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L6718 数据表(PDF) 40 Page - STMicroelectronics

部件名 L6718
功能描述  SMBus interface for power management
PDF  71 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6718 数据表(HTML) 40 Page - STMicroelectronics

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Device configuration
L6718
40/71
DocID023399 Rev 3
6.6.6
CONFIG3
If the SMBus is disabled by CONFIG0, it is possible to use the CONFIG3/SCL pin as
pinstrapping CONFIG3. In this condition it is possible to select the OCP, VFDE, DPM
strategy and enable.
Using CONFIG3 pinstrapping it is possible to set:
a)
OCP - The average overcurrent can be selected between 125% and 137% of
IMAX in both sections (see Section 9.2).
b)
DPM strategy - If DPM is enabled, the device performs the automatic phase
shading on the multi-phase rail (seeSection 7.3). The phase cutting follows the
strategy selected in percentage of IMAX based on voltage sensed on the IMON
pin.
c)
VFDE - Variable frequency diode emulation can be enabled/disabled.
ULTRASONIC limits the switching frequency to 30 KH (see Section 7.4).
d)
DPMEN - Automatic dynamic phase management (seeSection 7.3) of the multi-
phase rail can be enabled or disabled when the system runs in PS0. In PS1 the
L6718 switches, from 2-phase to 1-phase, a threshold of 15% of IMAX even if
DPMEN is disabled.
With DPM off it is possible to disable the droop function.
27
100
+175 mV
+300 mV
+200 mV
18
110
+175 mV
+300 mV
+300 mV
1.
Suggested values, divider must be connected between VCC5 pin and GND.
Table 12. CONFIG2/SDA pinstrapping (continued)
Pinstrapping (1)
divider (KOhm)
OVP
(above VID+OFFSET)
Offset multi-rail
Offset single-rail
R up
R
down
Table 13. CONFIG3/SCL pinstrapping
Pinstrapping (1)
divider (KOhm)
OCP(2)
DPM strategy (2)
VFDE
enable
DPM
enable
DROOP
R up
R down
1ph-
>2ph
2ph-
>3ph
3ph-
>4ph
750
10
125%
15%
OFF
OFF
ON
390
16
125%
15%
25%
40%
OFF
ON
ON
390
27
125%
15%
ON
OFF
OFF
150
15
125%
15%
25%
40%
ON
ON
ON
91
12
125%
15%
OFF
OFF
ON
91
15
125%
20%
30%
45%
OFF
ON
ON
100
20
125%
20%
ON
OFF
OFF
75
18
125%
20%
30%
45%
ON
ON
ON



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