參數(shù)資料
型號(hào)： L6924D013TR
廠商： STMICROELECTRONICS
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16
封裝： 3 X 3 MM, VFQFPN-16
文件頁(yè)數(shù)： 24/38頁(yè)
文件大小： 1454K
代理商： L6924D013TR
Additional applications information
L6924D
30/38
Doc ID 11908 Rev 9
9
Additional applications information
9.1
Selecting the input capacitor
In most applications, a 1 F ceramic capacitor, placed close to the VIN and VINSN pins can
be used to filter the high frequency noise.
9.2
Selecting the output capacitor
Typically, 1 F ceramic capacitor placed close to the VOUT and VOUTSN pin is enough to
keep voltage control loop stable. This ensures proper operation of battery absent detection
in removable battery pack applications.
9.3
Layout guidelines and demonstration board description
The thermal loop keeps the device at a constant temperature of approximately 120°C which
in turn, reduces ICHG. 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 m or more.
The exposed pad must be electrically connected to GND. Figure 25 shows the thermal
image of the board with the power dissipation of 1 W. In this instance, the temperature of the
case is 89°C, but the junction temperature of the device is given by the following equation:
Equation 27
Where the RTH J-A of the device mounted on board is 75 °C/W, the power dissipated is 1 W,
and the ambient temperature is 25 °C.
In this case the junction temperature is:
Equation 28
AMB
DISS
A
THJ
J
T
P
R
T
+
×
=
C
T
J
o
100
25
1
75
=
+
×
=
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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
L6924UTR 功能描述:電池管理 Battery Charger USB Compatible 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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