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V048K060M040 Datasheet

  • V048K060M040

  • VI Chip - VTM Voltage Transformation Module

  • 15頁(yè)

  • VICOR   VICOR

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PRELIMINARY
Application Note
(continued)
In Figures 21 鈥?23;
K = VTM Transformation Ratio
R
O
= VTM Output Resistance
V鈥 Chip Voltage Transformation Module
V
f
= PRM Output (Factorized Bus Voltage)
V
O
= VTM Output
V
L
= Desired Load Voltage
FPA Adaptive Loop
Vo = V
L
鹵
1.0%
VC
PC
TM
IL
NC
PR
VH
SC
SG
OS
NC
CD
R
OS
R
CD
PRM-AL
+In
+Out
Factorized
Bus (V
f
)
V
L
(Io鈥o)
V
f
=
+
K
K
+In
+Out
-Out
TM
VC
PC
VTM
+Out
Vin
鈥揑n
鈥揙ut
-In
K
Ro
L
O
A
D
-Out
Figure 21
鈥?The PRM controls the factorized bus voltage, V
f
, in proportion to output current to compensate for the output resistance, Ro, of the VTM. The VTM
output voltage is typically within 1% of the desired load voltage (V
L
) over all line and load conditions.
FPA Non-isolated Remote Loop
Remote
Loop
Control
VC
PC
TM
IL
NC
PR
VH
SC
SG
OS
NC
CD
Vo = V
L
鹵
0.4%
PRM-AL
+In
+Out
Factorized
Power Bus
V
f
= f (Vs)
+In
+Out
+S
-Out
TM
VC
PC
VTM
+Out
Vin
鈥揑n
鈥揙ut
-In
K
Ro
鈥揝
-Out
L
O
A
D
Figure 22
鈥?An external error amplifier or Point-of-Load IC (POLIC) senses the load voltage and controls the PRM output 鈥?the Factorized Bus 鈥?as a function of
output current, compensating for the output resistance of the VTM and for distribution resistance.
FPA Isolated Remote Loop
Remote
Loop
Control
Vo = V
L
鹵
0.4%
VC
PC
TM
IL
NC
PR
+In
VS
FB
FG
NC
NC
NC
+In
+Out
PRM-IF
Factorized
Power Bus
V
f
= f (Vs)
+S
-Out
TM
VC
PC
+Out
VTM
+Out
Vin
鈥揑n
鈥揙ut
-In
K
Ro
鈥揝
-Out
L
O
A
D
Figure 23鈥擜n
external error amplifier or Point-of-Load IC (POLIC) senses the load voltage and controls the PRM output 鈥?the factorized bus 鈥?as a function of
output current, compensating for the output resistance of the VTM and for distribution resistance. The Factorized Bus voltage (V
f
) increases in proportion to load
current. The remote feedback loop is isolated within the PRM to support galvanic isolation and hipot compliance at the system level.
vicorpower.com
800-735-6200
V鈥 Chip Voltage Transformation Module
V048K060T040
Rev. 1.0
Page 12 of 15

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