参数资料
| 型号： | AD7280AWBSTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/48页 |
| 文件大小： | 0K |
| 描述： | IC BATT MON LI-ION AUTO 48LQFP |
| 标准包装： | 1 |
| 功能： | 电池监控器，过压/欠压保护 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 8 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： | 托盘 |
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AD7280A
TYPICAL CONNECTION DIAGRAMS
0.1μF
10μF
10k ?
10k ?
10k ?
10k ?
VIN6
CB6
VIN5
V DD
MASTER
V REG
DV CC
AV CC
1μF
0.1μF
0.1μF
10k ?
CB5
V DRIVE
10k ?
VIN4
V REF
1μF
10k ?
10k ?
10k ?
10k ?
10k ?
10k ?
10k ?
10k ?
CB4
VIN3
CB3
VIN2
CB2
VIN1
CB1
VIN0
AD7280A
V SS
C REF
ALERT
CNVST
PD
SDO
SCLK
SDI
CS
0.1μF
OPTIONAL INTERFACE PINS
DSP/MICRO-
PROCESSOR
4-WIRE SPI INTERFACE
Figure 28. AD7280A Configuration Diagram for Six Battery Cells
The AD7280A can be used to monitor four, five, or six battery
cells connected in series. A typical configuration for a six-cell
battery monitoring application is shown in Figure 28. However,
lithium ion battery applications require a significant number of
shows the recommended configuration of a chain of AD7280As
monitoring a larger battery stack. The daisy-chain interface of the
AD7280A allows each individual AD7280A to communicate with
the AD7280A immediately above and below it. The daisy-chain
interface allows the AD7280As to be electrically connected to
the battery management chip without the need for individual
isolation devices between each AD7280A.
As shown in Figure 29, it is recommended that a Zener diode be
placed across the supplies of each AD7280A. This prevents an
overvoltage across the supplies of each AD7280A during the
initial connection of the daisy chain of AD7280As to the battery
stack. A voltage rating of 30 V is suggested for this Zener diode,
but lower values can also be used to suit the application.
The 10 kΩ resistor in series with the inputs combined with a
100 nF capacitor across the adjacent differential inputs acts as
a low-pass filter. The 10 kΩ resistors provide protection for the
analog inputs in the event of an overvoltage or undervoltage on
those inputs, for example, if any of the cell voltage inputs is
incorrectly shorted to V DD or V SS . The resistors also provide
protection during the initial connection of the daisy chain of
AD7280As to the battery stack. For more information about the
daisy-chain interface, see the Daisy-Chain Interface section.
In an application that includes a safety mechanism designed to
open circuit the battery stack, additional isolation is required
between the AD7280A above the break point and the battery
management chip.
A suggested configuration for the external cell balancing circuit
is shown in Figure 28. This configuration also includes 10 kΩ
resistors in series with the cell balance outputs. These resistors
provide protection for the cell balance outputs in the event of
an overvoltage or undervoltage on those inputs. See the Cell
Rev. 0 | Page 17 of 48
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7280AWBSTZ-RL | 功能描述:IC BATT MON LI-ION AUTO 48LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| AD7280BSTZ | 制造商:Analog Devices 功能描述: |
| AD7280BSTZ-RL | 制造商:Analog Devices 功能描述: |
| AD7280BSTZ-U6 | 制造商:Analog Devices 功能描述: |
| AD7280S-OB | 制造商:Sony Nec Optiarc America 功能描述:24X DVDRW SATA (BLACK) - Bulk |
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