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| 型号： | MIC79110YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 13/15页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATT LI-ON ADJ 10MLF |
| 标准包装： | 1 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.5 V ~ 16 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘，10-MLF? |
| 供应商设备封装： | 10-MLF?（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1081 (CN2011-ZH PDF) |
| 其它名称： | 576-1320-6 |
Micrel, Inc.
Figure 4. Auto Top-Off Charger Application
Figure 5. Charging Description
1. SD not held low by active high DEOC because
DEOC Comparator’s inputs do not common-mode to
ground. Divider holds SD low so part can start.
2. SD held low by divider.
3. SD held low by active high DEOC.
4. Divider voltage above SD threshold and DEOC open.
5. Divider voltage drops below SD threshold and
MIC79110
Figure 6. Top-Off Charger with Internal Reset ?
Application Circuit
This circuit is similar to the auto top-off charger circuit
mentioned above except that the DEOC pin is externally
triggered to restart the charging cycle. It still uses the
same resistor divider to set the minimum battery voltage
before the lithium-ion needs to be recharged.
Figure 7. Auto-Shutdown using Shutdown Pin
The shutdown pin on the MIC79110 can be used to
automatically shutdown the battery charger when the
input voltage rises above a safe operating voltage. To
keep the part from heating up and entering thermal
shutdown, we can connect the shutdown pin to VIN using
a resistor divider. Use Equation 3 to setup the maximum
VIN:
charging begins again.
VIN ( MAX )
V SD
=
R1
R 2
+ 1
Eq. 3
The MIC79110 can be connected to a wall wart with a
rectified DC voltage and protected from over voltages at
the input.
May 21, 2013
13
052113-2.0 (while in progress)
Revision 2.0 (final document)
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