搜索
发布采购
更新日期：2024-04-01 00:04:00
产品简介：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
查看详情LM2756TM 供应商
- 公司
- 型号
- 品牌
- 封装/批号
- 数量
- 地区
- 日期
- 说明
- 询价
-
TI
-
原厂原装
22+ -
3288
-
上海市
-
-
-
一级代理原装
LM2756TM 中文资料属性参数
- 用途:：显示背光
- 拓扑结构:：电荷泵
- 输出通道数字:：8
- 输出电流:：30mA
- 输出电压:：4V
- 输入电压:：2.7V 到 5.5V
- 调光控制类型:：模拟
- 工作温度范围:：-30°C 到 +85°C
- 开关频率:：1.3MHz
- SVHC(高度关注物质):：No SVHC (19-Dec-2011)
- 器件标号:：2756
- 封装类型:：Micro SMD
- 接口类型:：Parallel, Common Anode
- 效率:：92%
- 数据 / 控制接口:：串行口, I2C
- 显示类型:：发光二极管
- 电源电压 最大:：5.5V
- 电源电压 最小:：2.7V
- 表面安装器件:：表面安装
- 针脚数:：20
- 驱动芯片类型:：发光二极管
产品特性
- 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
产品概述
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.
LM2756TM 电路图
LM2756TM 电路图