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LTC4020

更新时间： 2023-12-20 18:45:37
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
42页 1359K
描述
55V、降压-升压型多化学组成电池充电器

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中文翻译

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LTC4020 数据手册

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LTC4020  
55V Buck-Boost  
Multi-Chemistry Battery Charger  
FEATURES  
DESCRIPTION  
The LTC®4020 is a high voltage power manager providing  
PowerPath™ instant-on operation and high efficiency bat-  
tery charging over a wide voltage range. An onboard buck-  
boost DC/DC controller operates with battery and/or sys-  
tem voltages above, below, or equal to the input voltage.  
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Wide Voltage Range: 4.5V to 55V Input, Up to 55V  
Output (60V Absolute Maximums)  
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Synchronous Buck-Boost DC/DC Controller  
Li-Ion and Lead-Acid Charge Algorithms  
0.5% Float Voltage Accuracy  
5% Charge Current Accuracy  
The LTC4020 seamlessly manages power distribution  
between battery and converter outputs in response to  
load variations, battery charge requirements and input  
power supply limitations.  
Instant-On for Heavily Discharged Batteries  
Ideal Diode Controller Provides Low Loss  
PowerPath When Input Power Is Limited  
Input Voltage Regulation for High Impedance Input  
Supplies and Solar Panel Peak Power Operation  
Onboard Timer for Protection and Termination  
Bad Battery Detection with Auto-Reset  
NTC Input for Temperature Qualified Charging  
Binary Coded Open-Collector Status Pins  
Low Profile (0.75mm) 38-Pin 5mm × 7mm  
QFN Package  
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The LTC4020 battery charger can provide a constant-  
current/constant-voltage charge algorithm (CC/CV),  
constant-current charging (CC), or charging with an  
optimized 4-step, 3-stage lead-acid battery charge pro-  
file. Maximum converter and battery charge currents are  
resistor programmable.  
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The IC’s instant-on operation ensures system load power  
even with a fully discharged battery. Additional safety  
features include preconditioning for heavily discharged  
batteries and an integrated timer for termination  
and protection.  
APPLICATIONS  
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Portable Industrial and Medical Equipment  
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Solar-Powered Systems  
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Military Communications Equipment  
12V to 24V Embedded Automotive Systems  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. patents, including 7583113 and 8405362.  
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TYPICAL APPLICATION  
5V to 30V 6-Cell Lead-Acid Supply/Charger  
Buck-Boost DC/DC Converter Controller with PowerPath Battery Charger Accepts  
Inputs from 4.5V to 55V and Produces Output Voltages Up to 55V  
Maximum Power Efficiency vs VIN  
(Application Circuit on Page 37)  
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Rev. E  
1
Document Feedback  
For more information www.analog.com  
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