PRELIMINARY
Application Note (continued)
Input Impedance Recommendations
Input Fuse Recommendations
To take full advantage of the BCM capabilities, the impedance
presented to its input terminals must be low from DC to
approximately 5 MHz. The source should exhibit low inductance
(less than 100 nH) and should have a critically damped response.
If the interconnect inductance exceeds 100 nH, the BCM input
pins should be bypassed with an RC damper (e.g., 8 µF in series
with 0.3 ohm) to retain low source impedance and stable
operations. Given the wide bandwidth of the BCM, the source
response is generally the limiting factor in the overall system
response.
V•I Chips are not internally fused in order to provide flexibility
in power system configuration. However, input line fusing of V•I
Chips must always be incorporated within the power system.
A fast acting fuse, such as NANO2 FUSE 451 Series 7 A 125 V,
is required to meet safety agency Conditions of Acceptability.
The input line fuse should be placed in series with the +IN port.
Anomalies in the response of the source will appear at the output
of the BCM multiplied by its K factor. The DC resistance of the
source should be kept as low as possible to minimize voltage
deviations. This is especially important if the BCM is operated
near low or high line as the over/under voltage detection circuitry
could be activated.
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 Corporation
Tel: 800-735-6200
vicorpower.com
V•I Chip Bus Converter
B048K120T10
Rev. 1.2
Page 15 of 16
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