ADP3204 Analog Devices, ADP3204 Datasheet - Page 15

• Manufacturer Part Number: ADP3204
• Description: 3-Phase IMVP-II and IMVP-III Core Controller for Mobile CPUs
• Manufacturer: Analog Devices

turned off. During the common off time of all channels, their
currents are averaged and compared to the lower threshold.
When the averaged channel current reaches the lower threshold,
the hysteretic comparator changes state again, and turns on the
control FET of the next channel, as selected by the phase
splitter logic. This control concept ensures that the peak
currents of all channels will be the same, and therefore the
MathCAD is a trademark of MathSoft.
REV. 0
V
IN
Figure 4. 3-Phase Modified Hysteretic Regulator with ADOPT
SPLITTER
–15–
PHASE
OUT 3
OUT 2
OUT 1
PHASE 1
PHASE 2
PHASE 3
channel currents will be perfectly balanced. The ADOPT
compensation can be used the same way as in the single-phase
version discussed previously.
Since due to second-order effects, the detailed design of a
multiphase converter with the ADP320x family is rather
complex, a design aid using MathSoft’s MathCAD™ program
has been developed. Please contact ADI for further information.
COMPARATOR
HYSTERETIC
L1
L2
L3
CORE
I
I
L2
I
L1
L3
SENSE MUX
CURRENT
CS1
CS2
CS3
R
R
R
CS2
CS1
CS3
R
V
C
D
REF
OC
C
R
O
E
R
C
ADP3204
V
LOAD
OUT