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MP3924 Datasheet(PDF) 10 Page - Monolithic Power Systems

Part # MP3924
Description  Quad-Port, IEEE 802.3af/at PSE Controller for Power over Ethernet
PDF  56 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP3924 Datasheet(HTML) 10 Page - Monolithic Power Systems

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MP3924
– QUAD-PORT IEEE 802.3AF/AT PSE CONTROLLER
MP3924 Rev. 1.0
MonolithicPower.com
10
7/16/2021
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS (continued)
VIN = 54V, PGND, DGND, SGND1, and SGND2 are connected together, RSENSE = 0.25Ω,
TJ = -40°C to +125°C (6), typical value is tested at TJ = 25°C, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
Max
Units
Short circuit fast-off
threshold
VSCP
ILIMx bit = 0
212
mV
ILIMx bit = 1
425
mV
Sense pin bias current
-1
+1
µA
Thermal shutdown (7)
150
°C
Thermal shutdown
hysteresis (7)
25
°C
Total Load Power Limit
Load power limit on all four
ports
PMAX
RMAX = 49.9
kΩ
49.9
W
RMAX
= 120kΩ
120
W
Maximum load capability on
all four ports
PMAX_LIMT
Float the PMAX pin
204.8
W
Maximum load power
protection delay
tMAX_DLY
TPMAX bit = 10
100% x PMAX < load < 150% x
PMAX
60
ms
Load > 150% x PMAX
2
ms
DC Load Disconnection
DC disconnect hold
threshold
VDCHOLD
Decrease output load until
output port power off
1.25
1.875
2.5
mV
DC connect power time
tDCON
Load time to reset tDCOFF timer
37.5
43.75
50
ms
DC disconnect power
remove time
tDCOFF
Time from load < VDCHOLD to
gate off
300
350
400
ms
Analog-to-Digital Converter (ADC)
ADC resolution
9
bits
Max ADC current range
ADC results = 1 1111 1111
(2.4mA/count)
1.216
A
Max ADC voltage range
ADC results = 1 1111 1111
(0.15V/count)
76.65
V
ADC junction temperature
range
ADC results = 0 0000 0000 to
1 1111 1111
(0.4°C/count)
-40
+164.4
°C
Max ADC PMAX setting
range
ADC results = 1 1111 1111
(0.4W/count)
204.8
W
Current conversion
I = 600mA
254
count
Voltage conversion
V = 44V
293
count
V = 57V
380
count
Temperature conversion (7)
TJ = 25°C
163
count
TJ = 125°C
413
count
PMAX setting conversion
RMAX = 49.9
kΩ
125
count
RMAX
= 120kΩ
300
count



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