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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)： | 4/38頁 |
| 文件大?。?/td> | 1454K |
| 代理商： | L6924D013TR |
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Operation description
L6924D
12/38
Doc ID 11908 Rev 9
When the VPRE pin is not used to program the Pre-Charge voltage threshold, it has two
different functions:
●
If the voltage across VPRE pin is lower than 0.8 V, when I < IENDTH, the end of charge is
notified by the status pin, but the charging process is not disabled. The charge process
ends when the maximum charging time expires.
●
If the voltage at VPRE pin false under 0.5 V the timer is reset on the falling edge.
Battery disconnection control is provided thanks to the differentiated sensing and forcing
output pins. A small current is sunk and forced through VOUT. If VOSNS doesn’t detect the
battery, the IC goes into a standby mode.
Figure 5 shows the real charging profile of a Li-Ion battery, with a fast charge current of 450
mA (RPRG = 26 kΩ),
Figure 5.
Li-Ion charging profile
6.1
Linear mode
When operating in linear mode, the device works in a way similar to a linear regulator with a
constant current limit protection.
It charges the battery in three phases:
●
Pre-charging current (“Pre-Charge” phase).
●
Constant current (“Fast-Charge” phase).
●
Constant voltage (“Voltage Regulation” phase).
VADP is the output voltage of the upstream AC-DC adapter that is, in turn, the input voltage
of the L6924D. If the battery voltage is lower than a set pre-charge voltage (VPRETH), the
pre-charge phase takes place. The battery is pre-charged with a low current IPRE
When the battery voltage goes higher than VPRETH, the battery is charged with the fast
Finally, when the battery voltage is close to the regulated output voltage VOPRGTH (4.1 V or
4.2 V), the voltage regulation phase takes place and the charging current is reduced. The
Charging profile
0.00 0
0.05 0
0.10 0
0.15 0
0.20 0
0.25 0
0.30 0
0.35 0
0.40 0
0.45 0
0.50 0
0
200
400
600
8 00
1000
1 200
Charging tim e (sec)
Ic
h
g
(
A
)
0.00 0
0.50 0
1.00 0
1.50 0
2.00 0
2.50 0
3.00 0
3.50 0
4.00 0
4.50 0
Vb
at
t(V
)
Ichg
Vb att
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6926D | 1.4 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| L6926Q1TR | 1.65 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PDSO8 |
| L6926Q1 | 1.65 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PDSO8 |
| L6928D | 1.65 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO8 |
| L6928TR | 1.65 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO8 |
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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