L6718 Datasheet, PDF (40/71 Pages) STMicroelectronics – SMBus interface for power management

Device configuration
L6718
6.6.6
Pinstrapping ⁽¹⁾
divider (KOhm)
R up
R
down
Table 12. CONFIG2/SDA pinstrapping (continued)
OVP
(above VID+OFFSET)
Offset multi-rail
Offset single-rail
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.
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.
Table 13. CONFIG3/SCL pinstrapping
Pinstrapping ⁽¹⁾
divider (KOhm)
OCP⁽²⁾
R up R down
DPM strategy ⁽²⁾
1ph-
>2ph
2ph-
>3ph
3ph-
>4ph
VFDE
enable
750
10 125% 15%
390
16 125% 15%
25% 40%
390
27 125% 15%
OFF
OFF
ON
150
15 125% 15%
25% 40%
91
12 125% 15%
91
15 125% 20%
30% 45%
100
20 125% 20%
75
18 125% 20%
30% 45%
ON
OFF
OFF
ON
ON
DPM
enable
DROOP
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
ON
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