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| 型号： | MSL3085BT |
| 厂商： | Atmel |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 8 STRING |
| 产品培训模块： | Industrial Panel Backlighting Driver ICs LED Lighting Drivers LED Driver Basics |
| 标准包装： | 2,500 |
| 系列： | Adaptive SourcePower™ |
| 拓扑： | 交直流离线开关，PWM |
| 输出数： | 8 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 背光，通用 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 19.4MHz ~ 20.6MHz |
| 电源电压： | 10.8 V ~ 13.2 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN（6x6） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 105°C |
Using Multiple Atmel LED Driver-MSL3085s to Control a Common Power Supply
Cascade multiple MSL3085 devices into a chain configuration (Figure 5), with the FBI1 of one device connected to the
FBO1 of the next. Connect the first FBO1 to the power supply feedback resistor node through a diode, and the unused
FBI1 input to ground as close to the MSL3085 as possible. Assure that all strings powered by the common supply are
assigned to FBO1 using string set registers (STRnSET) 0x20 - 0x3D (FBO1 is the power-up default setting for all
strings). The chained devices work together to ensure that the system operates at optimum efficiency. Note that the
accuracy of the feedback chain can degrade through each link of the FBI1/FBO1 chain by as much as 2%. Determine the
potential worst case maximum FBO1 current, I FBOn(MAX/MIN) , using:
I FBO(MAX / MIN) = 255 μ A * (0.98) N -1 ,
where N is the number of MSL3085s connected in series. Use this result in the above R TOP resistor equation for the term
I FBOn(MAX) instead of using 255μA.
Take care in laying out the traces for the efficiency optimizer connections. Minimize the FBI1/FBO1 trace lengths as much
as possible. Do not route the signals close to traces with large variations in voltage or current because noise may couple into
FBI1. If these traces must be routed near noisy signals, shield them from noise by using ground planes or guard traces.
Figure 5. Example of Cascading Multiple Devices to Optimize a Common String Power Supply.
14
Atmel LED Driver-MSL3085
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相关代理商/技术参数 |
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|---|---|
| MSL3085BT-R | 功能描述:LED照明驱动器 8-String White & RGB LED Drivers with Ad RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MSL3086-IU | 功能描述:LED照明驱动器 8-Str LED Driver Internal Boost Cntr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MSL3086-IUR | 功能描述:LED照明驱动器 8-Str LED Driver Internal Boost Cntr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MSL3088-IU | 功能描述:LED照明驱动器 8-Str LED Driver Intrnl Bst Cntr/Phas RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MSL3088-IUR | 功能描述:LED照明驱动器 8-Str LED Driver Intrnl Bst Cntr/Phas RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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