參數(shù)資料
型號： ADP3808JCPZ-RL
廠商： ANALOG DEVICES INC
元件分類： 穩(wěn)壓器
英文描述： High Efficiency Switch Mode Li-Ion Battery Charger
中文描述： BATTERY CHARGE CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, QCC24
封裝： ROHS COMPLIANT, MO-220VGGD-2, LFCSP-24
文件頁數(shù)： 1/16頁
文件大小： 315K
代理商： ADP3808JCPZ-RL
High Efficiency Switch Mode
Li-Ion Battery Charger
ADP3808
FEATURES
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
Selectable 3-cell or 4-cell operation
Adjustable 4.0 V to 4.5 V per cell
High end-of-charge voltage accuracy
±0.4% @ 25°C
±0.6% @ 5°C to 55°C
±0.8% @ 0°C to 100°C
Programmable charge current, including trickle charge
Bootstrapped synchronous drive for external N-channel
MOSFETs
Programmable oscillator frequency
APPLICATIONS
Portable computers
Portable equipment
GENERAL DESCRIPTION
The ADP3808 is a complete Li-Ion battery charging controller
for 3- or 4-cell battery packs. The device combines accurate
final battery charge voltage control with constant current
control to simplify the implementation of constant-current,
constant-voltage (CCCV) chargers.
The final battery charge voltage is programmable between 4.0 V
to 4.5 V per cell, allowing the charging of various cell types. The
charge current is programmable over a wide range from trickle
charging to full charging. The system current sense amplifier
includes an ac adapter detection output to signal that the
adapter is connected. The bootstrapped synchronous driver
controls two N-channel MOSFET transistors for high efficiency
charging at a low system cost.
The ADP3808 is specified over the extended commercial
temperature range of 0°C to 100°C and is available in a 24-lead
LFCSP package.
FUNCTIONAL BLOCK DIAGRAM
10
5
12
11
9
23
1
2
3
24
19
20
21
17
16
15
14
18
LIMIT
LIMSET
ISYS
SYSM
SYSP
COMP
BATADJ
REFIN
BAT
CELLSEL
RT
AGND
EN
BST
DRVH
SW
DRVL
DRVREG
PGND
CSP
CSM
CSADJ
4
EXTPWR
1V
DRVREG
DRVREG
UVLO
AND BIAS
LOW-SIDE
DRIVE
REGULATOR
CHARGE
CURRENT
SETPOINT
REFERENCE
OSCILLATOR
3-/4-
CELL
IN
EN
DRVLSD
CONTROL
LOGIC
22
VCC
8
BATTERY
VOLTAGE
ADJUST
6
7
g
m
CMP
g
m
SYS+
18.25V
CMP
CMP
VTH
13
0
Figure 1.
相關PDF資料
PDF描述
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