參數(shù)資料
型號： ADP3802AR
廠商： ANALOG DEVICES INC
元件分類： 電源管理
英文描述： Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.50V) 8-SM8 -40 to 110
中文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封裝： SOIC-16
文件頁數(shù)： 1/20頁
文件大?。?/td> 256K
代理商： ADP3802AR
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.
a
ADP3801/ADP3802
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1998
High Frequency Switch Mode
Dual Li
-
I
on Battery Chargers
FUNCTIONAL BLOCK DIAGRAM
ADP3801/ADP3802
LDO +
REFERENCE
A/B
SELECT
MUX
DRV
VCC
CS+ CS–
A/B
PROG
ADJ
COMP
GND
SD
VL
RESET
ISET
BATB
BATA
EOC
SD
\UVLO
GATE
DRIVE
CURRENT
LOOP
AMP + EOC
COMPARATOR
PWM
FINAL BATTERY
VOLTAGE
PROGRAM
(4.2, 8.4, 12.6)
VOLTAGE
LOOP
AMP
BATTERY
VOLTAGE
ADJUST
6
10%
SHUTDOWN
UVLO
+
RESET
FEATURES
Stand-Alone Li
-I
on Battery Chargers
High End-of-Charge Voltage Accuracy
6
0.4% @ +25
8
C
6
0.75% @ –10
8
C to +70
8
C
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
Undervoltage Lockout
Drives External PMOS
6
10% Adjustable End-of-Charge Voltage
Charges NiCad, NiMH (with External
m
Controller)
PWM Oscillator Frequency:
ADP3801: 200 kHz
ADP3802: 500 kHz
APPLICATIONS
Fast Chargers
Universal Chargers
Cellular Phones
Portable Computers
Portable Instrumentation
Desktop Chargers
Personal Digital Assistants
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.
BATA
BATB
VCC DRV
EOC
CS–
CS+
ISET
BATA
ADJ
GND
RESET
V
IN
VL
ADP3801/ADP3802
SD
BATB
3.3V
40m
V
A/B
COMP
PROG
68
m
H
Figure 1. 4 Amp Dual Battery Charger
相關(guān)PDF資料
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