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LT8356-1

更新时间： 2024-09-24 14:55:03
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
27页 2779K
描述
具有指数PWM和可扩展调光的100VIN/120VOUT LED控制器

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中文翻译

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LT8356-1 数据手册

 浏览型号LT8356-1的Datasheet PDF文件第2页浏览型号LT8356-1的Datasheet PDF文件第3页浏览型号LT8356-1的Datasheet PDF文件第4页浏览型号LT8356-1的Datasheet PDF文件第5页浏览型号LT8356-1的Datasheet PDF文件第6页浏览型号LT8356-1的Datasheet PDF文件第7页 
LT8356-1  
100V /120V LED Controller with  
IN  
OUT  
Exponential PWM and Scalable Dimming  
FEATURES  
DESCRIPTION  
The LT®8356-1 is a DC/DC controller designed to drive  
high current LEDs. The fixed frequency, current mode  
architecture results in stable operation over a wide range  
of supply and output voltages. A voltage feedback pin  
serves as the input for several LED protection features  
and makes it possible for the converter to operate as a  
constant-voltage source. The LT8356-1 can implement  
boost, boost-to-battery, buck-mode, SEPIC, and flyback  
LED drivers.  
n
128:1 Internal Exponential PWM Dimming  
Two-Pin Multiplying Analog Dimming  
Internal Spread Spectrum Frequency Modulation  
20,000:1 External PWM Dimming at 100Hz  
Rail-to-Rail LED Current Sensing: 0V to 120V  
2% LED Current Regulation  
n
n
n
n
n
n
n
n
n
2% Output Voltage Regulation  
LED Short/Open Protection and Indication  
Wide Input Voltage Range (5V to 100V)  
PMOS Switch Driver for PWM and Output  
Disconnect  
The LT8356-1 senses output current at the high or low  
side of the load. The product of CTRL and IADJ inputs  
provides analog programming of the output current. The  
PWM input and PWMTG high side PMOS driver provides  
precision time-based LED dimming capability. When  
driven by an external digital signal, the PWM input pro-  
vides LED dimming ratios of up to 20,000:1 at 100Hz.  
When driven by a constant voltage, the PWM input selects  
n
n
n
n
n
Constant-Voltage and Constant-Current Regulation  
Adjustable Switching Frequency Up to 2MHz  
Programmable V UVLO with Hysteresis  
IN  
Side Solderable 20-Lead 3mm × 4mm QFN Package  
AEC-Q100 Qualified for Automotive Applications  
APPLICATIONS  
from one of 128 internally generated, precision, expo  
-
nentially spaced dimming ratios ranging from 0.78% up  
to 100%.  
n
High Voltage LED Applications  
n
Automotive Head Lamps/Running Lamps  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. patents, including 7199560, 7321203, 7746300, 8116045.  
n
Accurate Current Limited Voltage Regulator  
TYPICAL APPLICATION  
40W Boost LED Driver with Thermal Derating and Trim  
Efficiency vs VIN  
ꢀꢁꢁ  
47µH  
V
IN  
V
REF  
2.2µF  
×2  
6V TO 40V  
1M  
10k  
4.7µF  
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
(80V TRANSIENT)  
V
GATE  
IN  
46.4k  
499k  
130k  
SENSE  
EN/UVLO  
15mΩ  
= 7A (TYP)  
I
LIM  
GND  
FB  
ISP  
V
REF  
625mΩ  
0.4A  
PWM  
CTRL  
6.04k  
LT8356-1  
1µF  
ISN  
PWMTG  
100k  
NTC  
ꢀAꢁꢂ ꢃ ꢄ.ꢅꢆ  
ꢀAꢁꢂ ꢃ ꢄꢅ  
28.0k  
INTV  
CC  
2.2µF  
100k  
FAULT  
ꢀ
ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ  
IADJ  
RT  
FAULT  
ꢀ
ꢀꢁꢂ  
ꢀꢁ  
40W LED STRING  
36k  
ꢀꢁꢂꢃꢄ ꢅAꢆꢄꢇ  
100k  
TRIM  
V
C
137k  
1nF  
83561 TA01a  
f = 200kHz  
Rev. A  
1
Document Feedback  
For more information www.analog.com  
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中文翻译

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