vicorpower.com

800-735-6200

V•I Chip Voltage Transformation Module

V048F040T050

Rev. 1.1

Page 12 of 13

V•I Chip Voltage Transformation Module

PRELIMINARY

Input Impedance Recommendations

To take full advantage of the VTM’s capabilities, the impedance of the

source (input source plus the PC board impedance) must be low over a

range from DC to 5 MHz. The input of the VTM (factorized bus) should be

locally bypassed with a 8 µF low Q aluminum electrolytic capacitor.

Additional input capacitance may be added to improve transient

performance or compensate for high source impedance. The VTM has

extremely wide bandwidth so the source response to transients is usually

the limiting factor in overall output response of the VTM.

Anomalies in the response of the source will appear at the output of the

VTM, multiplied by its K factor of 1/12. The DC resistance of the source

should be kept as low as possible to minimize voltage deviations on the

input to the VTM. If the VTM is going to be operating close to the high

limit of its input range, make sure input voltage deviations will not trigger

the input overvoltage turn-off threshold.

Input Fuse Recommendations

V•I Chips are not internally fused in order to provide flexibility in

configuring power systems. However, input line fusing of V•I Chips must

always be incorporated within the power system. A fast acting fuse is

required to meet safety agency Conditions of Acceptability. The input line

fuse should be placed in series with the +In port.

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.