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参数资料
| 型号： | MSL3085BT |
| 厂商： | Atmel |
| 文件页数： | 4/20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 |
Atmel LED Driver
MSL3085 Overview
The MSL3085 controls eight strings of series-connected
LEDs at up to 350mA per string. Eight MSL3085s can
share a serial interface. The MSL3085 FET gate drive
output is optimized for FETs requiring no more than
10nC of charge. The MSL3085 PWM engine generates
the PWM signal that drives the strings, or optionally
accepts an external PWM signal.
LED Power Supplies and Efficiency Optimizers
The MSL3085 features two efficiency optimizer outputs
that dynamically adjust the LED string power supplies
to their minimum voltage necessary to drive the LED
strings, while assuring accurate LED current flow. One of
the efficiency optimizers features an input that allows up
to eight devices to be connected in a chain configuration.
When implemented, the chain automatically negotiates,
controls, and optimizes the string power supply for all LED
strings driven by the chain.
Table 1. LED Intensity Controls
The power supplies can use any topology, and are
typically DC-DC boost converters. The efficiency
optimizers rely on close matching of the LEDs
connected to a string supply. The better the matching,
the better the overall efficiency.
Timing, PWM, Intensity Controls
and Synchronization
The PWM LED drive signals synchronize to video frame
timing via the PHI input, and to pixel timing via the GSC
input. Area LED dimming is supported for contrast and
color gamut improvement. With area dimming, motion
blur is reduced by setting each LED string’s PWM
phasing to synchronize string off times with the LCD
update timing. The MSL3085 also includes internal
PWM timing generation for standalone (non-video)
LED lighting applications. Table 1 presents the available
methods of LED intensity control.
4
LED INTENSITY CONTROL
Global LED string current
adjust
Global LED string PWM
Individual LED string PWM
External resistor from FET
source to ground
External PWM input
EFFECT
Reduces string current globally
from maximum set by FET
source resistors
Global PWM scaling
PWM individual string control
Sets maximum individual
string current
Optionally controls all string
PWM drives
REGISTER
ISTR (0x31)
GINT (0x2F)
and ALTGINT (0x30)
PWMn (0x60 thru 0x7D)
and
ALTPWMn (0xA0 thru 0xBD)
-
-
RESOLUTION
8 bits
8 bits
12 bits
-
-
Atmel LED Driver-MSL3085
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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