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ADN8834MB-EVALZ

更新时间： 2024-11-25 02:53:03
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
30页 1513K
描述
Ultracompact, 3 A Thermoelectric Cooler (TEC) Controller

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ADN8834MB-EVALZ 数据手册

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LT8722  
Ultracompact 4A, 15V,  
Full Bridge Driver with SPI  
FEATURES  
DESCRIPTION  
n
25-Bit Digital Output Voltage Control  
The LT®8722 is a high performance, high efficiency,  
monolithic full bridge DC/DC converter. One side of the  
full bridge is driven by a pulse width modulation (PWM)  
buck power stage, while the other side of the full bridge  
is driven by a linear power stage. The LT8722 can deliver  
up to 54W1 of power to its load while only requiring  
a single inductor. An integrated 25-bit digital-to-analog  
converter (DAC) is used to control the LT8722 output  
voltage. Two additional 9-bit DACs control the positive and  
negative output current limits. An analog output telemetry  
pin can be used to monitor SPI selectable parameters  
n
Wide Input Voltage Range: 3.1V to 15V  
n
4A Output Current  
1
n
High Output Power: Up to 54W  
High Efficiency at High Frequency  
n
n
92.6% Efficiency at 4A, 15V , f = 3MHz  
IN SW  
n
SPI Interface Allows User to:  
n
Set Output Regulation Voltage  
n
Set Output Current Limits  
n
Check Device Status  
n
Enable/Disable Output  
n
Integrated 4A Power Switches  
such as V , V , I  
or the LT8722 junction tempera-  
IN OUT OUT  
Silent Switcher® Architecture  
ture. The serial peripheral interface (SPI) can be used to  
configure and control the LT8722 allowing for flexibility  
to set the desired output voltage, output current limits,  
voltage limits, switching frequency and control ON/OFF  
behavior. The SPI operates at up to 10MHz allowing for  
fast readback and control. The LT8722 operates from a  
single 3.1V to 15V supply. Silent Switcher techniques are  
used to minimize EMI/EMC emissions while delivering  
high efficiency at high switching frequencies. The LT8722  
is available in a 3mm × 3mm LQFN package.  
n
n
Analog Output for Diagnostics/Telemetry  
n
Adjustable and Synchronizable: 500kHz to 3MHz  
n
Small 3mm × 3mm 18-Lead LQFN  
APPLICATIONS  
n
Driving a Thermo Electric Cooler (TEC) with Fine Control  
n
Transmit Optical Sub-Assembly (TOSA) Cooling  
n
Erbium Doped Fiber Amplifier (EDFA) Temperature  
Regulation  
Photonic Integrated Circuit (PIC) Cooling  
LiDAR Mirror Control  
Motor Control  
n
1
V
TEC  
= 13.5V/ 4A with V = 15V, f = 1MHz  
IN SW  
n
All registered trademarks and trademarks are the property of their respective owners.  
n
TYPICAL APPLICATION  
Electrical Efficiency in  
Cooling Configuration  
13.5V/ 4A TEC Driver  
95  
V
IN  
LDR  
V
IN  
3.1V TO 15V  
+
4.7μF  
0.1μF  
150nF  
80  
65  
50  
35  
20  
5
V
TEC LOAD  
0.1μF  
OUT  
V
BST  
IN  
4.7μF  
0.1μF  
–
1μH  
SCK  
MOSI  
MISO  
CS  
SW  
FROM SPI  
MASTER  
LT8722  
SFB  
1μF  
V
DDIO  
V
EN  
SWEN  
SYNC  
A
OUT  
TO ADC  
DDIO  
2.7V TO 6V  
0.1μF  
f
= 3MHz  
SW  
IN  
V
CC  
V
= 15V  
1μF  
R
= 2.5Ω  
LOAD  
GND  
8722 TA01a  
0
1
2
3
4
LOAD CURRENT (A)  
8722 TA01b  
Rev. 0  
1
Document Feedback  
For more information www.analog.com  
1234567...30

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