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LT8710

更新时间： 2022-02-26 13:27:19
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
44页 646K
描述
Synchronous SEPIC/ Inverting/Boost Controller with Output Current Control

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中文翻译

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LT8710 数据手册

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LT8710  
Synchronous SEPIC/  
Inverting/Boost Controller with  
Output Current Control  
DescripTion  
FeaTures  
The LT®8710 is a synchronous PWM DC/DC controller  
with a rail-to-rail output current monitor and control. The  
LT8710isidealformanytypesofpowersupplytopologies  
and can be easily configured for boost, SEPIC, inverting,  
or flyback configurations.  
n
Wide Input Range: 4.5V to 80V  
n
Rail-to-Rail Output Current Monitor and Control  
n
Input Voltage Regulation for High Impedance Inputs  
n
C/10 or Power Good Indication Pin  
n
MODE Pin for Forced CCM or Pulse-Skipping  
Operation  
Switching Frequency Up to 750kHz  
TheLT8710’srail-to-railoutputcurrentmonitorandcontrol  
allows the part to be configured in current limited applica-  
tions such as battery charging. The FLAG pin can be used  
as a power good indication or C/10 indication allowing for  
accurate bulk and float battery voltages.  
n
n
Easily Configurable as a Boost, SEPIC, Inverting or  
Flyback Converter with Single Feedback Pin  
n
Can Be Synchronized to External Clock  
n
High Gain EN/FBIN Pin Accepts Slowly Varying Input  
The LT8710’s switching frequency range can be set be-  
tween 100kHz and 750kHz using an external resistor or  
synchronized to an external clock.  
Signals  
20-Lead TSSOP Package  
n
applicaTions  
The LT8710 also features innovative EN/FBIN pin cir-  
cuitry that allows for slowly varying input signals and  
an adjustable undervoltage lockout function. The pin is  
also used for input voltage regulation to avoid collapsing  
a high impedance input supply. Additional features such  
as frequency foldback and soft-start are integrated. The  
LT8710 is available in a 20-lead TSSOP package.  
n
High Power Local Power Supply  
n
Wide Input Voltage Range SEPIC/Inverting  
n
Lead Acid Battery Charger  
n
Automotive Engine Control Unit (ECU) Power  
n
Solar Panel Power Converter  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, Including 7579816.  
Typical applicaTion  
300kHz Inverter Generates –5V from a 4.5V to 25V Input  
Efficiency and Power Loss  
10µF ×2  
100  
90  
80  
70  
65  
50  
40  
30  
20  
8
7
6
5
4
3
2
1
0
2.2µH  
2.2µH  
V
–5V  
7A  
OUT  
V
IN  
4.5V TO 25V  
330µF  
+
499Ω  
1.5m  
100µF  
×2  
4m  
0.47µF  
BG  
CSN  
CSP TG  
V
IN  
ISN  
+
13.3k  
10k  
120µF  
ISP  
LT8710  
V
IN  
V
IN  
= 5V  
EN/FBIN  
MODE  
60.4k  
BIAS  
INTV  
= 12V  
CC  
2.2µF  
0
1
2
3
4
5
6
7
INTV  
2.2µF  
EE  
10µF  
×4  
LOAD CURRENT (A)  
INTV  
RT  
FBX  
8710 TA01b  
CC  
FLAG  
V
C
118k  
11.5k  
3.3nF  
SYNC GND  
IMON  
SS  
100pF  
47nF  
220nF  
8710 TA01a  
8710f  
1
For more information www.linear.com/LT8710  
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