
Vicor Corporation Tel: 800-735-6200 vicorpower.com
VI Chip Evaluation Board
Rev. 1.1
Page 1 - 4
Please read this document before applying input voltage to
the Evaluation Board.
Factorized Power Architecture (FPA) offers a fundamentally
new and improved approach to distributed power.* The FPA
Evaluation Board described in this document is intended to
acquaint you with some of the benefits and features of FPA,
and it is not designed to be used or installed in “End Use”
equipment.
The PRM / VTM Chip Set mounted on this Evaluation Board
features a unique "Adaptive Loop" compensation feedback:
a single-wire alternative to traditional remote sensing and
feedback loops that enables precise control of an isolated
Point-of-Load (POL) voltage without the need for either a
direct connection to the POL or for noise sensitive, bandwidth
limiting, isolation devices in the feedback path.
In operation, VI Chips can operate safely at high temperatures.
Use caution when connecting test probes and interface lines to
avoid touching hot surfaces. Be sure the power is off before
making or breaking connections to the Evaluation Board.
* Refer to Vicor document “DC-DC Converter Chip Set Overview”
for a description of FPA and an overview of its essential elements.
Recommended Fastening Hardware:
QTY
Description
4
#6 AWG Ring Lug
4
#10-32 Screw
4
#10 Flat Washer
4
#10 Lock Washer
4
#10 Hex Nut
Manufacturer P/N
PANDUIT LCAS6-10-L
Vicor P/N
Kit # 26647
All hardware is Stainless Steel except Ring Lugs.
Kit # 26647 is not included with Evaluation Board.
Test Procedure
1.0 Recommended Equipment
1.1 DC Power supply – 0-100 V; 500 W; 10 A
1.2 DC Electronic load – Pulse capable; 0-100 V; 100 A
1.3 DMM
1.4 Oscilloscope
1.5 Interconnect cables (appropriately sized for current)
1.6 Fastening hardware
1.7 Fan
1.8 Safety glasses
1.9 Data sheets for the specific PRM and VTM models
2.0 Description of FPAEvaluation Board Components and
Features
(Refer to Figure 2 or 3 for item location)
2.1 +IN and -IN
Source voltage connection terminals
2.2 PC/TP1
Enable / disable connection terminal
2.3 IL
Resistor R1 for adjusting current limit
2.4 SC
Capacitor C5 for adjusting soft start
2.5 OS
Output voltage set resistor R4
2.6 CD
Compensation device resistor R6
2.7 C6
Optional Vf capacitor
2.8 J1
Vf VIEW oscilloscope jack
2.9 TP2/TP4
+/-VTM input Kelvin connection
test points
2.10 TP3/TP5
+ /-VTM output Kelvin connection
test points
2.11 J2
VoVIEWoutput voltageoscilloscope jack
2.12 +OUT / -OUT Load connection terminals
FPA Evaluation Board
DC-DC Converter Chip Set
Up to 100 A output
Easy to use
Features Adaptive Loop feedback
}
-In
PC
VC
TM
+In
-Out
+Out
VTM
+Out
-Out
K
Ro
+Out
–Out
+In
–In
VC
PC
TM
IL
NC
VH
SC
PR
SG
OS
NC
CD
PRM-AL
Factorized
Bus (V
f
)
Vin
Vout
Figure 1
— The P048F048T24AL PRM is used with any 048 input
series VTM to provide a regulated and isolated output.
DC-DC Converter Implementation
PRELIMINARY
Operating Guide