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STPM098C Folha de dados(PDF) 87 Page - STMicroelectronics

Nome de Peças STPM098C
Descrição Electrónicos  Automotive dual digital 8-phase controller with PMBus™
PDF  110 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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STPM098C Folha de dados(HTML) 87 Page - STMicroelectronics

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Figure 73. DPS timing diagram
t
PHASE2_ADD
PHASE2_DROP
PHASE3_ADD
PHASE3_DROP
PHASE4_ADD
PHASE4_DROP
(ISENj−CFILT/VREF1)
M
j=1
PHASE5_ADD
PHASE5_DROP
IPHASE5 status
IPHASE4 status
IPHASE3 status
IPHASE2 status
IPHASE1 status
PWM5 HIZ
PWM4 ACTIVE
PWM3 ACTIVE
PWM4 ACTIVE
PWM1 ACTIVE
PWM4 HIZ
PWM3 HIZ
PWM2 HIZ
PWM4 HIZ
PWM3 HIZ
PWM2 HIZ
When DPS is active, a minimum number of active phases can be configured through a dedicated PMBus™
command as follows:
Table 68. DPS minimum phase drop limit configuration bits
NPH_PS02
NPH_PS01
NPH_PS00
Description
0
0
0
At least 1 active phase (default)
0
0
1
At least 1 active phase
0
1
0
At least 2 active phases
0
1
1
At least 3 active phases
1
0
0
At least 4 active phases
1
0
1
At least 5 active phases
1
1
0
At least 6 active phases
1
1
1
At least 7 active phases
DPS minimum phase number (NPH_PS) should be always lower than or equal to the phase number assigned to
the loop (PHASE_CFG).
In case DPS minimum phase number is set higher than the assigned phase number, the NPH_PS configuration
has the higher priority in defining the number of active phases.
Example: if NPH_PS = 0x4 for loop 1 while PHASE_CFG = 0x2, then loop 1 will have 4 active phases instead of
2.
During fast load increase DPS control is overridden to quickly support the current change. The DCO output period
is monitored and if it falls below an adaptive threshold the controller instantly increases the number of active
phases.
If
TDCO≤ 1N+1TNOMINALoccurs,theactivephasenumberoftheloopisincreasedby1,independentlyoftheDPS
assertion.
STPM098C
Functional description
DS14440 - Rev 1
page 87/110



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