Ripple Attenuator Modules VI-RAMTM/VE-RAMTM Ripple Attenuator Modules Features & Benefits * RoHS compliant (VE versions) * Reduces output ripple to <3mVp-p * Compatible with any VI-200/VI-J00 based product: 5 to 50VDC output * Full attenuation up to 20A * No adjustments required * 93 - 99% efficiency * Converter sense, trim, overvoltage and overcurrent retained * Size: 2.28" x 2.4" x 0.5" (57,9 x 61,0 x 12,7 mm) * CE Mark Product Highlights Ripple attenuator modules may be connected to VI-200 or VI-J00 converters, FlatPACs, ComPACs or MegaModules, with output voltages from 5 - 50V, to limit output noise to less than 3mV peak-to-peak at loads up to 20A. Combining active and passive filtering, the VI-RAM attenuates both low frequency input power source fundamental and harmonics, as well as high frequency switching components in the frequency range of DC to 20MHz, while exhibiting efficiencies of 93-99%. No adjustments are required, and remote sense and output voltage trim features are retained. A member of Vicor's high-power density, high performance, component-level power building blocks, the VI-RAM offers the power systems architect a single, flexible, component-level solution to almost any "clean power" problem. At the same time, the VI-RAM eliminates the space, efficiency, and weight penalties associated with linear power sources, and the stability, efficiency, and adjustment penalties associated with external "add on" filters for conventional switchers. VI-RAMTM/VE-RAMTM Page 1 of 4 VI-RAM Specifications Parameter Min. Typ.Max. Remarks Output Noise & Ripple VI-200 3mVp-p From 10% of full rated VI-J00 10mVp-p output current of the source converter to full load Input Voltage Range 5VDC50VDC Output Voltage Deviation 0.5% From the output voltage of the VI-200 source to which the VI-RAM will be connected Full Load Current 10A E1, C1, I1 or M1 20A E2, C2, I2 or M2 Overload Current 30A At max. operating baseplate temperature DC Voltage Drop 0.34VDC0.41VDC Up to 10A 0.34VDC0.44VDC Up to 20A 0.34VDC0.75VDC Up to 30A (overload) Dissipation = (DC voltage drop) x (Load current + 15mA) Isolation500VRMS Input/Output to baseplate Size 2.28" x 2.4" x 0.5" SlimMod and FinMod (57,9 x 61,0 x 12,7) packages available Weight E,C-Grade 3.0(85) Ounces(Grams) I,M-Grade 3.6(102) 3.7(105) 3.8(107) Electrical Considerations Transient Response and Dynamic Range: Full rated noise attenuation will be maintained at the VI-RAM output for step load changes up to 10% of the rated output current of the source converter, with the VI-RAMexhibiting an underdamped output excursion of less than 10mVp-p. Some degradation in noise attenuation during the transient response period following the step may be exhibited for larger load changes. Adding output capacitance to the VI-RAM will improve the rejection over a larger dynamic range. Sense Connection: Sense -IN and Sense -OUT connections are provided on the VI-RAM. Sense -IN connections must be connected to the corresponding sense connections on the Vicor converter. Sense -OUT pins on the VI-RAM must be connected between the VI-RAM power-output pins and the point of load. Output Load Characteristics: When used in combination with Vicor DC-DC converters, and with sense leads connected, the VI-RAM will be stable for any non-inductive load. DC Voltage Drop: Below full load, the input to output DC Voltage Drop is controlled to be an essentially constant voltage which appears between the -IN and -OUT terminals. In overload the DC voltage drop will rise as current increases. A few tens of millivolts appears between the +IN and +OUT terminals. Care should be taken not to connect IN and OUT terminals (i.e. through scope probe returns, grounds, etc.), as attenuation will be adversely affected. Product Grade Specifications Parameter (Up to 10A) VI-RAM-E1 (Up to 20A) VI-RAM-E2 Storage Temp. -20C to +105C Operating Temp. -10C to +100 (Baseplate) Rev 1.8 06/2017 VI-RAM-C1 VI-RAM-C2 -40C to +105C VI-RAM-I1 VI-RAM-I2 -55C to +105C VI-RAM-M1 VI-RAM-M2 -65C to +105C -25C to +100C -40C to +100C -55C to +100C vicorpower.com 800 927.9474 VI-RAMTM/VE-RAMTM Comparison of Input to Output Ripple (Typical) Attenuation vs. Frequency (Typical) 25db 30db 35db 40db Attenuation Input to the converter 10V/cm 45db 50db 55db 60db 10Hz 100Hz 1KHz 10KHz 100KHz 1MHz Frequency Output from the RAM 20mV/cm Recommended Connection Diagram .01F + .01F L1 + IN C1 - Gate IN + IN +OUT VI-200 Gate OUT - In +S + S IN -S - S IN Trim -OUT +OUT + S OUT VI-RAM + 220F - IN N/C - S OUT -OUT 0.22F Load .01F .01F For important application information please refer to the Design Guide and Applications Manual for VI-200 and VI-J00 Family. VI-RAMTM/VE-RAMTM Page 2 of 4 Rev 1.8 06/2017 vicorpower.com 800 927.9474 10MHz VI-RAMTM/VE-RAMTM Storage Vicor products, when not installed in customer units, should be stored in ESD safe packaging in accordance with ANSI/ESD S20.20, "Protection of Electrical and Electronic Parts, Assemblies and Equipment" and should be maintained in a temperature controlled factory/ warehouse environment not exposed to outside elements controlled between the temperature ranges of 15C and 38C. Humidity shall not be condensing, no minimum humidity when stored in an ESD compliant package. VI-RAM Mechanical Diagram Mechanical Drawing 2.28 (57,9) 0.49 (12,4) 0.300.015 (7,6)(0,38) Standard 0.080 Dia (2) places Solder plate over copper alloy 1.30 (33,0) 0.65 (16,5) RoHS 0.080 Dia (2) places Matte tin over copper alloy Pin # 2.10 (53,4) 4 9 3 8 2 VI-RAM 1 .15 (3,8) 1 2 7 6 5 .70 .40 (17,8) (10,2) FULL R .15 (3,8) 1.90 (48,3) +Sense IN 3 -Sense IN 4 -IN 5 +OUT 6 7 .35 .015 (8,9)(0,38) +IN +Sense NC 8 -Sense 9 -OUT Standard RoHS 0.040 (1,0) Dia (7) places Solder plate over copper alloy 0.040 (1,0) Dia (7) places Matte tin over copper alloy Product ID this surface 2.40 (61,0) .30 (7,6) Min. 0.22 (5,6) Min. .50 (12,7) 1.75 Max. (44,4) +.030 (0,76) -.000 (0,00) .01 .12 (3,0) VI-RAMTM/VE-RAMTM Page 3 of 4 1.40 1.00 (35,6) (25,4) Function Aluminum Base Rev 1.8 06/2017 vicorpower.com 800 927.9474 VI-RAMTM/VE-RAMTM 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 makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves the right to make changes to any products, specifications, and product descriptions at any time without notice. Information published by Vicor has been checked and is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies. Testing and other quality controls are used to the extent Vicor deems necessary to support Vicor's product warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. Specifications are subject to change without notice. Visit http://www.vicorpower.com/ram for the latest product information. Vicor's Standard Terms and Conditions and Product Warranty All sales are subject to Vicor's Standard Terms and Conditions of Sale, and Product Warranty which are available on Vicor's webpage (http://www.vicorpower.com/termsconditionswarranty) or upon request. Life Support Policy VICOR'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used herein, life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms and Conditions of Sale, the user of Vicor products and components in life support applications assumes all risks of such use and indemnifies Vicor against all liability and damages. 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. No license, whether express, implied, or arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Interested parties should contact Vicor's Intellectual Property Department. 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 VI-RAMTM/VE-RAMTM Page 4 of 4 Rev 1.8 06/2017 vicorpower.com 800 927.9474