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參數(shù)資料
| 型號(hào)： | MAX5984DETI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 17/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CTRLR PD IEEE W/MOSFT 28TQFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | * |
4 ______________________________________________________________________________________
MAX5984
Single-Port, 40W, IEEE 802.3af/802.3at PSE
Controller with Integrated MOSFET
ELECTRICAL CHARACTERISTICS (continued)
(VAGND - VEE = 32V to 60V, TA = -40NC to +85NC, all voltages are referenced to VEE, unless otherwise noted. Typical values are at
VAGND - VEE = 54V, TA = +25NC. Currents are positive when entering the pin and negative otherwise.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Triangular Wave Peak-to-Peak
Voltage Amplitude
AMPTRW
Measured at DET, referred to AGND
3.85
4
4.2
V
OSC Pullup/Pulldown Currents
IOSC
Measured at OSC
26
32
39
F
A
ACD_EN Threshold
VACD_EN
VOSC - VEE > VACD_EN to activate AC
disconnect
270
330
380
mV
Load Disconnect Timer
tDISC
Time from IRSENSE < IDCTH (DC
disconnect active) or IDET < IACTH (AC
disconnect active) to gate shutdown
300
400
ms
DETECTION
Detection Probe Voltage
(First Phase)
VDPH1
VAGND - VDET during the first detection
phase
3.8
4
4.2
V
Detection Probe Voltage
(Second Phase)
VDPH2
VAGND - VDET during the second
detection phase
9
9.3
9.6
V
Current-Limit Protection
IDLIM
VDET = VAGND during detection, measure
current through DET
1.50
1.75
2.00
mA
Short-Circuit Threshold
VDCP
If VAGND - VOUT < VDCP after the first
detection phase, a short circuit to AGND
is detected
1
V
Open-Circuit Threshold
ID_OPEN
First point measurement current threshold
for open condition
8
F
A
Resistor Detection Window
RDOK
(Note 4)
19
26.5
kI
Resistor Rejection Window
RDBAD
Detection rejects lower values
15.5
kI
Detection rejects higher values
32
CLASSIFICATION
Classification Probe Voltage
VCL
VAGND - VDET during classification
16
20
V
Current-Limit Protection
IClLIM
VDET = VAGND, during classification
measure current through DET
65
80
mA
Classification Current
Thresholds
ICL
Classification
current
thresholds
between
classes
Class 0, Class 1
5.5
6.5
7.5
mA
Class 1, Class 2
13.0
14.5
16.0
Class 2, Class 3
21
23
25
Class 3, Class 4
31
33
35
Class 4 upper limit (Note 5)
45
48
51
Mark Event Voltage
VMARK
VAGND - VDET during mark event
8
10
V
Mark Event Current Limit
IMARK_LIM
VDET = VAGND, during mark event
measure current through DET
55
80
mA
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