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ADP3212A Fiches technique(PDF) 14 Page - ON Semiconductor

No de pièce ADP3212A
Description  7-Bit, Programmable, 3-Phase, Mobile CPU Synchronous Buck Controller
Download  35 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

ADP3212A Fiches technique(HTML) 14 Page - ON Semiconductor

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ADP3212A, NCP3218A
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14
Table 2. PHASE NUMBER AND OPERATION MODES (Note 1)
PSI No.
DPRSLP
VID Transition
(Note 2)
Current Limit
No. of Phases
Selected by
the User
No. of Phases
in Operation
Operation Modes
(Note 3)
*
*
Yes
*
N [3,2 or 1]
N
PWM, CCM only
1
0
No
*
N [3,2 or 1]
N
PWM, CCM only
0
0
No
No
*
1
PWM, CCM only
0
0
No
Yes
N [3,2 or 1]
N
PWM, CCM only
*
1
No
No
*
1
RPM, automatic CCM/DCM
*
1
No
Yes
*
1
PWM, CCM only
1. * = Don’t Care.
2. VID transient period is the time following any VID change, including entry into and exit from deeper sleep mode. The duration of VID transient
period is the same as that of PWRGD masking time.
3. CCM stands for continuous current mode, and DCM stands for discontinuous current mode.
Figure 17. Single−Phase RPM Mode Operation
Q
S
RD
FLIP−FLOP
1 V
S
RD
VDC
DRVH
DRVL
GATE DRIVER
SW
VCC
L
L
LOAD
COMP
FB
FBRTN
CSCOMP
CSSUM
CSREF
DRVL1
SW1
DRVH1
VRMP
BST
BST1
DRVH
DRVL
GATE DRIVER
SW
VCC
DRVL2
SW2
DRVH2
BST
BST2
Q
400 ns
R2
R1
R1
R2
1 V
30 mV
IN
DCM
LLINE
IN
DCM
+
+
+
+
SWFB1
SWFB2
FLIP−FLOP
RPH
RPH
RI
RI
100 W
Q
Q
IR = AR x IRAMP
CR
VCS
RA
CA
CFB
CB
RFB
RCS
CCS
100 W


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