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，充電系統(tǒng)
文件頁數(shù)： 18/38頁
文件大?。?/td> 1350K
代理商： L6924D013TR
Applications information: charging process
L6924D
18/38
7.2
Pre-charge current
The L6924D allows pre-charging the battery with a low current when the battery voltage is
lower than a specified threshold (V
PRETH
). The Pre-charge current has a default value equal to
10% of the fast-charge current (see
Chapter 7.2: Pre-charge current on page 18
). However it
can be adjusted by connecting a resistor from the I
PRE
pin to GND or V
REF
Figure 10
. When the
resistor is connected from I
PRE
pin and GND, the current is higher than the default value. The
R
PRE
value is given by:
V
R
Figure 10. I
PRE
pin connection
When R
PRE
is connected to V
REF
, the current is lower than the default value. V
REF
is the
external reference equal to 1.8V, V
BG
is the internal reference equal to 1.23V and K
PRE
is a
constant equal to 950.
Figure 11
The relationship is shown in the equation 8.2:
Figure 11. I
PRE
pin connection
PRG
BG
PRE
PRECH
K
BG
PRE
R
V
I
=
Eq: 8-1
L6924D
I
PRE
PRE
PRECH
K
PRG
BG
BG
REF
PRE
I
R
V
V
V
R
=
Eq: 8-2
V
REF
L6924D
I
PRE
相關PDF資料
PDF描述
L6925 HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925013TR HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925D HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6926013TR High efficiency monolithic synchronous step down regulator
L6926D1 High efficiency monolithic synchronous step down regulator
相關代理商/技術參數(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
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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