Data Sheet MI-RAM™ Ripple Attenuator Modules Features • • • • • • • • Reduces output PARD to ≤10 mV pp Full attenuation up to 20 A load No adjustments required Compatible with all MI-Family converters from 5 to 50 Vdc output Efficiency: 93% – 99% Converter sense, trim, OVP & OCP retained MIL-STD-810 environments Size: 2.28” x 2.4” x 0.5” (57,9 x 61,0 x 12,7 mm) Product Highlights The MI-RAM is designed for applications where extremely low noise outputs are required. When used with any Vicor MI-Family DC-DC converter, the MI-RAM reduces both line frequency related ripple and switching noise to less than or equal to 10 mV p-p, DC to 20 MHz. The combination of the MI-RAM with an MI-Family converter provides the output noise performance of a linear supply at a power density in excess of 15 W/in3. All of the features of the MI-Family converter remain available while using the MI-RAM, including output voltage trimming, OVP and OTP (MI-200 only), current limiting, remote sense, and output inhibit. Full encapsulation in a low profile package enables the MI-RAM to meet MIL-STD-810 environmental testing requirements. MI-RAM Specifications (typical at TBP = 25°C, nominal line, 75% load unless otherwise specified) Parameter Min. Typ. 2.0 6.0 Max. Units 3.0 mV pp Output noise and ripple 10.0 mV pp Input voltage range 5.0 50 Vdc Output voltage accuracy 99.5 100.5 % 10 A Full load current 20 A DC voltage drop 0.34 0.38 Dissipation = (DC voltage drop x load current) + (Vin x 15 mA) Isolation 250 Vrms 3.6 3.7 3.8 ounces Weight 102 105 107 grams Notes MI-200; 10% to 100% load MI-J00; 10% to 100% load Of MI source converter MI-RAM-I1 and MI-RAM-M1 MI-RAM-I2 and MI-RAM-M2 10% to full load Input / output to baseplate Electrical Considerations Transient Response and Dynamic Range: Full rated noise attenuation will be maintained at the MI-RAM output for step load changes up to 10% of the rated output current of the source converter, with the MI-RAM exhibiting an underdamped output excursion of less than 10 mV pp. 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 MI-RAM will improve the rejection over a larger dynamic range. Sense Connection: Sense-in and sense-out connections are provided on the MI-RAM. Sense-in connections must be connected to the corresponding sense connections on the Vicor converter. Sense-out pins on the MI-RAM must be connected between the MI-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 MI-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 Packaging Options Standard: Slotted baseplate SlimMod: Flangeless baseplate, option suffix: - S Example: MI - RAM - M1 - S FinMod: Finned heat sink, option suffix: - F1, - F2, -F3 or -F4 Examples: MI - RAM - M1 -F1, 0.25" fins, longitudinal MI - RAM - M1 -F2, 0.50" fins, longitudinal MI - RAM - M1 -F3, 0.25" fins, transverse MI - RAM - M1 -F4, 0.50" fins, transverse 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. Part Numbering MI Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 - RAM Ripple Attenuator Module - M - Product Grade Temperatures (°C) Grade Operating Storage I = - 40 to + 100 - 55 to + 125 M = - 55 to + 100 - 65 to + 125 MI-RAM Ripple Attenuator Modules Set your site on VICOR at vicorpower.com Rev. 1.1 2 Current Rating 1 = Up to 10 A 2 = Up to 20 A Page 1 of 5 SPECIFICATIONS PRODUCT GRADE SPECIFICATIONS Parameter I-Grade M-Grade Storage temperature -55°C to +125°C -65°C to +125°C Operating temperature (baseplate) -40°C to +100°C -55°C to +100°C 12 hours, 29 cycles 96 hours, 213 cycles 12 cycles -65°C to +100°C 12 cycles -65°C to +100°C -40°C, +80°C -55°C, +80°C 2 years 2 years MIL-STD-810 MIL-STD-810 NAVMAT P-4855-1A NAVMAT P-4855-1A Power cycling burn-in Temperature cycled with power off 17°C per minute rate of change Test data supplied at these temperatures [a] Warranty Environmental compliance Derating [a] Test data available for review or download from vicorpower.com ENVIRONMENTAL QUALIFICATIONS Parameter Qualification MIL-STD-810D, Method 500.2, Procedure III, explosive decompression (40 K ft.). Altitude MIL-STD-810D, Method 500.2, Procedure II, 40,000 ft., 1000 – 1500 ft./ min. to 70,000 ft., unit functioning Explosive Atmosphere MIL-STD-810C, Method 511.1, Procedure I MIL-STD-810D, Method 514.3, Procedure I, category 6, helicopter, 20 g Vibration MIL-STD-810D, Method 514.3 random: 10 – 300 Hz @ 0.02 g 2 /Hz, 2000 Hz @ 0.002 g 2 / Hz, 3.9 total G rms 3 hrs / axis. Sine: 30 Hz @ 20 g, 60 Hz @ 10 g, 90 Hz @ 6.6 g, 120 Hz @ 5.0 g, 16.0 total G rms, 3 axes MIL-STD-810E, Method 514.4, Table 514.4-VII, ±6 db/ octave, 7.7 G rms, 1hr/ axis MIL-STD-810D, Method 516.3, Procedure I, functional shock, 40 g MIL-STD-202F, Method 213B, 18 pulses, 60 g, 9 msec Shock MIL-STD-202F, Method 213B, 75 g, 11 ms saw tooth shock MIL-STD-202F, Method 207A, 3 impacts / axis, 1, 3, 5 feet Acceleration MIL-STD-810D, Method 513.3, Procedure II Operational test, 9 g for 1 minute along 3 mutually perpendicular axes Humidity MIL-STD-810D, Method 507.2, Procedure I, cycle I, 240 hrs, 88% relative humidity Solder Test MIL-STD-202, Method 208, 8 hr. aging Fungus MIL-STD-810C, Method 508.1 Salt-Fog MIL-STD-810C, Method 509.1 Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 MI-RAM Ripple Attenuator Modules Set your site on VICOR at vicorpower.com Rev. 1.1 Page 2 of 5 25 db 30 db Attenuation 35 db Output from the RAM 20 mV/cm 40 db 45 db 50 db 55 db 60 db 10 Hz 100 Hz 1 KHz 10 KHz 100 KHz 1 MHz 10 MHz Frequency Input to the converter 10 V/cm Figure 1 — Figure 2 — Attenuation vs. frequency (typical) .01µF .01µF + L1 + In Gate In C1 + S In +S VI-200 MI-200 Gate Out – + In + Out – In MI-RAM VI-RAM N/C Trim –S – Out + Out + S Out + 220µF – S In – In 0.22µF Load – S Out – Out .01µF .01µF Figure 3 — Connection diagram Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 MI-RAM Ripple Attenuator Modules Set your site on VICOR at vicorpower.com Rev. 1.1 Page 3 of 5 MECHANICAL DRAWING 2.28 (57,9) in (mm) 0.49 (12,4) 0.30±0.015 (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 # 4 9 3 8 2.10 (53,4) MI-RAM VI-RAM 7 2 6 1 5 FULL R .15 (3,8) .15 (3,8) 1.90 (48,3) .70 .40 (17,8) (10,2) 1.40 1.00 (35,6) (25,4) .35± .015 (8,9)±(0,38) Function 1 +In 2 +Sense In 3 –Sense In 4 –In 5 +Out 6 +Sense 7 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) Aluminum Base Figure 4 — Mechanical drawing Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 MI-RAM Ripple Attenuator Modules Set your site on VICOR at vicorpower.com Rev. 1.1 Page 4 of 5 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 Fax: 978-475-6715 email Customer Service: [email protected] Technical Support: [email protected] Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 MI-RAM Ripple Attenuator Modules Set your site on VICOR at vicorpower.com Rev. 1.1 11/08