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XB5608A

器件型号:XB5608A
器件类别:电源/电源管理    电池保护芯片   
厂商:xysemi(赛芯微)
赛芯微电子有限公司(XySemi Inc)致力于依靠自主专利的功率器件结构及排他的半导体工艺为客户提供设计简洁,性能优良,成本低廉,集成度高的电源信息管理方案。
厂商官网:http://www.szxinna.com/agent.asp
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器件描述

锂电池保护

参数
产品属性属性值
属性:参数值
商品目录:电池保护芯片

XB5608A产品介绍

XB5608A
概述
单节锂离子/锂聚合物可充电电池组保护芯片
特性
•充电器反向连接保护
•电池反向连接保护
•集成等效 16mΩ
的先进的功率
MOSFET
•超薄封装:SOT23-5
•只有一个外部电容器
•过温保护
•过充电流保护
•2
段过流保护
-过放电流 1
-负½½短路电流
•充电器检测功½
•0V
电池充电功½
•延时时间内部设定
•高精度电压检测
•½静态耗电流
工½状
态:3.9μA 典型值. 过放模式
下:2.2μA 典型值.
•兼容 RoHS
和无铅标准·
XB5608A
产品 是单节锂离子/锂聚合物可
充 电电池组保护的高集成度解决方案。
XB5608A
包括了先进的功率
MOSFET,高
精 度的电压检测电路和延时电路。
XB5608A
½用一个超薄
SOT23-5
封装和
只 有一个外部器件,½电池的保护电路
空间 最小化。这½得该器件非常适合应
用于空 间限制得非常小的可充电电池组
应用。
XB5608A
具有过充,过放,过流,过温
及 短路等所有的电池所需保护功½,并
且工 ½时功耗非常½。
该芯片不仅仅是为手机而设计,也适用于
一切需要锂离子或锂聚合物可充电电池长
时间供电的各种信息产品的应用场合,如
智½手环、手表、蓝牙耳机等产品。
应用
单节锂离子电池
聚合物锂电池
图一、典型应用电路
-1-
REV0.5
XB5608A
订货信息
产品型号
XB5608A
封装
过充电压
[VCU] (V)
过充恢复电压
[VCL] (V)
过放电压
[VDL] (V)
过放恢复电压 过流检测电流
[IOV1] (A)
[VDR] (V)
3.0
9
丝印
5608AYW
(note)
SO
4.30
4.10
2.40
T
23-5
注意: “YW”是生产日期, “Y” 是年½, “W” 是周号
管脚图
图二、引脚配½
管脚描述
XB5608A
管脚号
1,2
3
4,5
管脚名称
GND
VDD
VM
接地端,接电池芯负极
IC
供电端
电池组的负端。内部
FET
开关连接到
GND
管脚描述
绝对最大额定值
(注意:
为保护器件,不允许超过以下最大额定值. 长时间工½在最大额定值条件下可½会½响产品的可靠性.)
参数
数值
单½
VDD
输入电压
VM
输入电压
工½环境温度
最大结温
储存温度
引脚温度
(
焊接,
10
秒)
-2-
-0.3 to 6
-6 to 10
-40 to 85
125
-55 to 150
300
V
V
°
C
°
C
°
C
°
C
REV0.5
XB5608A
环境温度
25°C
时的功耗
封装热限
(结温)
θJA
封装热阻
(结到环境)
θJC
ESD
0.4
250
130
2000
W
°
C/W
°
C/W
V
电气特性
除非特殊说明,所有指标均为
T=25°
条件下
C
参数
检测电压
标识
测试条件
最小值
典型值
最大值
单½
过充检测电压
过充恢复电压
4.25
V
CU
4.05
V
CL
2.3
4.30
4.10
2.4
3.0
4.35
4.15
V
V
2.5
V
2.9
3.1
V
过放检测电压
过放恢复电压
检测电流
V
DL
V
DR
过放电流
1
检测电流
负½½短路检测电流
电流功耗
*I
IOV1
*I
SHORT
V
DD
=3.6V
V
DD
=3.6V
9
45
A
A
正常工½功耗
关机功耗
VM
端电阻
I
OPE
I
PDN
V
DD
=3.6V
VM =0V
V
DD
=2.0V
VM pin
悬空
3.9
2.2
6
4
μ
A
μ
A
VM
VDD
间内部电阻
VM
GND
间内部电阻
FET
导通电阻
*R
VMD
*R
VMS
VDD=2.0V
VM pin
悬空
V
DD
=3.6V
VM=1.0V
320
k
k
25
FET
等效导通电阻
过温保护
*R
SS(ON)
V
DD
=3.6V
I
VM
=1.0A
16
m
过温保护温度
过温保护恢复温度
检测延时
*T
SHD+
*T
SHD-
120
100
o
C
-3-
REV0.5
XB5608A
过充检测延时
过放检测延时
过流检测延时
短路检测延时
注:*—该参数设计保证,成测不测
t
CU
t
DL
*t
IOV
*t
SHOR
T
130
40
V
DD
=3.6V
V
DD
=3.6V
8
200
200
60
mS
mS
mS
uS
Figure 3. Functional Block Diagram
FUNCTIONAL DESCRIPTION
The XB5608A monitors the voltage and
current of a battery and protects it from
being damaged due to overcharge voltage,
overdischarge voltage, overdischarge
current, and short circuit conditions by
disconnecting the battery from the load
or charger. These functions are required in
order to operate the battery cell within
specified limits.
The device requires only one external
capacitor. The MOSFET is integrated and
its R
SS(ON)
is as low as 16mΩ typical.
-4-
REV0.5
Normal operating mode
If no exception condition is detected,
charging and discharging can be carried
out freely. This condition is called the
normal operating mode.
Overcharge Condition
When the battery voltage becomes higher
than the overcharge detection voltage (V
CU
)
during charging under normal condition
and the state continues for the overcharge
detection delay time (t
CU
) or longer, the
XB5608A turns the charging control FET
XB5608A
off to stop charging. This condition is called
the overcharge condition. The overcharge
condition is released in the following two
cases:
1, When the battery voltage drops below
the overcharge release voltage (V
CL
), the
XB5608A turns the charging control FET
on and returns to the normal condition.
2, When a load is connected and
discharging starts, the XB5608A turns the
charging control FET on and returns to the
normal condition. The release mechanism
is as follows: the discharging current flows
through an internal parasitic diode of the
charging FET immediately after a load is
connected and discharging starts, and the
VM pin voltage increases about 0.7 V
(forward voltage of the diode) from the
GND pin voltage momentarily. The
XB5608A detects this voltage and releases
the overcharge condition. Consequently, in
the case that the battery voltage is equal to
or lower than the overcharge detection
voltage (V
CU
), the XB5608A returns to the
normal condition immediately, but in the
case the battery voltage is higher than the
overcharge detection voltage (V
CU
),the chip
does not return to the normal condition
until the battery voltage drops below the
overcharge detection voltage (V
CU
) even if
the load is connected. In addition, if the VM
pin voltage is equal to or lower than the
overcurrent 1 detection voltage when a
load is connected and discharging starts,
the chip does not return to the normal
condition.
Remark
If the battery is charged to a voltage higher
than the overcharge detection voltage (V
CU
) and
the battery voltage does not drops below the
overcharge detection voltage (V
CU
) even when a
heavy load, which causes an overcurrent, is
connected, the overcurrent 1 and overcurrent 2 do
not work until the battery voltage drops below the
overcharge detection voltage (V
CU
). Since an actual
battery has, however, an internal impedance of
several dozens of mΩ, and the battery voltage
drops immediately after a heavy load which causes
an overcurrent is connected, the overcurrent 1 and
-5-
REV0.5
overcurrent 2 work. Detection of load short-
circuiting works regardless of the battery voltage.
Overdischarge Condition
When the battery voltage drops below the
overdischarge detection voltage (V
DL
)
during discharging under normal condition
and it continues for the overdischarge
detection delay time (t
DL
) or longer, the
XB5608A turns the discharging control
FET off and stops discharging. This
condition is called overdischarge condition.
After the discharging control FET is turned
off, the VM pin is pulled up by the
R
VMD
resistor
between VM and VDD in XB5608A.
Meanwhile when VM is bigger than 1.5
V (typ.) (the load short-circuiting detection
voltage), the current of the chip is reduced
to the power-down current (
I
PDN
). This
condition is called power-down condition.
The VM and VDD pins are shorted by the
R
VMD
resistor in the IC under the
overdischarge and power-down conditions.
The power-down condition is released
when a charger is connected and the
potential difference between VM and VDD
becomes 1.3 V (typ.) or higher (load short-
circuiting detection voltage). At this time,
the FET is still off. When the battery
voltage becomes the overdischarge
detection voltage (V
DL
) or higher (see note),
the XB5608A turns the FET on and
changes to the normal condition from the
overdischarge condition.
Remark
If the VM pin voltage is no less than the
charger detection voltage (V
CHA
), when the battery
under overdischarge condition is connected to a
charger, the overdischarge condition is released
(the discharging control FET is turned on) as usual,
provided that the battery voltage reaches the
overdischarge release voltage (V
DU
) or higher.
Overcurrent Condition
When the discharging current becomes
equal to or higher than a specified value
(the VM pin voltage is equal to or higher
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