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参数资料
| 型号： | MSL2100BR |
| 厂商： | Atmel |
| 文件页数： | 13/20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： | 18MHz ~ 22MHz |
| 电源电压： | 10.8 V ~ 13.2 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（6x6） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
Atmel LED Driver-MSL2100
8-string, High-power, White or RGB LED Drivers for TVs,
Monitors, or Intelligent Solid-state Lighting
Detailed Description
The MSL2100 is a highly integrated, flexible, multi-string
LED driver that uses external MOSFETs to allow high
LED string currents and includes power supply control
for three supplies to maximize efficiency. The driver
optionally connects to a video subsystem to offer easy
synchronization for use in LCD TV backlight applications.
Up to sixteen devices may be connected together to
drive a large number of LED strings in a system. The
drivers provide multiple methods of controlling LED
brightness through both peak current control and pulse
width control of the string drive signals. Peak current
control offers excellent color consistency, while pulse
width control allows brightness management. An on-chip
EEPROM holds all the default control register values. At
power-up, the data in the EEPROM are automatically
copied directly to the control registers, setting up the
device for operation. The factory programmed EEPROM
values are changeable through the serial interface if a
different power-up condition is desired.
The device interfaces to an MCU via the I 2 C/SMBus
interface. The robust 1MHz I 2 C/SMBus interface
supports up to sixteen devices on the bus, and is fast
enough to support area dimming for 16 interconnected
devices. While typically the LED drive PWM signal is
internally generated by the PWM engine, the device
also accepts an external direct PWM drive signal
applied to the PWM input to set the duty cycle and the
frequency of the LED drive signals. When using the
PWM engine, the MSL2100 allows phase spreading of
the LED drive signals, which helps reduce the transient
load on the LED power supplies. Phase spreading is not
supported for direct PWM drive.
The PWM frequency of the drivers is easily synchronized
to an external video signal applied to PHI. Typically, the
VSYNC signal from the video system is used as the PHI
input. A frame-rate multiplier (1x to 16x) processes
this signal for use by the PWM engine. The on time of
each string is individually programmed via the device
registers, providing a peak resolution of 10 bits when
using the on-chip PWM generator. The actual resolution
Atmel LED Driver-MSL2100
of the PWM frequency depends on the ratio of the GSC
frequency (typically provided by a systems HSYNC
signal) to the PHI frequency because the on time of
a string is programmed as a function (8-bit count) of
the number of GSC cycles. This count can be further
scaled by a 6-bit global intensity register, when
enabled. The GSC clock is also used to precisely set
each string’s phase delay to be synchronized with its
physical position relative to the video frame. Additionally,
the MSL2100 features programmable temperature
compensation, which throttles back the PWM on time of
all strings when the temperature of the LEDs exceeds a
programmable threshold.
The Efficiency Optimizers control a wide range of
different external DC-DC and AC-DC converter
architectures. Multiple drivers in a system communicate
in real time among themselves to select an optimized
operating voltage for the LEDs. This allows design of
the power supplies for the worst case forward voltage
(V f ) of the LEDs without concern about excessive
power dissipation issues. During the start-up sequence,
the MSL2100 automatically reduces the power supply
voltage to the minimum required to keep the LEDs
in current regulation. The devices are configured to
periodically perform this optimization to compensate
for changes in LED forward voltage, and to assure
continued optimum power savings.
Internal Regulators and Enable Input
The MSL2100 includes an internal linear regulator
powered from VIN that provides 2.5V, VDD, to power
the internal circuitry. Bypass VDD to GND with a 10μF
or greater capacitor.
The enable input, EN, turns the VDD regulator on and
off. To turn on the MSL2100, force EN high with a 5V
logic level, and force EN low to turn it off. When EN is
low, the MSL2100 enters low-power mode, and the
serial interface is ignored. Toggling EN low also clears all
fault registers and releases FLTB. Faults re-establish if
the conditions that generated them persist.
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSL2100BR-R | 功能描述:LED照明驱动器 8 Str Hi Pwr, White or RGB LED Drivers 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 |
| MSL2160 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:16-string, White and RGB LED Drivers with Adaptive Configuration,EEPROM, and SPI/I2C/SMBus Serial Interface |
| MSL2160DQ | 功能描述:LED照明驱动器 16-StringRGBLED Dvrs AdapPwrContr E2Prom 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 |
| MSL2160DQ-R | 功能描述:LED照明驱动器 16String White & RGB 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 |
| MSL2161 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface |
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