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LT3482

更新时间： 2024-09-25 05:43:31
品牌 Logo 应用领域
凌特 - Linear 转换器监视器光电二极管
页数 文件大小 规格书
12页 188K
描述
90V Boost DC/DC Converter with APD Current Monitor

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中文翻译

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LT3482 数据手册

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LT3482  
90V Boost DC/DC  
Converter with APD  
Current Monitor  
U
DESCRIPTIO  
FEATURES  
The LT®3482 is a fixed frequency current mode step-up  
DC/DC converter with voltage doubler designed to bias  
avalanche photodiodes (APDs) in optical receivers. It can  
provide up to 90V output. The LT3482 features high side  
APD current monitoring with better than 10% relative ac-  
curacy over the entire temperature range. The integrated  
power switch, Schottky diodes and APD current monitor  
allow a small converter footprint and low solution cost.  
Constantswitchingfrequencyresultsinpredictableoutput  
noise that is easy to filter. The inductor-based topology  
ensures an input free from switching noise. An integrated  
high side current monitor produces a current proportional  
to APD current with better than 10% relative accuracy  
over four decades of dynamic range in the input range of  
250nA to 2.5mA. This current can be used as a reference  
to provide a digitally programmed output voltage via the  
CTRL pin. The LT3482 is available in the tiny footprint  
(3mm × 3mm) 16-lead QFN package.  
■
High Output Voltage: Up to 90V  
■
Integrated Schottky Diodes  
■
48V, 280mA Internal Switch  
High Side APD Current Monitor  
■
■
Adjustable Switching Frequency: 650kHz or 1.1MHz  
■
Wide V Range: 2.5V to 16V  
IN  
■
■
■
■
■
Surface Mount Components  
Low Shutdown Current: <1µA  
Soft-Start  
Internal Compensation  
CTRL Pin Allows Output Adjustment with No Polarity  
Inversion  
3mm × 3mm 16-Lead QFN Package  
U
■
APPLICATIO S  
■
APD Bias  
PIN Diode Bias  
Optical Receivers and Modules  
Fiber Optic Network Equipment  
■
■
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
■
U
TYPICAL APPLICATIO  
0.1µF  
10µH  
V
IN  
5V  
Output Voltage Ripple  
SW  
PUMP  
1µF  
V
f
MONIN  
IN  
LT3482  
SET  
OFF ON  
V
V
SHDN  
OUT2  
V
APD  
0.47µF  
0.47µF  
RIPPLE  
1M  
0.1µF  
CTRL  
GND  
OUT1  
FB  
100 V/DIV  
85V  
AT 2.5mA  
MON  
APD  
14k  
10k  
0.1µF  
3482 TA01b  
10nF  
500ns/DIV  
3482 TA01a  
3482fa  
1
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中文翻译

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