參數(shù)資料
型號(hào)： LTC4270BIUKG#PBF
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(yè)數(shù)： 29/32頁(yè)
文件大?。?/td> 344K
代理商： LTC4270BIUKG#PBF
LTC4270/LTC4271
6
42701fa
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
XIO
VOLX
XIO Digital Output Low
VXIOn – VEE, IXIOn = 5mA
l
0.7
V
VOHX
XIO Digital Output High
VXIOn – VEE, IXIOn = 100μA
l
3.5
V
XIO Digital Input Low Voltage
VXIOn – VEE
l
0.8
V
XIO Digital Input High Voltage
VXIOn – VEE
l
3.4
V
Internal Pull Up to CAP2
XIO0, XIO1
l
50
kΩ
PSE Timing Characteristics
tDET
Detection Time
Beginning To End of Detection (Note 7)
l
220
ms
tCLE
Class Event Duration
(Note 7)
l
12
ms
tCLEON
Class Event Turn On Duration
CPORT = 0.6μF (Note 7)
l
0.1
ms
tME
Mark Event Duration
(Note 7, Note 11)
l
8.6
ms
tMEL
Last Mark Event Duration
(Note 7, Note 11)
l
16
22
ms
tPON
Power On Delay in AUTO Pin Mode From End of Valid Detect to Application of Power to Port
(Note 7)
l
60
ms
Turn-On Rise Time
(AGND – VOUT): 10% to 90% of (AGND - VEE) CPORT =
0.15μF (Note 7)
l
15
24
μs
Turn-On Ramp Rate
CPORT = 0.15μF (Note 7)
l
10
V/μs
tTOCL
Turn-On Class Transition
CPORT = 0.15μF (Note 7)
l
0.1
ms
tED
Fault Delay
From ICUT or ILIM Fault to Next Detect
(Note 7)
l
1.0
1.1
s
Midspan Mode Detection Backoff
RPORT = 15.5kΩ (Note 7)
l
2.3
2.5
2.7
s
Power Removal Detection Delay
From Power Removal After tDIS to Next Detect (Note 7)
l
1.0
1.3
2.5
s
tSTART
Maximum Current Limit Duration
During Port Start-Up
(Note 7)
l
52
59
66
ms
tCUT
Maximum Overcurrent Duration
After Port Start-Up
(Note 7)
l
52
59
66
ms
Maximum Overcurrent Duty Cycle
(Note 7)
l
5.8
6.3
6.7
%
tLIM
Maximum Current Limit Duration
After Port Start-Up – tLIM Enabled
tLIM = 1 (Note 7, Note 12)
l
10
12
14
ms
Maximum Current Limit Duration
After Port Start-Up – tLIM as tCUT
tLIM = 0 (Note 7, Note 12)
l
52
59
66
ms
tMPS
Maintain Power Signature (MPS)
Pulse Width Sensitivity
Current Pulse Width to Reset Disconnect Timer (Note 7,
Note 8)
l
1.6
3.6
ms
tDIS
Maintain Power Signature (MPS)
Dropout Time
(Note 7, Note 5)
l
320
350
380
ms
tMSD
Masked Shut Down Delay
(Note 7)
6.5
μs
I2C Watchdog Timer Duration
(Note 7)
l
1.5
2
3
s
Minimum Pulse Width for Masked
Shut Down
(Note 7)
l
3μs
Minimum Pulse Width for RESET
(Note 7)
l
4.5
μs
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)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
LTC4270CIUKG#TRPBF 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: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
LTC4271 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single PoE/PoE/LTPoE PSE Controller
LTC4271IUF#PBF 制造商:Linear Technology 功能描述:POE Controller 90W 24-Pin QFN EP 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:IC POE 12-/8-PORT PSE 24-QFN 制造商:Linear Technology 功能描述:IC PSE CONTROLLER 3.3V QFN-24 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-24 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-24; Input Voltage:3.3V; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:24; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:24-QFN ;RoHS Compliant: Yes
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