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参数资料
| 型号： | MSL2162DQ |
| 厂商： | Atmel |
| 文件页数： | 17/24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： | 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： | 64-VFQFN 裸露焊盘 |
| 供应商设备封装： | 64-TQFN（9x9） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 105°C |
Atmel LED Driver-MSL2162
16-string White and RGB LED Driver with
Adaptive Configuration, EEPROM, and SPI Bus
Detailed Description
The MSL2162 is a highly integrated, flexible, multi-string
LED driver. It drives external MOSFETs to allow high
LED string currents, and includes power supply control
to maximize efficiency. The driver optionally connects
to a video subsystem to offer a simple architecture
for use in LCD TV backlight applications. Up to eight
devices easily connect together to drive large numbers
of LED strings in a system. The driver provides 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 factory programmed E 2 PROM values are changed
using the serial interface when a different power-up
condition is desired.
The device interfaces to a microcontroller using an SPI
compatible serial interface. The 20MHz SPI compatible
interface supports up to eight devices per Chip Select
line. While typically the LED drive PWM signal is
internally generated, the driver also accepts an external
direct PWM drive signal applied to the PWM input that
sets the PWM duty and the frequency of the string
drive signals. The MSL2162 also allows phase spreading
when external PWM direct drive is used. With phase
spreading enabled, a progressive 1/16 phase 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. A frequency multiplier
(1x to 32x) processes this signal for use by the internal
PWM engine. 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
Atmel LED Driver-MSL2162
depends upon on the ratio of the GSC frequency
(typically provided by a systems HSYNC signal, but can
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 to its
physical position 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 MSL2162 automatically reduces 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 MSL2162 includes two internal linear regulators
that provide VCC (5V) and VDD (2.5V) for internal
circuitry. VIN (12V nominal) supplies the VCC and VDD
regulators. Bypass VIN to ground with a 10μF capacitor
close to the device. Bypass VCC to ground with a 4.7μF
capacitor close to the device. Bypass VDD to ground
with a 4.7μF capacitor close to the device.
The MSL2162 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.
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSL2162DQ-R | 功能描述:LED照明驱动器 16String White & RGB LED Driver 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 |
| MSL2164-DU | 功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 3FO 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 |
| MSL2164-DUR | 功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 3FO 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 |
| MSL2166-DU | 功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 2FO 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 |
| MSL2166-DUR | 功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 2FO 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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