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參數(shù)資料
| 型號： | L6924D013TR |
| 廠商： | 意法半導(dǎo)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)： | 30/38頁 |
| 文件大小： | 1350K |
| 代理商： | L6924D013TR |
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Additional applications information
L6924D
30/38
9
Additional applications information
9.1
Selecting input capacitor
In most applications, a 1μF ceramic capacitor, placed close to the V
IN
and V
INSN
pins can be
used to filter the high frequency noise.
9.1.1
Selecting output capacitor
Typically, 1μF ceramic capacitor placed close to the V
OUT
and V
OUTSN
pin is enough to keep
voltage control loop stable
. This ensures proper operation of battery absent detection in
removable battery pack applications.
9.2
Layout guidelines and demoboard description
The thermal loop keeps the device at a constant temperature of approximately 120°C which in
turn, reduces I
CHG
. However, in order to maximize the current capability, it is important to
ensure a good thermal path. Therefore, the exposed pad must be properly soldered to the
board and connected to the other layer through thermal vias. The recommended copper
thickness of the layers is 70
μ
m or more.
The exposed pad must be electrically connected to GND.
Figure 24
shows the thermal image of
the board with the power dissipation of 1W. In this instance, the temperature of the case is
89°C, but the junction temperature of the device is given by the following formula:
Where the R
TH J-A
of the device mounted on board is 75°C/W, the power dissipated is 1W, and
the ambient temperature is 25°C.
In this case the junction temperature is:
AMB
DISS
P
A
THJ
J
T
R
T
+
×
=
Eq: 10-1
C
T
J
o
100
25
1
75
=
+
×
=
Eq: 10-2
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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 |
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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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