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MP3924 Datasheet(PDF) 49 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) 49 Page - Monolithic Power Systems

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MP3924
– QUAD-PORT IEEE 802.3AF/AT PSE CONTROLLER
MP3924 Rev. 1.0
MonolithicPower.com
49
7/16/2021
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
INPUT_VOLTAGE (50h and 51h)
Read-only
Bits
Bit Name
Default Value
Description
50h
D[0]
INPUT_
VOLTAGE_
DATA
0
Returns the lower bit of the ADC VIN result.
51h
D[7:0]
0000 0000
Returns the higher bits of the ADC VIN result.
VIN can be calculated with the following equation:
VIN = 0.15V x COUNT
Where COUNT is the unsigned binary integer of the ADC result.
JUNCTION_TEMPERATURE (52h and 53h)
Read-only
Bits
Bit Name
Default Value
Description
52h
D[0]
JUNCTION_
TEMP
ERATURE_
DATA
0
Returns the lower bit of the ADC die temperature result.
53h
D[7:0]
0000 0000
Returns the higher bits of the ADC die temperature result.
The junction temperature can be calculated with the following equation:
Junction temperature = 0.4°C x COUNT - 40°C
Where COUNT is the unsigned binary integer of the ADC result.
PMAX_POWER_SETTING (54h and 55h)
Read/write
Bits
Bit Name
Default Value
Description
54h
D[0]
PMAX_
SETTING_
DATA
0
Returns the lower bit of the ADC PMAX setting data result.
55h
D[7:0]
0000 0000
Returns the higher bits of the ADC PMAX setting data result.
The maximum power load can be calculated with the following equation:
Max power load = 0.4W x COUNT
Where COUNT is the unsigned binary integer of the ADC result. The PMAX
power result is latched when the MP3924 starts up or is reset. The PMAX power
rating is in a decimal value as a multiple 0.4W.
DIE_ID (60h)
Read-only
Bits
Bit Name
Default Value
Description
D[7:6]
FAB
00
Returns the fab location.
D[5:4]
MAJOR_REV
00
Returns the major revision.
D[3:2]
MINOR_REV
00
Returns the minor revision.
D[1:0]
VENDOR_ID
00
Returns the vendor ID.



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