參數(shù)資料
型號(hào)： L6924D013TR
廠(chǎng)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(kāi)關(guān)，充電系統(tǒng)
文件頁(yè)數(shù)： 14/38頁(yè)
文件大?。?/td> 1350K
代理商： L6924D013TR
Operation description
L6924D
14/38
The worst case in power dissipation occurs when the device starts the Fast-Charge Phase. In
fact, the battery voltage is at its minimum value. In this case, this is the maximum difference
between the adapter voltage and battery voltage, and the charge current is at its maximum
value.
The power dissipated is given by the following formula:
P
The higher the adapter voltage is, the higher the power dissipated. The maximum power
dissipated depends on the thermal impedance of the device mounted on board.
6.2
Quasi-pulse mode
The Quasi-Pulse Mode can be used when the system can rely on the current limit of the
upstream adapter to charge the battery. In this case, I
CHG
must be set higher than the current
limit of the adapter. In this mode, the L6924D charges the battery with the same three phases
as in Linear Mode, but the power dissipation is greatly reduced as shown in
Figure 7
.
Figure 7.
Typical charge curves in quasi pulse mode
CHG
BAT
ADP
DIS
I
V
V
(
×
=
)
Eq. 7-1
Adapter Voltage
Charge Current
Power dissipation
Battery Voltage
End
Charge
Voltage Regulation
Phase
Pre-Charge
Phase
Fast-Charge
Phase
I
LIM
Ilim x Rdson
I
PRETH
I
CHG
V
PRETH
V
OPRGTH
V
ADP
相關(guān)PDF資料
PDF描述
L6925 HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(lèi)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(chēng):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(lèi)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
L6925 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925013TR 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
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