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ADP3801_15

更新时间： 2024-09-26 01:21:39
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
20页 259K
描述
High Frequency Switch Mode Dual Li-Ion Battery Chargers

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ADP3801_15 数据手册

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High Frequency Switch Mode  
Dual Li- on Battery Chargers  
ADP3801/ADP3802  
a
I
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Stand-Alone Li-Ion Battery Chargers  
High End-of-Charge Voltage Accuracy  
؎0.4% @ +25؇C  
VCC  
DRV  
EOC  
CS+  
CS–  
A/B  
؎0.75% @ –10؇C to +70؇C  
BATA  
BATB  
A/B  
SELECT  
MUX  
Intelligent End-of-Charge Output Signal  
Pin Programmable Cell Number Select  
On Chip 3.3 V LDO Regulator  
Programmable Charge Current with High Side Sense  
Softstart Charge Current  
CURRENT  
LOOP  
LDO +  
GATE  
VL  
REFERENCE DRIVE  
AMP + EOC  
COMPARATOR  
ISET  
SHUTDOWN  
PWM  
SD  
UVLO  
FINAL BATTERY  
VOLTAGE  
PROGRAM  
(4.2, 8.4, 12.6)  
+
PROG  
RESET  
RESET  
Undervoltage Lockout  
Drives External PMOS  
SD\UVLO  
؎10% Adjustable End-of-Charge Voltage  
Charges NiCad, NiMH (with External ␮Controller)  
PWM Oscillator Frequency:  
BATTERY  
VOLTAGE  
LOOP  
AMP  
VOLTAGE  
ADJUST  
؎10%  
ADP3801/ADP3802  
ADP3801: 200 kHz  
ADP3802: 500 kHz  
GND  
ADJ  
COMP  
APPLICATIONS  
Fast Chargers  
Universal Chargers  
Cellular Phones  
Portable Computers  
Portable Instrumentation  
Desktop Chargers  
Personal Digital Assistants  
68␮H  
40m⍀  
V
IN  
BATA  
BATB  
GENERAL DESCRIPTION  
The ADP3801 and ADP3802 are complete battery charging  
ICs. The devices combine a high accuracy final battery voltage  
control with a constant charge current control and an on-board  
Low Drop-Out Regulator (LDO). The accuracy of the final  
battery voltage control is guaranteed to ±0.75% to safely charge  
Li-Ion batteries. An internal multiplexer allows the alternate  
charging of two separate battery stacks. The final voltage is pin  
programmable to one of three Li-Ion options: 4.2 V (one Li-Ion  
cell), 8.4 V (two Li-Ion cells), or 12.6 V (three Li-Ion cells).  
Paired with an external microcontroller for charge termination,  
the ADP3801/ADP3802 works as a fast charger for NiCad/  
NiMH batteries or as a universal charger for all three battery  
chemistries. In addition, a pin is provided for changing the final  
battery voltage by up to ±10% to adjust for variations in battery  
chemistry from different Li-Ion manufacturers without loss of  
accuracy in the final battery voltage.  
VCC DRV  
VL  
CS+ CS–  
A/B  
BATA  
EOC  
3.3V  
BATB  
ADP3801/ADP3802  
SD  
ISET  
RESET  
PROG  
GND  
COMP  
ADJ  
Figure 1. 4 Amp Dual Battery Charger  
REV. 0  
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., 1998  
1234567...20

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