參數(shù)資料
型號(hào)： LTC4270AIUKG#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC52
封裝： 8 X 7 MM, LEAD FREE, PLASTIC, QFN-52
文件頁數(shù)： 28/32頁
文件大?。?/td> 344K
代理商： LTC4270AIUKG#TRPBF
LTC4270/LTC4271
5
42701fa
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. AGND – VEE = 54V and VDD – DGND = 3.3V unless otherwise noted.
(Notes 3 & 4)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCUT
Overcurrent Sense Voltage
VSENSEn – VEE,
hpen = 0Fh, cutn = D4h
hpen = 0Fh, cutn = E2h (Note 12)
l
89
152
94
159
99
168
mV
Overcurrent Sense in AUTO Pin
Mode
Class 0, Class 3
Class 1
Class 2
Class 4
l
89
26
49
152
94
28
52
159
99
30
55
168
mV
VLIM
Active Current Limit in 802.3af
Compliant Mode
VSENSEn – VEE, hpen = 0Fh, limn = 80h, (AGND–VEE) = 55V
VEE < VOUT < AGND – 29V
AGND – VOUT = 0V (Note 12)
l
102
25
106
112
50
mV
Active Current Limit in High Power
Mode
hpen = 0Fh, limn = C0h, AGND–VEE = 55V
VOUT – VEE = 0 – 10V
VEE + 23V < VOUT < AGND – 29V
AGND – VOUT = 0V (Note 12)
l
204
102
25
212
106
225
115
50
mV
Active Current Limit in AUTO Pin
Mode
VEE < VOUT < AGND – 10V, AGND–VEE = 55V
Class 0 to Class 3
Class 4
l
102
204
106
212
112
225
mV
VMIN
DC Disconnect Sense Voltage
VSENSE – VEE, rdis Bit = 0
VSENSE – VEE, rdis Bit = 1 (Note 12)
l
2.6
1.3
3.8
1.9
4.9
2.45
mV
VSC
Short-Circuit Sense
VSENSEn – VEE – VLIM (Note 12)
rdis Bit = 0
rdis bit = 1
l
125
70
200
100
255
125
mV
Port Current Readback
Resolution
No Missing Codes, Reported as 14-Bits
12
Bits
LSB Weight
VSENSEn – VEE
30.518
μV/LSB
Conversion Period
25.1
ms/
Convert
Port Voltage Readback
Resolution
No Missing Codes, Reported as 14-Bits
12
Bits
LSB Weight
VSENSEn – VEE
5.8350
mV/LSB
LTC4270 Die Temperature
Die Temperature Offset
Temperature Register = 00h (Note 7)
–40
°C
Die Temperature LSB Weight
(Note 7)
0.7
°C/LSB
Digital Interface
VILD
Digital Input Low Voltage
ADn, RESET, MSD, GPn, AUTO, MID (Note 6)
l
0.8
V
I2C Input Low Voltage
SCL, SDAIN (Note 6)
l
1.0
V
VIHD
Digital Input High Voltage
(Note 6)
l
2.2
V
Digital Output Voltage Low
ISDAOUT = 3mA, IINT = 3mA
ISDAOUT = 5mA, IINT = 5mA
l
0.4
0.7
V
Internal Pull Up to VDD
ADn, RESET, MSD, GPn
l
50
kΩ
Internal Pull Down To DGND
AUTO, MID
l
50
kΩ
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4270BIUKG#PBF 制造商:Linear Technology 功能描述:POE Controller 25.5W 52-Pin QFN EP 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:IC POE LTPOE 12-PORT PSE 52-QFN 制造商:Linear Technology 功能描述:IC PSE CONTROLLER 3.3V QFN-52 制造商:Linear Technology 功能描述:PSE CNTRL 12 PORT 25.5W 1M 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-52; Input Voltage:3.3V; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:52; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:52-QFN ;RoHS Compliant: Yes
LTC4270BIUKG#PBF 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-52
LTC4270BIUKG#TRPBF 制造商:Linear Technology 功能描述:POE Controller 25.5W 52-Pin QFN EP 制造商:Linear Technology 功能描述:PSE CONTROLLER, 12PORT, 57V, QFN-52; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:52; Duty Cycle (%):6.3%; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C ;RoHS Compliant: Yes
LTC4270CIUKG#PBF 制造商:Linear Technology 功能描述:POE Controller 13W 52-Pin QFN EP 制造商:Linear Technology 功能描述:IC POE LTPOE 12-PORT PSE 52-QFN 制造商:Linear Technology 功能描述:PSE CNTRL 12 PORT 13W 1MHZ 制造商:Linear Technology 功能描述:IC PSE CONTROLLER 3.3V QFN-52 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-52; Input Voltage:3.3V; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:52; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:52-QFN ;RoHS Compliant: Yes
LTC4270CIUKG#PBF 制造商:Linear Technology 功能描述:IC PSE CONTROLLER 3.3V QFN-52 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-52
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