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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)
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RESOLUTION
8 bits
8 bits
12 bits
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Atmel LED Driver-MSL3085
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相关代理商/技术参数
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
MSL3162BT
功能描述:LED照明驱动器 16String RGB & White LED Drivers with A 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
MSL3162BT-ET1R
制造商:Atmel Corporation 功能描述:LED DRIVER - Bulk
MSL3162BT-R
功能描述:LED照明驱动器 16String RGB & White LED Drivers with A 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