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参数资料
| 型号： | MSL1061AV |
| 厂商： | Atmel |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 6 STRING |
| 产品培训模块： | Industrial Panel Backlighting Driver ICs LED Lighting Drivers LED Driver Basics |
| 标准包装： | 2,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，通用 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 990kHz ~ 1.21MHz |
| 电源电压： | 4.75 V ~ 36 V |
| 输出电压： | 48V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
Detailed Description
The MSL1061/64 is an LED driver with integrated boost
regulator for driving an array of LEDs with up to 8W of
power. The I2C/SMB serial interface, logic controls, and
fault management make the MSL1061/64 especially
suited to drive up to 72 white LEDs for portable device
backlighting. It is also ideal for industrial lighting and
signage applications, and can, for example, drive a 6
string x 18 series LED array totaling 108 red LEDs
(2.5V LED forward voltage drop).
The MSL1061/64 includes six current sinks (STR0
through STR5) that each control the LED current of
series-connected LEDs. A built-in step-up (boost)
regulator supplies power to the LEDs. The MSL1061/64
controls the output voltage of the boost regulator such
that all LED strings have sufficient voltage to maintain
regulated LED current. This control loop operates
automatically without any user interaction or set-up.
Internal Oscillator - R4
The MSL1061/64 uses an internal oscillator with
frequency set by resistor R4 from OSC to GND (Figure
6). Use 115k Ω ±1% resistance value for R4. This sets
the internal LED dimming PWM frequency to 11MHz
and the boost regulator PWM frequency to 1.1MHz.
When using different values for R4 the MSL1061/64
performance is not guaranteed.
Setting the Full-scale LED String Current - R5
R5 sets the full-scale static LED current for all enabled
strings (Figure 6) from ILED to GND. The maximum full-
scale LED current is 30mA. The equation for calculating
external resistor R5 (Figure 6) to set the full-scale LED
string current I ILED is:
Application Information
I ILED =
2000
R 5
VCC and VDD Regulators
The MSL1061/64 includes two linear voltage regulators
to generate the internal voltage rails, VDD and VCC. The
regulators allow the MSL1061/64 to operate directly
from the same higher voltage supply, VIN, which supplies
the LED boost regulator. Use the VDD and VCC regulators
only to power the MSL1061/64’s internal circuitry,
therefore do not draw any external current from them.
The VCC regulator generates a nominally 6V rail from VIN.
VCC powers the boost regulator’s power switch and the
VDD regulator. Bypass VCC to GND either with a 10μF
or greater ceramic capacitor or with a 10μF or greater
tantalum capacitor in parallel with a 1μF ceramic capacitor.
In applications where there is a local 4.75V to 6.5V
supply available, power VCC and VIN directly from this
supply. In this case use this supply or a separate higher
voltage supply to power the LED boost regulator. When
using a higher voltage supply connect it to the inductor,
L1 (Figure 6), and not to the MSL1061/64.
The VDD regulator generates a nominally 2.9V rail from
VCC. VDD operates the internal low-voltage circuits.
Bypass VDD to GND with a 4.7μF or greater capacitor.
16
where R5 is in kilohms and ILED is in milliamperes.
A value of 100k Ω for resistor R5 sets 20mA full-scale
LED current. The minimum allowed value for R5 is
66.7k Ω , which sets 30mA full-scale LED current.
Reduce the static LED current from full-scale using the
LED string current register. This register reduces LED
current proportional to the 4-bit IDAC register.
Atmel LED Drivers-MSL1061/MSL1064
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSL1061AV-R | 功能描述:LED照明驱动器 6Str LED Dvr Dgtl 1.1MHz 48V r 1.5% 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 |
| MSL1064 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:6-string PWM LED Driver with Digitally Compensated, 1.1MHz, 48V Boost Regulator, ±1.5% Current Balance, I2C Interface |
| MSL1064AW | 功能描述:LED照明驱动器 6Str PWM LED Dvr Dgt 1.1MHz 48V 1.5% I 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 |
| MSL1064AW-R | 功能描述:LED照明驱动器 6Str PWM LED Dvr Dgt 1.1MHz 48V1.5% I 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 |
| MSL1064-TC | 功能描述:LED照明驱动器 6Str PWM LED Dvr Dgt 1.1MHz 48V+/-1.5% I 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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