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AOZ9004BI-04 参数 Datasheet PDF下载

AOZ9004BI-04图片预览
型号: AOZ9004BI-04
PDF下载: 下载PDF文件 查看货源
内容描述: 单节电池保护IC ,内置MOSFET [Single-Cell Battery Protection IC with Integrated MOSFET]
分类和应用: 电池
文件页数/大小: 17 页 / 551 K
品牌: AOS [ ALPHA & OMEGA SEMICONDUCTORS ]
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AOZ9004B  
When a battery is in the normal status, and the discharge  
current becomes abnormally higher (EB+ pin and EB- pin  
shorted), and thus the VM pin voltage is equal or higher  
Battery Charging Function “Unavailable”  
This function inhibits recharging when a battery that is  
internally short-circuited (0V battery) is connected. When  
the battery voltage is the 0V battery charge inhibition  
than load short-circuiting detection voltage (V  
) for  
SHORT  
load short-circuiting detection delay time (t  
), the IC  
SHORT  
battery voltage (V  
) or lower, the charging control  
0INH  
turns off the discharge control MOSFET and stops  
discharging. This status is the load shorting-circuiting  
status. In the load shorting-circuiting status, the VM pin  
and VSS pin are shorted by the resistor between VM pin  
MOSFET gate is fixed to the EB- pin voltage to inhibit  
charging. When the battery voltage is the 0V battery  
charge inhibition battery voltage (V  
charging can be performed.  
) or higher,  
0INH  
and VSS pin (R  
) in the IC. When the short-circuiting  
VMS  
condition is released, the VM pin returns to the VSS  
potential. The resistance (R ) between the VM pin and  
Calculation of Current Limit  
VMD  
VDD pin is not connected in the load shorting-  
circuiting status.  
The charge and discharge current limit is determined by  
the charge and discharge over-current threshold voltages  
(V  
and V  
), and the total resistance of the internal  
DIOV  
CIOV  
Charge Over-Current Status  
MOSFET (R ). Use the following equations to deter-  
SS  
When a battery in the normal status, and the charge cur-  
rent is higher than the specified value and the status lasts  
mine the maximum and minimum current limits:  
for the charge over-current detection delay time (t  
),  
CIOV  
the charge control MOSFET is turned off and charging is  
stopped. This status is the charge over-current status.  
This IC will be restored to the normal status from the  
charge over-current status when, the voltage at the VM  
pin returns to charge over-current detection voltage  
VDIOV _ MAX  
VDIOV _ MIN  
IDIOV _ MAX  
ICIOV _ MAX  
=
=
; IDIOV _ MIN =  
RSS _ MIN  
VCIOV _ MAX  
RSS _ MAX  
VCIOV _ MIN  
; ICIOV _ MIN  
=
RSS _ MIN  
RSS _ MAX  
(V  
) or higher by removing the charger. The charge  
CIOV  
over-current detection function does not work in the over-  
discharge status. The resistance (R ) between the VM  
VMD  
pin and VDD pin, and the resistance (R  
) between the  
VMS  
VM pin and VSS pin are not connected in the charge  
over-current status.  
0V Battery Charging Function “Available”  
This function is used to recharge a connected battery  
whose voltage is 0V due to self-discharge. When the 0V  
battery charge starting charger voltage (V  
) or a  
0CHA  
higher voltage is applied between the EB+ and EB- pins  
by connecting a charger, the charging control MOSFET  
gate is fixed to the VDD pin voltage.  
When the voltage between the gate and source of the  
charging control MOSFET becomes equal to or higher  
than the turn-on voltage due to the charger voltage, the  
charging control MOSFET is turned on to start charging.  
At this time, the discharging control MOSFET is off and  
the charging current flows through the internal parasitic  
diode in the discharging control MOSFET. When the  
battery voltage becomes equal to or higher than over-  
discharge release voltage (V ), the AOZ9004B enters  
DU  
the normal status.  
Rev. 1.2 August 2008  
www.aosmd.com  
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