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參數(shù)資料
| 型號： | MAX5984DETI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/22頁 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PD IEEE W/MOSFT 28TQFN |
| 標準包裝： | 2,500 |
| 系列： | * |
_______________________________________________________________________________________ 5
MAX5984
Single-Port, 40W, IEEE 802.3af/802.3at PSE
Controller with Integrated MOSFET
Note 2: This device is production tested at TA = +25NC. Limits at TA = -40NC and TA = +85NC are guaranteed by design.
Note 3: If ILIM1 and ILIM2 are both unconnected, Class 5 detection is disabled. See the Class 5 PD Classification section and Table 3 for
details and settings.
Note 4: RDOK = (VOUT2 - VOUT1)/(IDET2 - IDET1). VOUT1, VOUT2, IDET2, and IDET1 represent the voltage at OUT and the current at
DET during phase 1 and 2 of the detection, respectively.
Note 5: If Class 5 is enabled, this is the classification current thresholds from Class 4 to Class 5.
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
DIGITAL INPUTS/OUTPUTS (Voltages referenced to VEE)
Digital Input Low
VIL
0.8
V
Digital Input High
VIH
2.4
V
Internal Input Pullup Current
IPU
Pullup current to internal digital supply to
set default values
3
5
7
F
A
LED Output Low Voltage
VLED_LOW
ILED = 10mA, PWM disabled, port power-on
0.8
V
LED Output Leakage
ILED_LEAK
PWM disabled, shutdown mode,
VLED = 60V
10
F
A
PWM Frequency
25
kHz
PWM Duty Cycle
6.25
%
TIMING
Startup Time
tSTART
Time during which a current limit set to
420mA is allowed, starts when power is
turned on
50
60
70
ms
Fault Time
tFAULT
Maximum allowed time for an overcurrent
condition set by ICUT after startup
50
60
70
ms
Detection Reset Time
tME
Time allowed for the port voltage to reset
before detection starts
80
90
ms
Detection Time
tDET
Maximum time allowed before detection is
completed
330
ms
Midspan Mode Detection Delay
tDMID
2
2.2
2.4
s
Classification Time
tCLASS
Time allowed for classification
19
23
ms
Mark Event Time
Time allowed for mark event
7
9
11
ms
VEEUVLO Turn-On Delay
tDLY
Time VAGND must be above the VEEUVLO
thresholds before the device operates
5.2
ms
Restart Timer
tRESTART
Time the device waits before turning on
after an overcurrent fault
16 x
tFAULT
ms
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| MAX5986AETE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 IEEE802.3 af PD w/ DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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