each
• 8 Linear Dimming States for Groups B (Up to 3 LEDs) and D1C (1 LED)
• 3 Independently Controlled LED Groups Via I2C Compatible Interface
• Total Solution Size 2
• 0.4% Accurate Current Matching
• True Shutdown Isolation for LED’s
• Active High Hardware Enable