V048K015T80 Datasheet, PDF (15/20 Pages) Vicor Corporation – VI Chip - VTM Voltage Transformation Module

Application Note (continued)
PRELIMINARY
Closed Loop Application
To compensate for the effect of the VTM’s output resistance on
the load voltage as a function of load current, a feedback loop
can be implemented as shown in Fig.30.
VTMs can also be used in a Factorized Power Architecture
system with VID control of the output voltage as a faster, more
efficient alternative to multiphase VRMs as shown in Fig.31.
High efficiency, high density PRMs in V•I Chip packages are in
development.
Please consult with Vicor application engineering for specific
application information.
Email:[e-mail]; phone: [phone]
Off-line DC-DC converters, telecom input DC-DC converters
and switching regulators may be adapted, through a suitable
interface, to provide the PRM function.
FPA Application Example
Unregulated
Input Bus
PRM
Factorized
Bus
V_f
VTM
V_f • K
Load
Figure 30—Basic Factorized Power Architecture with Pre-Regulation Module (PRM) and VTM
FPA Application Example
DC
Distribution
Bus
PRM
V_f = 32-58 Vdc
VTM
32:1
1.0-1.8
Vdc
µP
POL IC
VID Control
Figure 31—PRM and VTM, Closed loop with VID Controller
Analog
Control
45 ^{Vicor Corporation Tel: [phone] vicorpower.com}
V•I Chip Voltage Transformation Module Rev. 1.6
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