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ADP3820ART-41 PDF预览

ADP3820ART-41

更新时间： 2024-11-22 22:05:47
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
8页 113K
描述
Lithium-Ion Battery Charger

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中文翻译

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ADP3820ART-41 数据手册

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Lithium-Ion  
a
Battery Charger  
ADP3820  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
؎1% Total Accuracy  
630 ␮A Typical Quiescent Current  
Shutdown Current: 1 ␮A (Typical)  
Stable with 10 ␮F Load Capacitor  
4.5 V to 15 V Input Operating Range  
Integrated Reverse Leakage Protection  
6-Lead SOT-23-6 and 8-Lead SO-8 Packages  
Programmable Charge Current  
–20؇C to +85؇C Ambient Temperature Range  
Internal Gate-to-Source Protective Clamp  
V
IN  
+
BIAS  
SD  
–
50mV  
IS  
V
REF  
GATE  
APPLICATIONS  
V
OUT  
Li-Ion Battery Chargers  
Desktop Computers  
Hand-Held Instruments  
Cellular Telephones  
Battery Operated Devices  
ADP3820  
GND  
GENERAL DESCRIPTION  
R
S
50m⍀  
The ADP3820 is a precision single cell Li-Ion battery charge  
controller that can be used with an external Power PMOS de-  
vice to form a two-chip, low cost, low dropout linear battery  
charger. It is available in two voltage options to accommodate  
Li-Ion batteries with coke or graphite anodes. The ADP3820’s  
high accuracy (±1%) low shutdown current (1 µA) and easy  
charge current programming make this device especially attrac-  
tive as a battery charge controller.  
I
= 1A  
O
NDP6020P  
V
+5V  
IN  
V
OUT  
+
C1  
10␮F  
Li-Ion  
BATTERY  
–
IS  
GATE  
R1  
10k⍀  
V
V
OUT  
IN  
ADP3820-xx  
22␮F  
SD  
GND  
Charge current can be set by an external resistor. For example,  
50 mΩ of resistance can be used to set the charge current to  
1 A. Additional features of this device include foldback current  
limit, overload recovery, and a gate-to-source voltage clamp to  
protect the external MOSFET. The proprietary circuit also  
minimizes the reverse leakage current from the battery if the  
input voltage of the charger is disconnected. This feature elimi-  
nates the need for an external serial blocking diode.  
Figure 1. Li-Ion Charger Application Circuit  
The ADP3820 operates with a wide input voltage range from  
4.5 V to 15 V. It is specified over the industrial temperature  
range of –20°C to +85°C and is available in the ultrasmall  
6-lead surface mount SOT-23-6 and 8-lead SOIC packages.  
REV. A  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  
12345678

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