参数资料
| 型号： | AD8280WASTZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC LI-ION BATT MON 48LQFP |
| 标准包装： | 2,000 |
| 功能： | 电池监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 6 V ~ 30 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
| 配用： | AD8280-EVALZ-ND - BOARD EVAL FOR AD8280 |
Lithium Ion Battery Safety Monitor
FEATURES
Wide supply voltage range: 6.0 V to 30.0 V
Multiple inputs can monitor 3 to 6 cell voltages
and 2 temperatures
Adjustable threshold levels: overvoltage, undervoltage,
overtemperature
Alarm options: separate or shared alarms
Extended temperature range performance
?40°C ≤ T A ≤ +105°C
Can be daisy-chained
Internal reference
Powered from battery stack
LDO available to power isolator
Qualified for automotive applications
Extensive self-test feature aids in meeting ASIL/SIL
requirements
APPLICATIONS
Lithium ion battery backup monitor and threshold detection
Electric and hybrid electric vehicle
Industrial vehicle
Uninterruptible power supply
Wind and solar
GENERAL DESCRIPTION
The AD8280 is a hardware-only safety monitor for lithium ion
battery stacks. The part has inputs to monitor six battery cells
and two temperature sensors (either NTC or PTC thermistors).
The part is designed to be daisy-chained with other AD8280
devices to monitor a stack of significantly more than six cells
without the need for numerous isolators. Its output can be con-
figured for an independent or shared alarm state.
The AD8280 functions independently from a primary monitor
and contains its own reference and LDO, both of which are
powered completely from the battery cell stack. The reference, in
conjunction with external resistor dividers, is used to establish
trip points for the overvoltages and undervoltages. Each cell
channel contains programmable deglitching circuitry to prevent
alarms from transient input levels.
The AD8280 also has two digital pins that can be used to select
various combinations of inputs in the case where fewer than six
cells are to be monitored. Most important, it has a self-test feature,
making it suitable for high reliability applications, such as auto-
motive hybrid electric vehicles or higher voltage industrial usage,
such as uninterruptible power supplies. The AD8280 can function
over a temperature range of ?40°C to +105°C.
FUNCTIONAL BLOCK DIAGRAM
OT
VTOP LDO
LDOS REF
FB
UV
OV
AIINOV AIINUV AIINOT ENBO
TESTO
VTOPS
DGT0
VBOT2
VBOT2S
LDO
REF
LEVEL
SHIFTER
DGT1
DGT2
VBOT1
GND2
VBOT1S
VIN6
VIN5
LEVEL
SHIFTER
C6O
C6U
DE-
GLITCHING
DE-
GLITCHING
I/V
CONVERTER
SELF-
TEST
GENERATOR
GND1
VCC
VCCS
TOP
VIN4
VIN3
VIN2
BOT
SEL0
VIN1
C1O
DE-
GLITCHING
ALARM
LOGIC
SEL 1
VIN0
LEVEL
SHIFTER
C1U
DE-
GLITCHING
AVOUTOV
AVOUTUV
VT1
VT2
CT1
CT2
DE-
GLITCHING
DE-
GLITCHING
V/I
CONVERTER
AVOUTOT
NPTC
AD8280
ALRMSEL
OT
OT
AIOUTOV
AIOUTUV
AIOUTOT
ENBI
TESTI
Figure 1.
Rev. C
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 www.analog.com
Fax: 781.461.3113 ? 2010-2011 Analog Devices, Inc. All rights reserved.
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