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): 20/38頁
文件大小: 1350K
代理商: L6924D013TR
Applications information: charging process
L6924D
20/38
7.5
End-of-charge current
When the charge voltage approaches the selected value (4.1V or 4.2V), the Voltage Regulation
phase takes place. The charge current starts to decrease until it goes lower than a
programmable end value, I
ENDTH
, depending on an external resistor connected between the
I
END
pin and GND
Figure 14
. The formula that describes this relation as follows:
Figure 14. I
END
pin connection
Where K
END
is 1050; and V
MIN
is 50mV.
Typically, this current level is used to terminate the charge process. However, it is also possible
to disable the charge termination process based on this current level (
Chapter 7.9 on page 23
).
This pin is also used to monitor the charge current, because the current injected in R
END
is
proportional to I
CHG
. The voltage across R
END
can be used by a microcontroller to check the
charge status like a gas gauge.
×
=
ENDTH
END
MIN
END
I
K
V
R
Eq: 8-5
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