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參數(shù)資料
| 型號： | L6924D013TR |
| 廠商： | 意法半導體 |
| 英文描述： | Battery charger system with integrated power switch for Li-ION/Li-POLYMER |
| 中文描述： | 電池為鋰聚合物集成電源開關(guān)，充電系統(tǒng) |
| 文件頁數(shù)： | 28/38頁 |
| 文件大小： | 1350K |
| 代理商： | L6924D013TR |
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Application information: monitoring and protection
L6924D
28/38
If a PTC connected to GND is used, the selection is the same as above, the only difference is
when the battery temperature increases, the voltage on the TH pin increases, and vice versa.
For applications that do not need a monitor of the battery temperature, the NTC can be
replaced with a simple resistor whose value is one half of the pull-up resistor R
UP
.
In this case, the voltage at the TH pin is always inside the voltage window, and the charge is
always enabled.
8.2
Battery absence detection
This feature provides a battery absent detection scheme to detect the removal or the insertion
of the battery. If the battery is removed, the charge current falls below the I
ENDTH
. At the end of
de-glitch time, a detection current I
DETECT
, equal to 1mA, is sunk from the output for a time of
T
DETECT
. The device checks the voltage at the output. If it is below the V
PRETH
, a current equal
to I
DETECT
is injected in the output capacitor for a T
DETECT
, and it is checked to see if the
voltage on the output goes higher than VABS (the value is V
OPRGTH
-50mV). If the battery
voltage changes from V
PRETH
to V
ABS
and vice versa in a T
DETECT
time, it means that no
battery is connected to the charger. The T
DETECT
is expressed by::
T
T
Figure 22. Battery absent detection flow chart
3
10
54
×
=
MAXCH
DETECT
Eq: 9-13
BATTERY
ABSENT
Detect Low Absent
V
BAT
>
V
PRETH
FAST CHARGE
Detect High Absent
V
BAT
>
V
RCH
PRE CHARGE
NO
YES
YES
NO
DETECT LOW ABSENT
= a I
SINK
is sunk for a T
DET
from the battery
DETECT HIGH ABSENT
= a I
INJ
is injected for a T
DET
in the battery
T
DET
= 100ms (Typ.)
I
SINK
=
I
INJ
= 1mA (Typ.)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| L6924U | 功能描述:電池管理 USB Battery Charger System w/integra 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 |
| L6924U013TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:USB compatible battery charger system with integrated power switch for Li-Ion/Li-Polymer |
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| L6925 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
| L6925013TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
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