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MP3924 Datasheet(PDF) 7 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) 7 Page - Monolithic Power Systems

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MP3924
– QUAD-PORT IEEE 802.3AF/AT PSE CONTROLLER
MP3924 Rev. 1.0
MonolithicPower.com
7
7/16/2021
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
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
Power Supply
Input under-voltage lockout
(UVLO)
VIN_UVLO
VIN rising
28
29.5
31
V
Input UVLO hysteresis
VIN_UVLO_HYS
2.7
V
Input over-voltage lockout
(OVLO)
VIN_OVP
VIN rising
62
65
68
V
Input OVLO hysteresis
VIN_OVP_HYS
2.8
V
Input OVP lockout delay (7)
100
µs
Input power okay threshold
VIN_OK
VIN rising
38
40
42
V
Input power okay hysteresis
VIN_OK_HYS
0.7
V
EN logic high voltage
VHI
2.5
V
EN logic low voltage
VLI
0.4
V
EN input current
Pull EN to 0V, 3.3V
0
µA
EN turn on/off delay
tEN_ON
EN pin high pulse duration
for start-up or low-pulse
duration for shutdown
150
µs
tEN_OFF
120
Supply current
IIN
Logic pin is floating, no
connection for all output
ports, AUTO = low
2
4
mA
Shutdown current
ISD
EN = 0V
150
µA
VCC regulation
VCC
Load = 0mA
3.3
V
Load = 15mA
3.2
VCC UVLO
VCC_UVLO
VCC rising
2.3
2.5
2.7
V
VCC UVLO hysteresis
VCC_UV_HYS
170
mV
VCC current limit
VCC = DGND
17
mA
Power-on reset (POR) delay
tPOR
From VCC on to detection
0.5
ms
Detection
First detection voltage
VDET1
Test the VIN to OUTx pins
3.6
4
V
Second detection voltage
VDET2
Test the VIN to OUTx pins
7.2
8
V
Detection voltage slew rate
VSLEW
CDET = 0.1µF
0.02
V/µs
Detection current limit
IDET_LIMIT
Short VIN to OUTx
1
1.2
1.5
mA
Short-circuit detection
threshold
VSC
First detection voltage
1
1.5
1.8
V
Open-circuit current
threshold
IOPEN
10
15
25
µA



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