tDET Detection Ti" />
參數(shù)資料
型號(hào)： LTC4266IGW#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 26/30頁(yè)
文件大小： 0K
描述： IC CTRLR IEEE 802.3AT 36-SSOP
產(chǎn)品培訓(xùn)模塊： Power over Ethernet
標(biāo)準(zhǔn)包裝： 32
控制器類(lèi)型： 以太網(wǎng)控制器（IEEE 802.3）
接口： I²C，2 線串口
電源電壓： 3.3V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 36-BSOP（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 36-SSOP
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1338 (CN2011-ZH PDF)
LTC4266
5
4266fd
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Timing Characteristics
tDET
Detection Time
Beginning to End of Detection (Note 7)
l
270
290
310
ms
tDETDLY
Detection Delay
From PD Connected to Port to Detection
Complete (Note 7)
l
300
470
ms
tCLE1
First Class Event Duration
(Note 7)
l
11
12
13
ms
tME1
First Mark Event Duration
(Notes 7, 11)
l
6.8
8.6
10.3
ms
tCLE2
Second Class Event Duration
(Note 7)
l
11
12
13
ms
tME2
Second Mark Event Duration
(Note 7)
l
19
22
ms
tCLE3
Third Class Event Duration
CPORT = 0.6μF (Note 7)
l
0.1
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
Fault Delay
From ICUT Fault to Next Detect
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
tSTART1 = 0, tSTART0 = 0 (Notes 7, 12)
l
52
62.5
66
ms
tLIM
Maximum Current Limit Duration After Port
Start-Up
tCUT1 = 0, tCUT0 = 0, tLIM = 0h (Notes 7, 12)
l
52
62.5
66
ms
tCUT
Maximum Overcurrent Duration After Port
Start-Up
tCUT1 = 0, tCUT0 = 0 (Notes 7, 12)
l
52
62.5
66
ms
Maximum Overcurrent Duty Cycle
(Note 7)
l
5.8
6.3
6.7
%
tMPS
Maintain Power Signature (MPS) Pulse Width
Sensitivity
Current Pulse Width to Reset Disconnect
Timer (Notes 7, 8)
l
1.6
3.6
ms
tDIS
Maintain Power Signature (MPS) Dropout
Time
tconf [1:0] = 00b (Notes 5, 12)
l
320
350
380
ms
tMSD
Masked Shut Down Delay
(Note 7)
l
6.5
μs
tSHDN
Port Shut Down Delay
(Note 7)
l
6.5
μs
I2C Watchdog Timer Duration
l
1.5
2
3
s
Minimum Pulse Width for Masked Shut
Down
(Note 7)
l
3μs
Minimum Pulse Width for SHDN
(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, AGND = DGND, and VDD – DGND = 3.3V unless
otherwise noted. (Notes 3, 4)
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