參數(shù)資料
型號： L6924U
廠商： STMICROELECTRONICS
元件分類： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, QCC16
封裝： 3 X 3 MM, ROHS COMPLIANT, VFQFP-16
文件頁數(shù)： 13/38頁
文件大?。?/td> 598K
代理商： L6924U
Applications information: charging process
L6924U
20/38
Figure 12.
IUSB pin connection
Regardless of the operation mode (AC adapter or USB), during the fast-charge phase the
battery voltage increases until it reaches the programmed output voltage (4.2 V). A safety
timer is also present. If the Fast-charge phase does not finish within the programmed time
7.5
End-of-charge current
When the charge voltage approaches the battery regulated voltage (internally set to 4.2 V),
the voltage regulation phase takes place. The charge current starts to decrease until it goes
below a programmable termination current, IENDTH. This current can be selected by an
external resistor connected between the IEND pin and GND Figure 13, whose value can be
calculated as:
Equation 8
Figure 13.
IEND pin connection
Where KEND is 1050; and VMIN is 50 mV.
When the charge current goes below IENDTH, after a deglitch time, the status pins notify the
end of charge and the charge process ends.
This de-glitch time is expressed as:
Equation 9
where TMAXCH is the maximum charging time. (Chapter 7.8 on page 22)
×
=
ENDTH
END
MIN
END
I
K
V
R
E
220
MAXCH
DEGLITCH
T
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
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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
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L6925D 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Synchronous Step-Dwn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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