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参数资料
| 型号： | MSL3164BT |
| 厂商： | Atmel |
| 文件页数： | 13/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 16 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： | 16 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，通用 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 18.15MHz ~ 21.88MHz |
| 电源电压： | 4.75 V ~ 5.5 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 ~ 85°C |
Atmel LED Drivers-MSL3163 and MSL3164
16-string White & RGB LED Drivers with Adaptive Power
Control, E2PROM, and SPI/I2C/SMBus Serial Interface
Detailed Description
The MSL3163 and MSL3164 are highly integrated,
flexible multi-string LED drivers with power supply
control to maximize system efficiency. The drivers easily
connect to a video subsystem. Although optional, this
offers a simple architecture for use in LCD TV backlight
applications. Up to 16 drivers easily connect together
to drive large numbers of LED strings in a system. The
drivers provide multiple methods of controlling LED
brightness, through both peak current control and
through 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 E 2 PROM holds all the default control
register values. At power-up the data in the E 2 PROM
automatically copy directly to the control registers, setting
up the device for operation.
The devices interface to a μC via I 2 C (MSL3163)
or SPI (MSL3164). The robust 1MHz I 2 C interface
supports up to 16 devices on the bus. The 20MHz bus
addressable SPI interface supports up to 16 devices
per Chip Select line. While typically the LED drive PWM
signal is internally generated, both drivers also accept
an external direct-drive PWM signal and offer optional
string drive phase spreading. With direct-drive PWM, a
Pulse Width Modulated signal applied to the PWM input
sets the PWM duty and the frequency of the LEDs drive
signal. With phase spreading enabled, a progressive 1/16
PWM-frame time delay per string helps reduce both the
transient load on the LED power supplies, and the power
supply input capacitor size requirements.
The PWM frequency of the drivers is either synchronized
to an external signal applied to PHI, or generated from
the internal oscillator for stand-alone applications. Typically
the VSYNC signal from the video system is used for
the PHI input. The on-time of each string is individually
programmed via the device registers, providing a peak
resolution of 12-bits when using the on-chip PWM
generator. The actual resolution of the PWM frequency
depends upon on the ratio of the GSC frequency
(typically provided by a systems HSYNC signal, but can
Atmel LED Drivers-MSL3163/MSL3164
be internally generated) to the PHI frequency, because
the on-time of a string is programmed as a 12-bit count
of the number of GSC clock cycles. This count can be
further scaled by an 8-bit Global intensity value, when
enabled. The GSC clock is also used to precisely set each
string’s phase delay so that it is synchronized relative to
the video frame.
The Efficiency Optimizers control a wide range of different
architectures of external DC/DC and AC/DC converters.
Multiple drivers in a system communicate with each
other in real time to select an optimized operating voltage
for the LEDs. This allows design of the power supply
for the worst case Forward Voltage (V f ) of the LEDs
without worrying about excessive power dissipation
issues. During the start-up sequence the MSL3163/4
automatically reduce the power supply voltage to the
minimum voltage required to keep the LEDs in current
regulation. The devices can be configured to periodically
perform this optimization to compensate for changes
of the LED’s forward voltage, and to assure continued
optimum power savings.
Internal Regulators and Enable Input
The MSL3163/4 includes an internal linear regulator that
operates from the 5V nominal input supply, VIN, and provides
an internal 2.5V supply, VDD, to power the low-voltage
internal circuitry. Bypass VDD (pin 36) to GND with a 4.7μF
capacitor. Bypass VIN (pin 35) to GND with a 10μF capacitor.
The MSL3163/4 enable input, EN, enables the device.
Drive EN low to enter low power operation, which lowers
quiescent current draw to less than 20μA. With EN
low the serial interface is ignored. Drive EN high to turn
on the device. When EN is driven high the contents of
the E 2 PROM are boot-loaded into the control registers,
simulating a cold start-up.
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSL3164BT-R | 功能描述:LED照明驱动器 16Str Whte & RGB LED Dr Adptv Pwr Ctrl 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 |
| MSL3167GU | 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F 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 |
| MSL3167GU-R | 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F 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 |
| MSL3168GU | 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F 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 |
| MSL3168GU-R | 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F 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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