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): 4/24頁
文件大?。?/td> 292K
代理商: LTC4055EUF#PBF
LTC4055/LTC4055-1
12
4055fb
OPERATION
Table 1. Operating Modes—PowerPath States Current Limited Input Power (IN1/IN2 to OUT)
WALL PRESENT SHUTDOWN
SUSPEND
VIN > 3.8V
VIN > (VOUT + 100mV)
VIN > (VBAT + 100mV)
CURRENT LIMIT ENABLED
Y
XXX
X
N
X
YXX
X
N
X
XYX
X
N
XX
X
N
X
N
X
XXX
N
X
N
X
XXX
X
N
NN
N
Y
Input Powered Charger (IN1/IN2 to BAT)
WALL PRESENT SHUTDOWN
SUSPEND
VIN > 4.35V
VIN > (VOUT + 100mV)
VIN > (VBAT + 100mV)
INPUT CHARGER ENABLED
Y
XXX
X
N
X
YXX
X
N
X
XYX
X
N
XX
X
N
X
N
X
XXX
N
X
N
X
XXX
X
N
NN
N
Y
Output Powered Charger (OUT to BAT)
WALL PRESENT SHUTDOWN
SUSPEND
VIN > 4.35V
VOUT > (VIN + 100mV)
VOUT > (VBAT + 100mV)
OUTPUT CHARGER ENABLED
N
XXX
X
N
X
YXX
X
N
XX
X
N
X
N
X
XXX
N
X
N
X
XXX
X
N
YN
X
Y
Ideal Diode (BAT to OUT)
WALL PRESENT SHUTDOWN
SUSPEND
VBAT > 2.8V
VBAT > VOUT
VIN
DIODE ENABLED
X
YXX
X
N
XX
X
N
X
N
X
XXX
N
X
N
XN
X
Y
X
Y
Table 2. Operating Modes—Pin Currents vs Programmed Currents (Charging from IN1/IN2)
PROGRAMMING
OUTPUT CURRENT
BATTERY CURRENT
INPUT CURRENT
ICL = ICHG
IOUT < ICL
IOUT = ICL = ICHG
IOUT > ICL
IBAT = ICHG – IOUT
IBAT = 0
IBAT = ICL – IOUT
IIN = IQ + ICL
ICHG < ICL
IOUT < (ICL – ICHG)
IOUT > (ICL – ICHG)
IOUT = ICL
IOUT > ICL
IBAT = ICHG
IBAT = ICL – IOUT
IBAT = 0
IBAT = ICL – IOUT
IIN = IQ + ICHG + IOUT
IIN = IQ + ICL
ICL < ICHG
IOUT < ICL
IOUT > ICL*
IBAT = ICL – IOUT
IIN = IQ + ICL
*Charge current shuts off when VOUT drops below VBAT, i.e., when IOUT exceeds ICL.
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