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MP2884A Datasheet(PDF) 44 Page - Monolithic Power Systems

No. de pieza MP2884A
Descripción Electrónicos  Digital, Multi-Phase PWM Controller with PMBus and PWM-VID
PDF  107 Pages
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Fabricante Electrónico  MPS [Monolithic Power Systems]
Página de inicio  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2884A Datasheet(HTML) 44 Page - Monolithic Power Systems

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MP2884A – DIGITAL PWM CONTROLLER WITH PMBUS AND PWM-VID
MP2884A Rev. 1.01
www.MonolithicPower.com
44
12/25/2018
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.
Bits
Bit Name
Description
7
RESERVED
Unused. X indicates that writes are ignored and reads are always 0.
6:0
RSAMP_OFFSET
Offset on the remote sense amplifier. This value is in two’s complement binary
format. Bit[6] is the sign bit.
If the remote sense amplifier sets the unity gain, the resolution is 0.5mV/LSB.
If the remote sense amplifier sets the half gain, the resolution is 0.8mV/LSB.
MFR_VFB_DIGI_GAIN (2Eh)
This register sets a digital gain to fine-tune the VFB sense value for the DC loop.
Command
MFR_VFB_DIGI_GAIN
Format
Unsigned binary
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
x
x
x
x
x
VFB_DIGI_GAIN
Bits
Bit Name
Description
15:11
RESERVED
Unused. X indicates that writes are ignored and reads are always 0.
10:0
VFB_DIGI_GAIN
Multiplies the VFB ADC sense value by the digital gain. The result is used for the
DC loop. Default value is 1024 for the unity gain.
VFB_SENSE_FINAL = VFB_ADC x VFB_DIGI_GAIN/1024
MFR_IMON_DIGI_GAIN (2Fh)
This register sets a digital gain used to fine-tune the IMON sense value for the output current report.
Command
MFR_ IMON_DIGI_GAIN
Format
Unsigned binary
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
x
x
x
x
x
IMON_DIGI_GAIN
Bits
Bit Name
Description
15:11
RESERVED
Unused. X indicates that writes are ignored and reads are always 0.
10:0
IMON_DIGI_GAIN
Multiplies the IMON ADC sense value by the digital gain. The result is used for
output current reporting. The default value is 1024 for the unity gain.
IMON_SENSE_FINAL = IMON_ADC x IMON_DIGI_GAIN/1024
MFR_DC_LOOP_CTRL (30h)
This register sets the output voltage DC loop performance and sets the power mode when adding
phases during the transient.
Command
MFR_DC_LOOP_CTRL
Format
Unsigned binary
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
PWM_PRD_ERROR_THRE
DC_LOOP_HOLD_TIME



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