參數(shù)資料
型號(hào)： L6716
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48
封裝： 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFP-48
文件頁數(shù)： 39/57頁
文件大?。?/td> 829K
代理商： L6716
Low power state management and PSI#
L6716
44/57
Doc ID 14521 Rev 3
19
Low power state management and PSI#
The device is able to manage the low power state mode: when the PSI is driven low (PSI is
active low) the device turns OFF some phase in order to increase the system efficiency.
The number of phases active when low power state is active depends on the OCSET/PSI_A
pin (trough ROCSET versus SGND) as shown in the following table:
If DVID (dynamic VID change) happens during low power state (PSI low), the device turns
on all the N phases in order to follow the DVID change reducing the over/under shoot of the
output voltage.
Note:
If the PSI is already low during the start-up, the device implements the soft-start using the N
phases selected trough PWM4 pin. When the soft-start is finished the device turns OFF
some phases in according to the PSI strategy.
Table 11:
# phases when PSI is asserted
# phase
normal mode
(N)
# phase
PSI mode
(N_PSI)
Phases
enabled
ROCSET
4
1
PHASE1
2
PHASE1
PHASE3
3
1
PHASE1
2
PHASE1
PHASE3
2
1
PHASE1
2N. A.
Do not use this condition (Not applicable)
R
OCSET
V
OCSET MIN
()
DCR MAX
)
()
Rg
-----------------------------------
I
OUT OCP
()
N
-------------------------------
ΔIL
2
---------
+
77
μA
+
------------------------------------------------------------------------------------------------------------------------
=
R
OCSET
V
OCSET MIN
()
DCR MAX
()
Rg
--------------------------------
I
OUT OCP
()
N
-------------------------------
ΔIL
2
---------
+
------------------------------------------------------------------------------------------
=
R
OCSET
V
OCSET MIN
()
DCR MAX
()
Rg
--------------------------------
I
OUT OCP
()
N
-------------------------------
ΔIL
2
---------
+
------------------------------------------------------------------------------------------
=
R
OCSET
V
OCSET MIN
()
DCR MAX
)
()
Rg
-----------------------------------
I
OUT OCP
()
N
-------------------------------
ΔIL
2
---------
+
77
μA
+
------------------------------------------------------------------------------------------------------------------------
=
R
OCSET
V
OCSET MIN
()
DCR MAX
()
Rg
--------------------------------
I
OUT OCP
()
N
-------------------------------
ΔIL
2
---------
+
------------------------------------------------------------------------------------------
=
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