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PRELIMINARY DATASHEET
MIL-COTS BCM Bus Converter
TM
Features
* 100C baseplate operation * 270 V to 33.75 V Bus Converter * 235 Watt (360 Watt for <5 ms) * MIL-STD-704E/F compliant * High density - up to 312 W/in3
Size: 1.91 x 1.09 x 0.37 in 48,6 x 27,7 x 9,5 mm
* Low weight - 1.10 oz (31.3 g) * ZVS / ZCS isolated Sine Amplitude Converter * Typical efficiency >95% * <1 s transient response * Isolated output
2
* Small footprint - 1.64 and 2.08 in
* No output filtering required
* Height above board - 0.37 in (9.5 mm)
Applications
* High Voltage 270V Aircraft Distributed Power * 28Vdc MIL-COTS PRM Interface (MP028F036M21AL) * Communications Systems * High Density Power Supplies
Product Overview
The MIL-COTS VI BRICK BCM module uses advanced Sine Amplitude ConverterTM (SACTM) technology, thermally enhanced packaging technologies, and advanced CIM processes to provide high power density and efficiency, superior transient response, and improved thermal management. These modules can be used to provide an isolated intermediate bus to power non-isolated POL converters and due to the fast response time and low noise of the BCM, capacitance can be reduced or eliminated near the load.
Part Numbering
MC
MIL-COTS Bus Converter Module
270
Input Voltage Designator
A
Package Size
330
Output Voltage Designator (=VOUT x10)
M
024
Output Power Designator (=POUT /10)
F
P
Product Grade Temperatures (C) Grade M= Operating Storage
Baseplate F = Slotted flange P = Pin-fin heat sink[a]
[a]
Pin Style P = Through hole
-55 to +100 -65 to +125
contact factory
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 1 of 17
SPECIFICATIONS Absolute Maximum Ratings
Min +In to -In PC to -In TM to -In +In /-In to +Out /-Out (hipot) +In /-In to +Out /-Out (working) +Out to -Out -1.0 -1.0 -0.3 -0.3 Max +400 +20 +7 4242 500 +60 Unit Vdc Vdc Vdc V V Vdc
PRELIMINARY DATASHEET
CONTROL PIN SPECIFICATIONS
See page 13 for further application details and guidelines.
PC - VI BRICK BCM Primary Control
The PC pin can enable and disable the BCM. When held below VPC_DIS the BCM shall be disabled. When allowed to float with an impedance to -IN of greater than 50 k the module will start. When connected to another BCM PC pin, the BCMs will start simultaneously when enabled. The PC pin is capable of being driven high by either an external logic signal or internal pull up to 5 V (operating).
TM - VI BRICK BCM Temperature Monitor
The TM pin monitors the internal temperature of the BCM within an accuracy of +5/-5C. It has a room temperature setpoint of ~3.0 V and an approximate gain of 10 mV/C. It can source up to 100 A and may also be used as a "Power Good" flag to verify that the BCM is operating.
Note: If TM is not used to validate the thermal management system, a 100C case (baseplate) maximum applies.
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 2 of 17
SPECIFICATIONS (CONT.)
PRELIMINARY DATASHEET
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of -55C < TC < 100C (T-Grade); All other specifications are at TC = 25C unless otherwise noted
Electrical Characteristics
Attribute Voltage Range dV/dt Quiescent Power No Load Power Dissipation Inrush Current Peak DC Input Current K Factor Symbol VIN dVIN /dt PQ PNL IINR_P IIN_DC K POUT POUT_P VOUT IOUT ROUT ROUT ROUT COUT FSW FSW_RP VOUT_PP TON1 VIN = 270 VDC; See Figure 14 VIN = 240 - 330 VDC; See Figure 14 VIN = 270 VDC Average POUT < = 235 W, Tpeak < 5 ms See Page 11; No load Pout < = 235 W VIN = 270 V, POUT = 235 W VIN = 240 V to 330 V, POUT = 235 W VIN = 270 V, TJ = 100 C,POUT = 235 W 60 W < POUT < 235 W Max TJ = 25 C TJ = 125 C TJ = -55 C Conditions / Notes Min 240 Typ 270 395 2.5 Max 330 1 410 10 4 0.95 1/8 235 215 352.5 30 94.1 94 93.7 90 100 130 40 1.56 3.12 COUT = 0 F, POUT = 235 W, VIN = 270 V, See Page 15 VIN = 270 V, CPC = 0; See Figure 17 130 180 105 1.64 3.28 160 460 540 170 210 160 100 1.72 3.44 400 620 95.4 95.2 94.7 41.25 7.3 W W V A % % % m m m uF MHz MHz mV ms Unit Vdc V/s mW W A A
PC connected to -IN VIN = 240 to 330 V VIN = 330 V COUT = 100 F, POUT = 235 W POUT = 235 W
()
VOUT VIN
Output Power (Average) Output Power (Peak) Output Voltage Output Current (Average) Efficiency (Ambient) Efficiency (Hot) Minimum Efficiency (Over Load Range) Output Resistance (Ambient) Output Resistance (Hot) Output Resistance (Cold) Load Capacitance Switching Frequency Ripple Frequency Output Voltage Ripple VIN to VOUT (Application of VIN) PC PC Voltage (Operating) PC Voltage (Enable) PC Voltage (Disable) PC Source Current (Startup) PC Source Current (Operating) PC Internal Resistance PC Capacitance (Internal) PC Capacitance (External) External PC Resistance PC External Toggle Rate PC to VOUT with PC Released PC to VOUT, Disable PC
VPC VPC_EN VPC_DIS IPC_EN IPC_OP RPC_SNK CPC_INT CPC_EXT RPC FPC_TOG Ton2 TPC_DIS
4.7 2 50 2 50
5 2.5 100 3.5 150
Internal pull down resistor See Page 13 External capacitance delays PC enable time Connected to -VIN VIN = 270 V, Pre-applied CPC = 0, COUT = 0; See Figure 17 VIN = 270 V, Pre-applied CPC = 0, COUT = 0; See Figure 17
5.3 3 1.95 300 5 400 1000 1000 1
50
V V V uA mA k pF pF k Hz s s
50
100 4
150 10
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 3 of 17
SPECIFICATIONS (CONT.)
PRELIMINARY DATASHEET
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of -55C < TC < 100C (T-Grade); All other specifications are at TC = 25C unless otherwise noted
Electrical Characteristics (Continued)
Attribute TM TM accuracy TM Gain TM Source Current TM Internal Resistance External TM Capacitance TM Voltage Ripple PROTECTION Negative going OVLO Positive going OVLO Negative going UVLO Positive going UVLO Output Overcurrent Trip Short Circuit Protection Trip Current Short Circuit Protection Response Time Thermal Shutdown Junction setpoint GENERAL SPECIFICATION Isolation Voltage (hipot) Working Voltage (In - Out) Isolation Capacitance Isolation Resistance MTBF Agency Approvals/Standards Symbol Conditions / Notes Min Typ Max Unit
ACTM ATM ITM RTM_SNK CTM VTM_PP
-5 10 100 25 CTM = 0 F, VIN = 330 V, POUT = 235 W 200 40 400
+5
50 50 500
C mV/C uA k pF mV
VIN_OVLOVIN_OVLO+ VIN_UVLOVIN_UVLO+ IOCP ISCP TSCP TJ_OTP
VIN = 270 V, 25C
350 355 90 100 9 14 0.8 125
365 372 115 125 12
380 385 125 135 14
V V V V A A
1 130
1.2 135
us C
VHIPOT VWORKING CIN_OUT RIN_OUT
4242 Unpowered unit MIL HDBK 217F, 25 C, GB cTUVus CE Mark 500 10 660 4.2 500 800
V V pF M Mhrs
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 4 of 17
SPECIFICATIONS (CONT.)
All specifications are at TC = 25C unless otherwise noted. See associated figures for general trend data.
PRELIMINARY DATASHEET
Application Characteristics
Attribute No Load Power Inrush Current Peak Efficiency (Ambient) Efficiency (Hot - 100C) Output Resistance (-40C) Output Resistance (25C) Output Resistance (120C) Output Voltage Ripple VOUT Transient (Positive) VOUT Transient (Negative) Undervoltage Lockout Response Time Output Overcurrent Response Time Overvoltage Lockout Response Time TM Voltage (Ambient) Symbol PNL INR_P ROUT ROUT ROUT VOUT_PP VOUT_TRAN+ VOUT_TRANTUVLO TOCP TOVLO VTM_AMB TJ 27C 9 < IOCP < 14 A Conditions / Notes VIN = 270 V, PC enabled; See Figure 1 COUT = 100 F, POUT = 235 W VIN = 270 V, POUT = 235 W VIN = 270 V, POUT = 235 W VIN = 270 V VIN = 270 V VIN = 270 V COUT = 0 uF, POUT = 235 W @ VIN = 270, VIN = 270 V IOUT_STEP = 0 TO 7.3 A, ISLEW >10 A/us; See Figure 11 IOUT_STEP = 7.3 A to 0 A, ISLEW > 10 A/us; See Figure 12 Typ 5.5 2.5 95.4 94.7 105 130 180 160 1.4 1.3 150 5 120 3 Unit W A % % m m m mV V V us ms s V
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 5 of 17
SPECIFICATIONS (CONT.)
WAVEFORMS
No Load Power Dissipation vs Line
No Load Power Dissipation (W)
9 8 7 6 5 4 3 2 1 0 230 250 270 290 310 330
PRELIMINARY DATASHEET
Full Load Efficiency vs. Case Temperature
96.0 95.8
Efficiency (%)
95.6 95.4 95.2 95.0 94.8 94.6 94.4 94.2 -100 -50 0 50 100 150
Input Voltage (V)
TCASE: -55C 25C 100C VIN :
Case Temperature (C)
240 V 270 V 330 V
Figure 1 -- No load power dissipation vs. VIN; TCASE
Figure 2 -- Full load efficiency vs. temperature; VIN
Efficiency & Power Dissipation -55C Case
95 90
Efficiency & Power Dissipation vs. 25C Case
15
98
Power Dissipation (W)
Efficiency (%)
13
94
Efficiency (%)
PD
13 11 9 7 5
85 80
92 90 88 86 84 82
PD
11 9
75 70 65 0 1 2 3 4 5 6 7 8 7 5
80
0
1
2
3
4
5
6
7
8
3
Output Current (A)
VIN: 240 V 270 V 330 V 240 V 270 V 330 V
VIN: 240 V
Output Current (A)
270 V 330 V 240 V 270 V 330 V
Figure 3 -- Efficiency and power dissipation at -55C (case); VIN
Figure 4 -- Efficiency and power dissipation at 25C (case); VIN
Efficiency & Power Disspiation 100C Case
98
190
ROUT vs. Case Temperature
16.5
180
Power Dissipation (W)
96 94
14.5 12.5 10.5
170
Efficiency (%)
Rout (m)
92 90 88 86 84 82 80 0 1 2 3 4 5 6 7 8
160 150 140 130 120 110 100 90 -80 -60 -40 -20 0 20 40 60 80 100 120
PD
8.5 6.5 4.5 2.5
Output Current (A)
VIN: 240 V 270 V 330 V 240 V 270 V 330 V
Case Temperature (C)
I OUT : 0.73 A 7.3 A
Figure 5 -- Efficiency and power dissipation at 100C (case); VIN
Figure 6 -- ROUT vs. temperature vs. IOUT
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 6 of 17
Power Dissipation (W)
96
15
SPECIFICATIONS (CONT.)
WAVEFORMS (CONT.) Ripple vs. Load
180 160
PRELIMINARY DATASHEET
Ripple (mV pk-pk)
140 120 100 80 60 40 20 0 0 1 2 3 4 5 6 7 8
Load Current (A)
Vpk-pk (mV)
Figure 7 -- Vripple vs. IOUT ; 270 Vin, no external capacitance
Figure 8 -- PC to VOUT startup waveform
Figure 9 -- VIN to VOUT startup waveform
Figure 10 -- Output voltage and input current ripple, 270 Vin, 235 W no COUT
Figure 11 -- Positive load transient (0 - 7.3 A)
Figure 12 -- Negative load transient (7.3 A - 0 A)
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 7 of 17
SPECIFICATIONS (CONT.)
WAVEFORMS (CONT.)
PRELIMINARY DATASHEET
Safe Operating Area
400
Output Power (W)
350 300 250 200 150 100 50 0 29.00 31.00 33.00 35.00 37.00 39.00 41.00
Steady State
5 mS 352.5 W Ave
Figure 13 -- PC disable waveform, 270 VIN, 100 F COUT full load
Figure 14 -- Safe Operating Area vs. VOUT
400
350 330 300
50 mS operation full current
OVP
VDC
280 250
Normal Operating Range MIL-STD-704F Envelope of normal V transients for 270 Vdc systems
200 50 mS full current 1% duty 150 125 UVL 0 20 40 60 80 100 120 50% rated current
mS
Figure 15 -- Envelope of normal voltage transient for 270 volts DC system.
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 8 of 17
SPECIFICATIONS (CONT.)
All specifications are at TC = 25C unless otherwise noted. See associated figures for general trend data.
PRELIMINARY DATASHEET
Package / Mechanical Specifications
Attribute Length Width Height Weight Operating Temperature Storage Temperature Thermal Capacity Symbol L W H W TC TST OBA Thermal Impedance OBS Conditions / Notes Min Typ 48.6 / 1.91 27.7 / 1.09 9.5 / 0.37 1.10/31.3 Max Unit mm/in mm/in mm/in oz /g C C Ws /C C / W C / W C / W C / W
Baseplate temperature
-40 -65 23.8 7.7 2.9 0.4 0.36
100 125
Baseplate - Ambient Baseplate - Ambient 1000 LFM Baseplate - Sink Greased Baseplate - Thermal Pad
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 9 of 17
MECHANICAL DRAWINGS
PRELIMINARY DATASHEET
Baseplate - Slotted Flange
Heat Sink (Pin-fin)
Figure 16 -- Module outline
Figure 17 -- Pin-fin heat sink outline
Recommended PCB Pattern (Component side shown)
Figure 18 -- PCB mounting specifications
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 10 of 17
EFFICIENCY / DISSIPATION
Power, Voltage, Efficiency Relationships
Because of the high frequency, fully resonant SAC topology, power dissipation and overall conversion efficiency of BCM converters can be estimated as shown below. Key relationships to be considered are the following: 1. Transfer Function a. No load condition VOUT = VIN * K Where K (transformer turns ratio) is constant for each part number b. Loaded condition VOUT = Vin * K - IOUT * ROUT 2. Dissipated Power The two main terms of power losses in the BCM module are: - No load power dissipation (PNL) defined as the power used to power up the module with an enabled power train at no load. - Resistive loss (ROUT) refers to the power loss across the BCM modeled as pure resistive impedance. PDISSIPATED ~ PNL + PR ~ OUT Eq. 3 Eq. 2 Eq. 1
PRELIMINARY DATASHEET
INPUT POWER
OUTPUT POWER
P R OUT P NL
Figure 19 -- Power transfer diagram
Therefore, with reference to the diagram shown in Figure 16 POUT = PIN - PDISSIPATED = PIN - PNL - PROUT Eq. 4
Notice that ROUT is temperature and input voltage dependent and PNL is temperature dependent (See Figure 16).
The above relations can be combined to calculate the overall module efficiency:
=
POUT PIN
=
PIN - PNL - PROUT PIN
=
VIN * IIN - PNL - (IOUT)2 * ROUT VIN * IIN
=
1-
(
PNL + (IOUT)2 * ROUT VIN * IIN
)
Eq. 5
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 11 of 17
TIMING DIAGRAM
Figure 20 - Timing diagram
1 2 3 5 4 6
Bus Converter Module
C B
VOVLO+ VOVLO-
VIN
NL
VUVLO+ VUVLO-
PC
5V 3V
MC270A330M024FP
G D A E F
3V
5V 2.5 V
C 500mS before retrial
Vout
LL * K
vicorpower.com
IOUT ISSP IOCP
H
TM
3 V @ 27C
0.4 V
PRELIMINARY DATASHEET
Rev. 1.0
Notes:
A: TON1 B: TOVLO* C: Max recovery time D:TUVLO
E: TON2 F: TOCP G: TPC-DIS H: TSSP**
1: Controller start 2: Controller turn off 3: PC release
4: PC pulled low 5: PC released on output SC 6: SC removed
- Timing and voltage is not to scale - Error pulse width is load dependent
*Min value switching off **From detection of error to power train shutdown
Page 12 of 17
CONTROL FUNCTIONS / FUSING
Using the Control Signals TM and PC
The PC control pin can be used to accomplish the following functions: * Delayed start: At start-up, PC pin will source a constant 100 uA current to the internal RC network. Adding an external capacitor will allow further delay in reaching the 2.5 V threshold for module start. * Synchronized start up: In a parallel module array, PC pins shall be connected in order to ensure synchronous start of all the units. While every controller has a calibrated 2.5 V reference on PC comparator, many factors might cause different timing in turning on the 100 uA current source on each module, i.e.: - Different VIN slew rate - Statistical component value distribution By connecting all PC pins, the charging transient will be shared and all the modules will be enabled synchronously. * Auxiliary voltage source: Once enabled in regular operational conditions (no fault), each BCM PC provides a regulated 5 V, 2 mA voltage source. * Output Disable: PC pin can be actively pulled down in order to disable module operations. Pull down impedance shall be lower than 850 and toggle rate lower than 1 Hz. * Fault detection flag: The PC 5 V voltage source is internally turned off as soon as a fault is detected. After a minimum disable time, the module tries to re-start, and PC voltage is re-enabled. For system monitoring purposes (microcontroller interface) faults are detected on falling edges of PC signal. It is important to notice that PC doesn't have current sink capability (only 150 k typical pull down is present), therefore, in an array, PC line will not be capable of disabling all the modules if a fault occurs on one of them. The temperature monitor (TM) pin provides a voltage proportional to the absolute temperature of the converter control IC. It can be used to accomplish the following functions: * Monitor the control IC temperature: The temperature in Kelvin is equal to the voltage on the TM pin scaled by x100. (i.e. 3.0 V = 300 K = 27C). It is important to remember that VI BRICKs are multi-chip modules, whose temperature distribution greatly vary for each part number as well with input/output conditions, thermal management and environmental conditions. Therefore, TM cannot be used to thermally protect the system. * Fault detection flag: The TM voltage source is internally turned off as soon as a fault is detected. After a minimum disable time, the module tries to re-start, and TM voltage is re-enabled.
PRELIMINARY DATASHEET
Fuse Selection
VI BRICKs are not internally fused in order to provide flexibility in configuring power systems. Input line fusing of VI BRICKs is recommended at system level, in order to provide thermal protection in case of catastrophic failure. The fuse shall be selected by closely matching system requirements with the following characteristics: * Current rating (usually greater than maximum BCM current) * Maximum voltage rating (usually greater than the maximum possible input voltage) * Ambient temperature * Nominal melting I2t * Recommended fuse: 2.5 A Bussmann PC-Tron or SOC type 36CFA.
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 13 of 17
APPLICATION NOTES
Current Sharing
The SAC topology bases its performance on efficient transfer of energy through a transformer, without the need of closed loop control. For this reason, the transfer characteristic can be approximated by an ideal transformer with some resistive drop and positive temperature coefficient. This type of characteristic is close to the impedance characteristic of a DC power distribution system, both in behavior (AC dynamic) and absolute value (DC dynamic). When connected in an array (with same K factor), the BCM module will inherently share the load current with parallel units, according to the equivalent impedance divider that the system implements from the power source to the point of load.
PRELIMINARY DATASHEET
It is important to notice that, when successfully started, BCMs are capable of bidirectional operations (reverse power transfer is enabled if the BCM input falls within its operating range and the BCM is otherwise enabled). In parallel arrays, because of the resistive behavior, circulating currents are never experienced (energy conservation law). General recommendations to achieve matched array impedances are (see also AN016 for further details): * to dedicate common copper planes within the PCB to deliver and return the current to the modules * to make the PCB layout as symmetric as possible * to apply same input/output filters (if present) to each unit
Figure 21 - BCM Array
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 14 of 17
APPLICATION NOTES (CONT.)
Input and Output Filter Design
A major advantage of SAC systems versus conventional PWM converters is that the transformers do not require large functional filters. The resonant LC tank, operated at extreme high frequency, is amplitude modulated as a function of input voltage and output current, and efficiently transfers charge through the isolation transformer. A small amount of capacitance, embedded in the input and output stages of the module, is sufficient for full functionality and is key to achieve power density. This paradigm shift requires system design to carefully evaluate external filters in order to: 1. Guarantee low source impedance: To take full advantage of the BCM dynamic response, the impedance presented to its input terminals must be low from DC to approximately 5 MHz. The connection of the VI BRICK to its power source should be implemented with minimal distribution inductance. If the interconnect inductance exceeds 100 nH, the input should be bypassed with a RC damper to retain low source impedance and stable operation. With an interconnect inductance of 200 nH, the RC damper may be as high as 1 F in series with 0.3 . A single electrolytic or equivalent low-Q capacitor may be used in place of the series RC bypass. 2. Further reduce input and/or output voltage ripple without sacrificing dynamic response: Given the wide bandwidth of the BCM, the source response is generally the limiting factor in the overall system response. Anomalies in the response of the source will appear at the output of the BCM multiplied by its K factor. This is illustrated in Figures 11 and 12. 3. Protect the module from overvoltage transients imposed by the system that would exceed maximum ratings and cause failures: The VI BRICK input/output voltage ranges shall not be exceeded. An internal overvoltage lockout function prevents operation outside of the normal operating input range. Even during this condition, the powertrain is exposed to the applied voltage and power MOSFETs must withstand it. A criterion for protection is the maximum amount of energy that the input or output switches can tolerate if avalanched.
PRELIMINARY DATASHEET
Total load capacitance at the output of the BCM shall not exceed the specified maximum. Owing to the wide bandwidth and low output impedance of the BCM, low frequency bypass capacitance and significant energy storage may be more densely and efficiently provided by adding capacitance at the input of the BCM. At frequencies <500 kHz the BCM appears as an impedance of ROUT between the source and load. Within this frequency range capacitance at the input appears as effective capacitance on the output per the relationship defined in Eq. 5.
COUT =
CIN K2
Eq. 6
This enables a reduction in the size and number of capacitors used in a typical system.
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
Page 15 of 17
APPLICATION NOTES (CONT.)
Bus Converter Module
Wake-Up Power and Logic Lp1 Power Transformer Q1 Lr Q5 Ls1 Q2 Ls2 C2 Primary Stage & Resonant Tank Cr Q7 COUT Primary Gate Drive C1 Synchronous Rectification
+Vin
Figure 22 -- BCM block diagram
+Vout
18.5 V
C3 Lp2 Q6 Q3 Cr Lr C4 Q4 Q8
MC270A330M024FP
Gate Drive Supply
One shot delay
320/540 ms
-Vout
-Vin
Modulator
Enable
Secondary Gate Drive
vicorpower.com
Adaptive Soft Start
100 A
PC Pull-Up & Source
VIN Primary Current Sensing
CS2
2.5 V 2 mA
1.5 k
5V
UVLO OVLO
2.50 V
Fast current limit Vref
Over-Current Protection
Start up & Fault Logic
PC
150 K
1000 pF
Slow current limit
2.5 V
PRELIMINARY DATASHEET
Rev. 1.0
TM
Temperature dependent voltage source Over Temperature Protection Vref (125C)
40 K
Page 16 of 17
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. The products described on this data sheet are protected by the following U.S. Patents Numbers: 5,945,130; 6,403,009; 6,710,257; 6,911,848; 6,930,893; 6,934,166; 6,940,013; 6,969,909; 7,038,917; 7,166,898; 7,187,263; 7,361,844; D496,906; D505,114; D506,438; D509,472; and for use under 6,975,098 and 6,984,965
Vicor Corporation 25 Frontage Road Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715 email Customer Service: custserv@vicorpower.com Technical Support: apps@vicorpower.com
Bus Converter Module
MC270A330M024FP
vicorpower.com
Rev. 1.0
7/09

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