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參數(shù)資料
| 型號： | LTC4055EUF#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | USB Power Controller and Li-Ion Linear Charger; Package: QFN; No of Pins: 16; Temperature Range: -40°C to +125°C |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | 4 X 4 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WGGC, QFN-16 |
| 文件頁數(shù)： | 15/24頁 |
| 文件大?。?/td> | 292K |
| 代理商： | LTC4055EUF#PBF |
LTC4055/LTC4055-1
22
4055fb
TYPICAL APPLICATIONS
USB Hosting Application: The LTC4055/LTC4055-1’s
IN1 and IN2 are Set Hi-Z by Pulling the SUSP Pin
Above 1.2V
In applications where the power is required to go back
out on to the USB VBUS the LTC4055/LTC4055-1 can be
congured to turn off its input power path, IN1 and IN2.
Forcing the SUSP input pin above 1.2V does this. Figure 6
shows the application circuit. The wall adapter or the battery
can still provide power to OUT, which in turn can provide
power to VBUS when commanded from the USB controller.
The ability to charge the battery is enabled when the wall
adapter is present.
+
IN1
IN2
WALL
SUSP
VNTC
NTC
OUT
Li-Ion
CELL
500mA/100mA SELECT
SHUTDOWN
10μF
1μF
TIMER PROG
LTC4055
CLPROG
GND
4055 F06
TO LDOs,
REGs, ETC
BAT
CHRG
ACPR
HPWR
SHDN
CTIMER
0.1μF
RPROG
100k
5V (NOM)
FROM USB
CABLE VBUS
5V WALL
ADAPTER INPUT
RCLPROG
105k
R1
34.8k
R2
10k
USB
CONTROLLER
R3
100k
NTC
100k
DC/DC
CONVERTER
EN
VIN
VOUT
Figure 6. USB Hosting Application
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