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PRELIMINARY
PFM V*I Chip PFM Power Factor Module
* * * * * * * * * Input: rectified 120/240 Vac sinusoidal Output: 48 Vdc programmable Output power: Up to 200 W 4,242 Vdc reinforced insulation 90% efficiency 375 W/in3 power density Low profile: 0.25" Surface mount J Lead package Meets EN 61000-3-2 harmonic current limits
F3D480T20A
DC+
+IN
TM
PR SC SG +Out
BV RSV PC
F3D480T20A
8395846576834856
-IN
PFMTM
Actual Size
Pb
S
C
NRTL
US
-Out
U.S. & FOREIGN PATS. AND PATS. PENDING. MADE IN U.S.A.
(c)
Product Description The PFM (Power Factor Module) is a V*I Chip power component that converts a rectified 120/240 Vac line to an isolated, regulated DC voltage programmable from 26 V to 48 V. Rated at 200 W, the PFM meets EN61000-3-2 harmonic current limits and is available in a double VIC package measuring only 1.69" (43,0) x 1.26" (32,0) x 0.25" (6,2). The PFM power density is 375 W/in3. The PFM is the front-end V*I Chip for AC-DC power systems. It requires only a rectifier, input filter and an output capacitor to provide a high density, power factor corrected, 200 W power supply. The high operating frequency and soft switching allow miniaturization of power train components and make EMI filter components smaller than those required by lower frequency, hard switching converters. Output energy storage is accomplished at SELV levels providing packaging and interconnect flexibility not available with conventional AC Front Ends. PFMs may be paralleled with power sharing for added power or redundancy in single or three phase systems. The output voltage can be programmed to meet the requirements of system loads and/or additional downstream conversion devices such as Vicor's Pre Regulator Modules (PRMs) and Voltage Transformation Modules (VTMs).
Absolute Maximum Ratings
Parameter
Input voltage (+IN to -IN) Operating Non-operating Input voltage slew rate PC to -IN BV to -IN PR to -OUT SC Output voltage (+OUT to -OUT) Output current Dielectric withstand (input to output) Temperature Operating junction Storage Case peak temperature during reflow Case peak temperature during reflow
Min
90 0 -0.3 -0.3 -0.3 -0.3 -0.5
Max
264 450 25 7 50 7 1.5 55 6 4,242
Unit
Vrms Vdc V/s Vdc Vdc Vdc Vdc Vdc A Vdc
Notes
Rectified AC sinusoidal 100 ms
Reinforced insulation 1 Min M-Grade M-Grade MSL 3 MSL 6
-55 -65
125 150 225 245
C C C C
Part Numbering
F
Power Factor Module
3
Input Designator 3 = 115/230 Vac
D
480
Output Voltage Designator (VOUT x10)
T
20
Output Power Designator (POUT x 0.1)
A
A = Analog Control
Package D = Double VIC w/ J leads
Product Grade Temperatures (C) Grade Storage Operating T -40 to150 -40 to125 M -65 to150 -55 to125
Input Filter / Rectifier
L
PFM
48 Vdc 200 W
Load
N
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 1 of 14
PRELIMINARY
Electrical characteristics
Rectified AC Input Source
Parameter
Source voltage low range Source voltage high range Source frequency range (Conditions: 25C case, 75% rated load and specified input voltage range unless otherwise specified.)
The PFM operates from a full bridge rectified AC line with the following characteristics:
Min
90 180 47
Typ
Max
132 264 63
Unit
Vrms Vrms Hz
Note
The PFM is not designed to support output load when the input is 132 to 175 Vrms
Input
(Operating from AC input source)
Parameter
Undervoltage shut down Overvoltage shut down Power factor Inrush current
Min
Typ
82
Max
85
Unit
Vrms Vrms
Note
Source voltage Source voltage 47 - 63 Hz
265 0.94
275 5
A pk
Output
Parameter
Set point Output voltage trim range Output current Output power OVP set point Line regulation Load regulation Efficiency No load power dissipation Current share accuracy Switching frequency ripple Line frequency ripple Start up time From application of power Dynamic response Voltage deviation Recovery time Output capacitance Hold-up capacitance Short circuit protection 1,500 1,500 2.0 2.5 6 500 2,200 2,200 5.5 10,000 10,000 6.0 5.0 S % mS F F A No overshoot Of Vout Required for PFC. Output ripple is a function of output and hold-up capacitance. See Fig.8 for hold-up time. Current limited 5 240 350 1.12 88
Min
47.5 26 0 0 56
Typ
48.0 48
Max
48.5 48.0 4.1 200 58
Unit
Vdc Vdc A W Vdc % % %
Note
Output may be trimmed down from factory set point via external trim resistor. See page 4, SC pin Vout = 48 Vdc Vout = 48 Vdc see Fig. 22 for heat sink information
0.3 0.5 90
1 1 0.75 10 300 750 2.0
120 Vrms 75% load Meets Energy Star no load limit ~1.2 MHz with 10 F ceramic bypass capacitance With 10,000 F output capacitor
W % mV pk-pk mV rms V pk-pk
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 2 of 14
PRELIMINARY
Electrical (cont.)
(conditions: 25C case, 75% rated load and specified input voltage range)
Control Pins (See page 4 for pin description)
Pin BV (Bias Voltage) PC (Primary Control) DC voltage Module disable threshold Module enable threshold Disable hysteresis Current limit Analog control PR (Parallel Port) Voltage Source current External capacitance SC (Secondary Control) Voltage Internal capacitance External capacitance 1.23 1.24 1.0 0.7 1.25 Vdc nF F Referenced to SG 0.6 1 100 7.5 V mA pF Referenced to SG, see PR pin pg.4 2.0 4.8 2.3 5.0 2.4 2.5 100 2.7 3.5 2.6 5.2 Vdc Vdc Vdc mV mA PC pulled low Referenced to -IN Min -0.5 Typ Max 48 Unit V Note Referenced to -IN
General
Parameter
Over temperature shut down Junction-to-case thermal impedance Case-to-ambient thermal impedance Dielectric withstand Insulation resistance Capacitance Leakage current Line fuse Rating Mechanical Weight Length Width Height Reflow parameters Resistance to cleaning Solvents Agency approvals (pending) IEC 68-2-45 XA Method 1 cTUVus CE Water Isopropyl alcohol 4,242 10 110 30 250 4 1.0 / 30 1.69 / 43 1.26 / 32 0.25 / 6.2
Min
125
Typ
130 0.6 2.3
Max
135
Unit
C C/W C/W Vdc M ohms pF A Vac A oz / g in / mm in / mm in / mm
Note
Junction temperature 46 mm x 46 mm x11mm heatsink #31474 with 300 LFM Input to output Input to output Input to output Always ascertain and observe applicable safety, regulatory and agency specifications
Contact Vicor for information regarding soldering of the PFM to printed circuit boards. +55 5C +35 5C UL/CSA 60950, EN 60950 Low voltage directive
Electromagnetic Compatibility (configured as illustrated in Fig. 18 )
Harmonic currents Line disturbance / immunity Transient / surge immunity Conducted emissions Flicker / inrush EN 61000-3-2, Amendment 14 EN 61000-4-11 EN 61000-4-5 EN 55022, Level B EN 61000-3-3 See Fig. 11 Interruptions and brownouts 2 kV - 50 s line or neutral to earth 1 kV - 50 s line to neutral With filter ( see Fig. 18 )
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 3 of 14
PRELIMINARY
Pin/Control Functions
Power Factor Module (PFM)
DC+ PR SC SG BV RSV PC -IN -OUT +IN
SC - secondary control (analog control models only) The output voltage may be programmed, margined or trimmed down by connecting a voltage source or resistor between the SC port and SG port. The slew rate of the output voltage may be reduced by controlling the rate-of-rise for the voltage at the SC port ( e.g. to limit inrush into a capacitive load). The following expression should be used to calculate the required set point resistor value. No resistor is required if the user desires a nominal 48 V output. R = ( Vo / (48 - Vo) ) 30.1 k Where: R = the set point resistor Vo = the desired output voltage set point Example: Vo R 42 V 211 k 36 V 90.3 k
+OUT
BOTTOM VIEW
Figure 1-- PFM pin out
Primary side
+IN / -IN - DC voltage The PFM operates from a full wave rectified AC voltage within the limits shown on page 2. PFMs have internal over / undervoltage lockout functions that prevent operation outside of the specified rms input range. PFMs will turn on when the input voltage rises above its undervoltage lockout. If the input voltage exceeds the overvoltage lockout, PFMs will shut down until the overvoltage fault clears. BV - bias voltage A 47 F 50 V electrolytic capacitor must be connected between this port and -IN to provide energy storage for the primary bias circuit. RSV - reserved PC - primary control The PFM voltage output is enabled when the PC pin is open circuit (floating). To disable the PFM output voltage, the PC pin is pulled to -IN. Open collector optocouplers, transistors, or relays can be used to control the PC pin. When using multiple PFMs in a high power array, the PC ports should be tied together to synchronize their turn on.
Table 1
1.25 V Full Scale
SC
P
ref 1.25 V
30.1 k 1 nF
SG
Figure 2--Functional block diagram
Secondary side
DC+ A hold-up capacitor should be connected between this port and SG to provide output hold-up in the event of an input power failure. For 10 ms hold-up at full load, a 2,200 F 50 V electrolytic capacitor is recommended. DC+ should not be back driven. PR - parallel port (analog control models only) The PR port signal, which is proportional to the PFM output power, supports current sharing among PFMs. To enable current sharing, PR ports should be interconnected. No bypass capacitance should be used when interconnecting PR ports and steps should be taken to minimize stray capacitance and noise coupling into this line (e.g, by minimizing the width of PR port interconnect traces that lay over, or in proximity to, signal grounds or power / ground planes). The PR port is referenced to SG. SG - signal return (analog control models only) This port should be used as reference for the SC, PR, and DC+ ports. Care must be taken to insure there are no low impedance paths between -OUT and SG. Such a path could allow current to bypass the internal current sense resistor. + OUT / -OUT - voltage output These ports provide the isolated DC output voltage. The -OUT pin is separated from the SG (Signal Return) pin by the internal current sensing resistor. Safety consideration Care must be exercised to insure appropriate spacing, clearance and creepage distances are maintained between line side terminals and secondary SELV terminals.
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 4 of 14
PRELIMINARY
PFM Theory of Operation
The PFM power-processing module consists of two major functional blocks: an Adaptive Voltage Transformation Module (VTM) that interfaces directly to the rectified line followed by a microprocessor controlled Post Regulator Module (PRM). In contrast to offline power factor correction topologies, input current shaping and energy storage are accomplished on the secondary side of the isolation boundary.
+IN
Adaptive VTM
The Adaptive VTM acts as a nearly ideal DC-to-DC transformer. It accepts the rectified AC input from the power source, configures its step down ratio, or K factor, based on the magnitude of the input voltage, and produces an isolated DC output that instantaneously tracks the input. The Adaptive VTM configures itself by paralleling input cells in low voltage input mode or by series configuration of input cells in high voltage input mode. Operating over the worldwide AC mains, the Adaptive VTM reduces the voltage variation applied to the PRM stage from 3 to1 to 1.5 to1. This reduction in voltage range allows greater performance and economy than would be possible without Adaptive Transformation, which is enabled by Vicor's proprietary class of Cascaded Topologies.
To PRM Control
-IN
Figure 3-- 120 Vac input configuration
The PFM uses a Sine Amplitude Converter (SAC) Cascaded Topology providing zero-voltage/zero-current switching through a low Q resonant circuit to eliminate switching losses. The SAC can be operated efficiently at high frequencies, typically in the 3 MHz range. The high operating frequency allows miniaturization of power train components with a commensurate increase in converter power density. High operating frequency and soft switching makes EMI filtering components smaller than those required by lower frequency, hard switching converters.
+IN
To PRM Control
-IN
Figure 4-- 240 Vac input configuration
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 5 of 14
PRELIMINARY
PFM Theory of Operation cont.
PRM with PFC
The output of the VTM drives the PFC/PRM. The PFC/PRM (Figure 5 ) is a microprocessor controlled, high-efficiency, zero-voltage switching buck-boost regulator providing output voltage regulation and input current shaping. The input voltage, isolated and adaptively transformed by the VTM, and the PRM's output voltage and output current are sampled by the microprocessor. The processor uses a digital algorithm to develop a control signal used to simultaneously regulate the output voltage and shape the module input current, providing harmonic current reduction. This control signal is fed to the switch management ASIC. This provides proper switch timing, maintaining zero-voltage switching under all operating conditions. Energy storage is accomplished outside the PFM by means of an output capacitor that may be sized to meet the user's hold up requirements.
DC+
External Cap
+OUT
From VTM
To External Cap and Load
-OUT ZVS Control
Controller
Figure 5 -- The PRM with PFC
+IN
T2
1
Q1
2
T1
T2
2
Q2
1
Q5
+OUT
1 2
T2
PC BV
T2
2
Q3
1
T1
-OUT
Q6
2 1
T2
Frequency Lock/Control
Proprietary Analog Buck-Boost Control
T2
1
Q4
2
VREF 1.25 V
30.1 k
1.25 V Full Scale
P PR SG SC
1 nF
-IN
Figure 6 -- Functional block diagram of the PFM
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 6 of 14
PRELIMINARY
Electrical
(conditions: 25C case, 75% rated load and specified input voltage range)
220
30
Output Power
180 160 140 120 100 26
Hold-up Time (mS)
37 48
200
25 20 15 10 5 0 50 100 150 200
Output Voltage
Output Power (W)
Figure 7 -- Output power rating vs. trimmed output voltage
Figure 8 -- Hold up time with 2,200 F output and hold-up capacitors with 48 Vdc output
91 90
25.0
88 87 86 85 84 83 82 50 75 100 125 150 175 200
Power Dissipation (W)
89
20.0 15.0 10.0 5.0
Efficiency (%)
0.0
50 75 100 125 150 175 200
Output Power (W)
Output Power (W)
Figure 9 -- Efficiency vs. Output Power (120 Vrms, 48 Vdc)
Figure 10 -- Power Dissipation vs. Output Power (120 Vrms, 48 Vdc)
PFM Harmonic Current
2.50
Measured Value Limit
2.00
+
4.0 A +In 0.5 F 600 V
DC+
PR SC
+
Optional Hold-up Cap. 2,200 F 50 V
Amperes
1.50
Rectified 120 / 240 Vac
+
47 F 50 V
BV RSV PC
SG
PFM
+OUT -OUT
Output Cap.
1.00
-
+
-In
2,200 F 50 V
Load
0.50
0.00 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Harmonic
Figure 11 -- Harmonic Current vs. EN61000-3-2 limits (115 Vrms 180 W Out)
Figure 12 -- PFM test circuit
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 7 of 14
PRELIMINARY
Electrical (cont.)
Figure 13 -- Typical Input Current (230 Vrms 200 W Out)
Figure 14 -- Transient Response Input:120 Vac, 60 Hz Output step load: 10% to 90% to 10%
Figure 15 -- Output Ripple (Line frequency)
Figure 16 -- Output Ripple (Switching frequency)
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 8 of 14
PRELIMINARY
Electrical (cont.)
PFM Applications
L2
HOLD-UP CAP
F1 L
DC+ +In
PR SC
C4 R1
+
120 / 240 Vac
Filter/ Rectifier
C1
+
BV RSV PC
SG
VC PC TM IL NC PR
F2
PFM
+OUT
+In
PRM-AL
VH SC SG OS NC CD
+In
+Out
ROS RCD
Factorized Bus (Vf)
L1 2 4 3
+Out
1
TM VC PC
VTM K Ro
-Out
+Out
+
C5 C6
+
R2
L O A D
1.2 Vdc 100 A
N
-In
Refer to Fig.18
-OUT
-In
-Out
L3
-In
-Out
P048F048T24AL
C2 C3
V048F015T100
Connect to a copper shield plane under the PFM
Ref Des F1 F2 C1 C2, C3 C4, C5 C6 L1 L2 Ros RCD R1 R2
Description Fuse, 3.15 A, 5x20 Fuse 6 A 47 F, 50 V 4.7 nF, 250 V, Y2 2,200 F, 50 V 88 F 63 V Dual winding inductor, 0.1 nH / winding Ferrite bead, 6 A 33 ohm @ 100 MHz 2.9 K 32.4 1/16 Watt for adj. see SC pin p.11 1/16 Watt 10
Vicor P/N
30707-476 19726-972
29852-R10 29187-33R0
Figure 17 -- Typical FPA (Factorized Power Architecture) from the wall plug to the point of load. See PRM data sheet (P048F048T24AL) for other output voltage / current options.
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 9 of 14
PRELIMINARY
Electrical (cont.)
Input Filter and Rectifier
The circuit shown below provides AC line rectification, transient suppression, and conducted emissions filtering to comply with standards imposed by the EMC (Electromagnetic Compatibility) directive. These include the transient immunity standard EN 61000-4-5, and the conducted emissions standard EN 55022, level B.
C10 D10 R1 1 D1 F1 L 120 / 240 VAC N Z2 D3 D4 3 4 Z3 D6 C5 C7 C8 C14 C15 C1 C2 C3 C4 D5 D2 Z1
1 6
C12
L1
25
30
2
DC+ +In
D7 C6 D9
PR SC
C16
Q1
R2
D8 C9
BV RSV PC
SG
PFM
+OUT
1
-In
C17
2
J2
-OUT
C11
C13
Connect to a copper shield plane under the PFM
REF DES C1 - C4 C5 C6 C7, C8, C14, C15 C9 C10 - C13 D1 - D4 Q1 D5, D6, D10 D7 D8 D9 F1 J1 - J3 L1 R1 R2 Z1 Z2, Z3
DESC CAP X7R 0.1uF 630V 1812 CAP X7R 0.01uF 500V 1206 CAP 1uF 100V 1206 CAP 0.022uF 630V 1206 CAP 47uF 50V ALEL SMD CAP 4.7nF 250V Y2 DIODE 3A 1KV UF SMD MOSFET TVS 200V 600W SMB ZENER DIODE 15V DIODE 1N4148 ZENER DIODE 24V FUSE 3.15A 250V SMD TERM BLOCK 2 POS SMD CHOKE COMMON MODE RES 200 1% 1206 RES 1K 1% 1206 SIDACTOR 200V MOV 220V
MFG TDK KEMET SAMSUNG TDK PANASONIC MURATA CENTRAL SEMI VISHAY ON SEMI DIODES INC. ON SEMI DIODES INC. LITTELFUSE WECO GOWANDA KOA SPEER KOA SPEER LITTELFUSE LITTELFUSE
MFG P/N C4532X7R2J104MT000N C1206C103KCRACTU CL31B105KCHNNNE C3216X7R2J223KT0L0U ECE-V1HA470XP GA355DR7GC472KY02L CMR3U-10M SUM45N25-58 P6SMB200AT3 BZT52C15 MMSD4148T1G BZT52C24 0465 3.15 140-A-524-SMD/02 51-935 ERJ-P08J201V RK73H1JT1001F P2000SB V240CH8
Figure 18 -- Typical application circuit
PFM Evaluation Board
C16
PFM
C17
Figure 19 -- The PFM evaluation board shown (actual size) above illustrates the layout and compact size of a complete AC to 48 Vdc, 200 Watt front end power supply using the PFM.
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 10 of 14
PRELIMINARY
Electrical (cont.)
PFM Applications
The block diagram below shows an example of a Factorized Power system from the wall plug to the point-of-load. The PFM directly regulates a primary high power output through a VTM to provide voltage division. A secondary output is independently regulated with a PRM. Auxiliary outputs are derived through a V*I Chip Bus Converter Module (BCM) and non-isolated POL converters.
Input Filter / Rectifier
L
120 / 240 Vac
PFM
VTM
NP NS
Output 1
N
PRM
L
VTM
NP NS
Output 2
BCM
NP NS
niPOL
L
Output 3
niPOL
L
Output 4
Figure 20 -- Typical application using Factorized Power Architecture (FPA)
The block diagram below shows a 400 Watt PFC front end with two PFMs in a parallel configuration. Higher power can be achieved by adding additional PFMs.
PFM
Input Filter / Rectifier
L
120 / 240 Vac
48 Vdc 400 Watts
Load
N
PFM
Figure 21 -- Two PFMs operated in parallel for additional power.
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 11 of 14
PRELIMINARY
Thermal Management
PFM
7
Case-to-ambient thermal resistance with Heatsink #31474
6
Thermal Resistance (C/W)
5
4
3
2
1
0 0 200 400 600 800 1000 1200
Air Velocity (LFM)
Figure 22 -- Case to ambient thermal resistance vs. airflow using heatsink #31474 (46mm x 46mm x 11mm) with MCMStrate 2 mil interface
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 12 of 14
PRELIMINARY
Mechanical Drawings
43.0 1.69
6.2 0.25 (6) 1.10 0.043
3.01 0.118
36.99 1.456
3.01 0.118
(3)
1.22 0.048
8.56 0.337
INPUT
32.0 1.260
30.00 1.181
26.00 1.024
22.00 0.866
OUTPUT
28.00 1,102 (2) 8.10 0.319
INPUT
OUTPUT
C L
24.00 0.945
20.00 0.787 10.00 0.394
22.54 0.887 14.94 0.588 11.10 16.94 0.437 12.94 0.667 0.509
C L TOP VIEW (COMPONENT SIDE) BOTTOM VIEW
NOTES: 1- DIMENSIONS ARE mm/in 2- UNLESS OTHERWISE SPECIFIED, TOLERANCES ARE: .X/(.XX) = 0.025/(.01); XX/(.XXX) = 0.13/(.005)
Figure 23 -- PFM outline drawing
3.26 0.128
36.74 1.446
3.26 0.128 0.51 TYP 0.020
DC+
1.38 TYP 0.054
(12)
1.48 0.058
(2)
8.94 0.352
(6)
1.60 0.063
+IN
PR SC SG
(2) BV RSV PC (2) 22.54 0.887 (2) (2) 16.94 0.667 14.94 0.588 (2) 11.48 0.452 (4) 8.48 0.334 (2) -IN -OUT (2) 10.00 0.394 (2) 20.00 0.787 (2) 22.00 0.866 26.00 1.024
28.00 1.102 30.00 1.181
+OUT
(2) 24.00 0.945
(2)
(2) 12.94 0.509
RECOMMENDED LAND PATTERN
(COMPONENT SIDE SHOWN)
NOTES: 1- DIMENSIONS ARE mm/in 2- UNLESS OTHERWISE SPECIFIED, TOLERANCES ARE: .X/(.XX) = 0.025/(.01); XX/(.XXX) = 0.13/(.005)
Figure 24 -- PFM PCB land and layout information
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 13 of 14
PRELIMINARY
Warranty
Vicor products are guaranteed for two years from date of shipment against defects in material or workmanship when in normal use and service. This warranty does not extend to products subjected to misuse, accident, or improper application or maintenance. Vicor shall not be liable for collateral or consequential damage. This warranty is extended to the original purchaser only. EXCEPT FOR THE FOREGOING EXPRESS WARRANTY, VICOR MAKES NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Vicor will repair or replace defective products in accordance with its own best judgement. For service under this warranty, the buyer must contact Vicor to obtain a Return Material Authorization (RMA) number and shipping instructions. Products returned without prior authorization will be returned to the buyer. The buyer will pay all charges incurred in returning the product to the factory. Vicor will pay all reshipment charges if the product was defective within the terms of this warranty. Information published by Vicor has been carefully checked and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Vicor reserves the right to make changes to any products without further notice to improve reliability, function, or design. Vicor does not assume any liability arising out of the application or use of any product or circuit; neither does it convey any license under its patent rights nor the rights of others. Vicor general policy does not recommend the use of its components in life support applications wherein a failure or malfunction may directly threaten life or injury. Per Vicor Terms and Conditions of Sale, the user of Vicor components in life support applications assumes all risks of such use and indemnifies Vicor against all damages.
Vicor's comprehensive line of power solutions includes high density AC-DC and DC-DC modules and accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom power systems.
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor components are not designed to be used in applications, such as life support systems, wherein a failure or malfunction could result in injury or death. All sales are subject to Vicor's Terms and Conditions of Sale, which are available upon request.
Specifications are subject to change without notice.
Intellectual Property Notice
Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the products described in this data sheet. Interested parties should contact Vicor's Intellectual Property Department.
Vicor Corporation 25 Frontage Road Andover, MA, USA 01810 Tel: 800-735-6200 Technical Support: 800-927-9474 Fax: 978-475-6715 email Vicor Express: vicorexp@vicr.com Technical Support: apps@vicr.com
Vicor Corporation Tel: 800-735-6200 vicorpower.com
Power Factor Module F3D480T20A
Rev. 1.0
Page 14 of 14
10/05

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