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LT8391D

更新时间： 2023-12-20 18:45:08
品牌 Logo 应用领域
亚德诺 - ADI 开关驱动控制器驱动器
页数 文件大小 规格书
26页 1999K
描述
60V同步4开关降升压LED驱动器控制器

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中文翻译

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LT8391D 数据手册

 浏览型号LT8391D的Datasheet PDF文件第2页浏览型号LT8391D的Datasheet PDF文件第3页浏览型号LT8391D的Datasheet PDF文件第4页浏览型号LT8391D的Datasheet PDF文件第5页浏览型号LT8391D的Datasheet PDF文件第6页浏览型号LT8391D的Datasheet PDF文件第7页 
LT8391D  
60V Synchronous  
4-Switch Buck-Boost LED  
Driver Controller  
FEATURES  
DESCRIPTION  
The LT®8391D is a synchronous 4-switch buck-boost LED  
controller that regulates LED current from an input voltage  
above, below, or equal to the output voltage. The propri-  
etary peak-buck peak-boost current mode control scheme  
allows adjustable 150kHz to 650kHz fixed frequency oper-  
ation, or internal 15% triangle spread spectrum opera-  
tion for low EMI. With 4V to 60V input, 0V to 60V output,  
and seamless low noise transitions between operation  
regions, the LT8391D is ideal for LED driver applications  
in automotive, industrial, and battery-powered systems.  
n
4-Switch Single Inductor Architecture Allows V  
IN  
Above, Below or Equal to V  
OUT  
n
n
n
n
n
n
n
n
n
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Synchronous Switching: Up to 98% Efficiency  
Proprietary Peak-Buck Peak-Boost Current Mode  
Wide V Range: 4V to 60V  
IN  
Wide V  
Range: 0V to 60V  
OUT  
4% LED Current Accuracy  
No Top MOSFET Refresh Noise in Buck or Boost Mode  
Adjustable Frequency: 150kHz to 650kHz  
Flicker-Free Spread Spectrum for Low EMI  
Open and Short LED Protection with Fault Reporting  
AEC-Q100 Qualified for Automotive Applications  
The LT8391D provides LED current PWM dimming with  
an option low-side NMOS switch. The CTRL pin provides  
flexible 20:1 analog dimming with 4% LED current accu-  
racy at 100mV full scale. Fault protection is provided to  
detect an open or short LED condition, during which the  
LT8391D retries, latches off, or keeps running.  
APPLICATIONS  
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Automotive Head Lamps/Running Lamps  
High Frequency LED Lighting  
n
All registered trademarks and trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
98% Efficient 50W (25V, 2A) Buck-Boost LED Driver  
Efficiency vs VIN  
4mΩ  
10µH  
V
IN  
6V TO 55V  
100  
10µF  
50V  
×2  
4.7µF  
100V  
×2  
0.1µF  
33µF  
63V  
0.1µF  
SW1 LSP LSN  
SW2  
98  
96  
94  
92  
90  
88  
86  
84  
82  
80  
BOOST  
BST1  
BST2  
BG2  
GND  
BUCK  
BG1  
M2  
M3  
BUCK-BOOST  
TG1  
TG2  
V
IN  
V
OUT  
1µF  
1µF  
1M  
499k  
34.8k  
EN/UVLO  
FB  
SSFM OFF  
LT8391D  
SPRD  
ISP  
221k  
SSFM ON  
INTV  
CC  
0.05Ω  
INTV  
CC  
0
10  
20  
30  
40  
50  
60  
ISN  
4.7µF  
100k  
INPUT VOLTAGE (V)  
8391d TA01b  
FAULT  
FAULT  
PWM  
PWM DIM  
25V  
2A  
LED  
ANALOG DIM  
CTRL  
100k  
V
REF  
0.47µF  
SS  
V
RT  
C
2.2k  
10nF  
100k  
f = 400kHz  
0.1µF  
8391d TA01a  
Rev. 0  
1
Document Feedback  
For more information www.analog.com  
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