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
文件頁數(shù)： 10/38頁
文件大?。?/td> 1454K
代理商： L6924D013TR
Applications information: charging process
L6924D
18/38
Doc ID 11908 Rev 9
Equation 8
Figure 12.
VPRE pin connection
Where RVPRE is the resistor between VPRE and GND, and RPRG is the resistor used to set
the charge current (see Section 7.4: Fast charge current), and VPRETH is the selected
threshold.
A safety timer is also present. If the battery voltage doesn't rise over VPRETH, before this
time is expired, a fault is given (see Section 7.8: Maximum charging time). If at the beginning
of the charge process, the battery voltage is higher than the VPRETH, the Pre-Charge phase
is skipped.
7.4
Fast charge current
When the battery voltage reaches the Pre-charge voltage threshold (VPRETH), the L6924D
starts the Fast-charge Phase. In this phase, the device charges the battery with a constant
current, ICHG, programmable by an external resistor that sets the charge current with an
accuracy of 7% Figure 13. The equation used to select the RPRG as follows:
Equation 9
Figure 13.
IPRG pin connection
Where KPRG is a constant, equal to 9500.
During this phase, the battery voltage increases until it reaches the programmed output
voltage. A safety timer is also present. If this time expires, a fault is given (Section 7.8:
×
=
lt
PRETHDefau
PRETH
PRG
VPRE
V
R
VPRE
L6924D
R
PRE
VPRE
L6924D
R
PRE
×
=
CHG
PRG
BG
PRG
I
K
V
R
相關(guān)PDF資料
PDF描述
L6926D 1.4 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8
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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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