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參數(shù)資料
| 型號： | MIC79110 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Simple 1.2A Linear Li-Ion Battery Charger |
| 中文描述： | 簡單1.2A的線性鋰離子電池充電器 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 156K |
| 代理商： | MIC79110 |
July 2004
11
M9999-072004
MIC79110
Micrel
Auto Top Off Charger - Application Circuit
R
2
R
1
3M
1M
LI-ion Battery
200 ohms
2k
SD
VIN
RSET
VSENSE
VBAT
VIN
GND
REOC
DEOC
ACHG
V
IN
Lithium-Ion batteries will begin to lose their charge over time.
The MIC79110 can be configured to automatically recharge
the battery if the voltage drops below a certain voltage. This
minimum voltage is set by a resistor divider at the battery and
connected to the SD pin. When the battery voltage falls below
the minimum voltage, the SD pin is pulled low to start the
normal charging process.
4.2 V
V
Bat min
Deoc trip
Battery
charging
V
s
I
Battery
V
Battery
V
Bat min
=0.975V
(
R1
)
R
2
=1meg
R
1
=
(
Bat min
V
)
1
R
2
Self discharge
4
1
2
3
Vbat set (4.2V)
Vbat low set
by divider.
Vbat
SD Voltage
1 - SD not held low by active high D
EOC
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 D
EOC
open
5 - Divider voltage drops below SD threshold and
charging begins again.
Top-Off-Charger with Internal Reset - Application
Circuit
R
2
R
1
3meg
1meg
LI-ion Battery
200 ohms
2k
SD
VIN
RSET
VSENSE
VBAT
VIN
GND
REOC
DEOC
ACHG
V
IN
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.
Auto-Shutdown Using Shutdown Pin
GND
V
OUT
V
BAT
C
OUT
SD
V
IN
V
IN
R1
R2
C
IN
The shutdown pin on the MIC79110 can be used to automati-
cally 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 V
IN
using a resistor divider. Use the
following equation to setup the maximum V
IN
.
V
MAX
V
SD
R
R
1
IN
1
2
(
)=
+
The MIC79110 can be connected to a wall wart with a rectified
DC voltage and protected from over voltages at the input.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MIC79110_07 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Simple 1.2A Linear Li-Ion Battery Charger |
| MIC79110-4.2BML | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Simple 1.2A Linear Li-Ion Battery Charger |
| MIC79110-4.2BML TR | 功能描述:IC BATTERY CHARGER LI-ION 10-MLF RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| MIC79110-4.2YML TR | 功能描述:電池管理 1.2A Li-Ion Linear Battery Charger(Lead Free) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MIC79110-4.2YML-TR | 功能描述:IC BATTERY CHARGER LI-ION 10-MLF 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 電池化學:鋰離子 電池數(shù):1 Current Charging:- 可編程特性:- 故障保護:過流，超溫，反向電流 充電電流 - 最大值:1.2A Battery Pack Voltage:4.2V 電壓 -?供電（最高）:16V 接口:- 工作溫度:-40°C ~ 125°C （TJ） 封裝/外殼:10-VFDFN 裸露焊盤，10-MLF? 供應商器件封裝:10-MLF?（3x3） 標準包裝:1 |
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