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| 型号： | MSL1060AW |
| 厂商： | Atmel |
| 文件页数： | 19/20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： | 24-WQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN（5x5） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
Atmel LED Driver-MSL1060
6-string PWM LED Driver with Digitally Compensated, 1.1MHz,
48V Boost Regulator and ±1.5% LED String Current Balance
( V in ) * ? ? 1 ?
? V in ?
V out ? ?
L =
IADJ Input - LED Temperature Compensation
and/or Ambient Light Sensing
The MSL1060 analog control input, IADJ, allows reduction
of the full-scale static LED current from the current set by
resistor R5. IADJ controls the LED current proportionally
to the voltage on IADJ, between 0V and 1.22V. For
example, setting IADJ to 0V reduces the full-scale static
LED current to zero. Setting IADJ to 0.61 V reduces the
full-scale static LED current to half. IADJ voltage greater
than 1.22V retains full-scale static LED current. If analog
control is not used, connect IADJ to VDD.
For automatic temperature compensation, connect a
negative-temperature-co-efficient (NTC) thermistor
To select inductor use the following equations
?
?
( 0 . 3 ) * ( I in ) * ( f sw )
Where
Vout = Forward voltage of LED string + 0.6V
Vin = Input voltage
f sw = Switching frequency of boost controller, this is
1.1MHz for MSL1060
and
from VDD to IADJ and a resistor from IADJ to GND. As
temperature rises, the voltage at IADJ also increases,
effectively increasing the LED current.
For automatic ambient light compensation, connect a
I in =
I LED ( total ) * V out
0 . 9 * V in
photodiode or integrated ambient light sensor (ALS) to
the IADJ input. As ambient light intensives, the voltage at
IADJ also increases, effectively increasing the LED current.
Boost Regulator Components
The internally compensated boost regulator, includes an
internal, high-voltage FET power switch, and requires
only an inductor, rectifier, and bypass capacitors to
operate. The current mode boost regulator operates in
continuous conduction mode (CCM) or discontinuous
conduction mode (DCM). In CCM, the inductor current
does not fall to zero when operating at full power, which
reduces inductor ripple current and switching noise. The
boost regulator and internal compensation switches at
1.1MHz. Use 115k ? for resistor R4 from OSC to GND
(Figure 16) to set the oscillator frequency. Select the
inductor, rectifier diode, and output capacitors according
to the following guidelines.
Choose an inductor with a peak current rating > 2A.
Common inductor values can range from 4.7 μ H to 22 μ H.
To minimize losses in the rectifier, choose a fast-
switching diode with low forward drop. Ensure that the
rectifier can withstand a reverse voltage equal to the
regulator output voltage. The average forward current
is equal to the total LED string current (for example 6
strings x 30mA = 180mA), while the peak current is
equal to the inductor peak current (2A).
The boost output capacitor holds the voltage at the
output of the boost regulator while the internal power
switch is on. Use ceramic boost output capacitors
because of their small size and high ripple current
capacity. Derate ceramic capacitors for operating voltage
because the voltage coefficient decreases the effective
capacitance with increased operating voltage. Use two
parallel-connected 1μF 100V X7R ceramic capacitors and
a 10μH inductor with a 1.7A peak current rating.
Over-voltage Protection (OVP) - R8 and R9
The OVP input sets the boost regulator’s output voltage
upper limit, and protects the boost regulator from
common faults such as open circuit LEDs. Resistors R8
and R9 (Figure 16) set the OVP voltage V TRIP is set by:
V TRIP = V OVP
( R 8 + R 9 )
R 9
where V OVP =1.28V, nominal.
Atmel LED Driver-MSL1060
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSL1060AW-R | 功能描述:LED照明驱动器 6 Str PWM w Digtl 1.1MHz 48VBoost 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 |
| MSL1061 | 制造商:Atmel Corporation 功能描述:LED DRVR 72Segment 5V/9V/12V/15V/18V/24V 28-Pin TQFN |
| MSL1061AV | 功能描述:LED照明驱动器 6StrLED 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 |
| 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 |
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