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| 12 1-800-735-6200 VI-RAMTM Ripple Attenuator Modules VI-RAM Specifications (typical at TBP = 25C, nominal line, 75% load unless otherwise specified) Parameter Output Noise & Ripple VI-200 VI-J00 Input Voltage Range Output Voltage Deviation Min. Typ. Max. 3 mV pp 10 mV pp 5 Vdc 0.5% 50 Vdc Remarks From 10% of full rated output current of the source converter to full load Features s Reduces Output Ripple to <3 mV pp s Compatible with any VI-200/VI-J00based Product: 5 to 50Vdc Output s Full Attenuation Up to 20A s No Adjustments Required s 93-99% Efficiency s Converter Sense, Trim, Overvoltage and Overcurrent Retained s Size: 2.28" x 2.4" x 0.5" (57,9 x 61,0 x 12,7) s CE Marked Product Highlights Ripple attenuator modules may be connected to VI-200 or VI-J00 converters, FlatPACs, MegaPACs, MasterModules or MegaModules, with output voltages from 5 to 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, and high frequency switching components in the frequency range of DC to 20 MHz, 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. From the output voltage of the VI-200 source to which the VI-RAM will be connected Full Load Current 10Amps E1, C1, I1 or M1 20Amps E2, C2, I2 or M2 Overload Current 30Amps At max. allowable baseplate temperature DC Voltage Drop 0.34 0.41 Up to 10Amps 0.34 0.44 Up to 20Amps 0.34 0.75 Up to 30Amps (overload) Dissipation = (DC voltage drop) x (Load current + 15 mA) Isolation 500VRMS 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 3.0 Ounces (85 Grams) 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-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 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) VI-RAM-C1 VI-RAM-I1 VI-RAM-C2 VI-RAM-I2 -40C to +105C -55C to +105C -25C to +100C -40C to +100C VI-RAM-M1 VI-RAM-M2 -65C to +105C -55C to +100C 12 1-800-735-6200 25 db 30 db 35 db Attenuation 40 db 45 db 50 db 55 db 60 db 10 Hz 100 Hz 1 KHz 10 KHz Frequency 100 KHz 1 MHz 10 MHz Attenuation vs. Frequency (typical) Input to the converter 10 V/cm Output from the RAM 20 mV/cm Connection Diagram .01uF .01uF L1 + - + In Gate In Gate Out - In + Out +S + In + S In + Out + S Out N/C Load VI-200 Trim -S - Out .01uF VI-RAM - S In - In - S Out - Out .01uF Mechanical Drawing 2.28 (57,9) .49 (12,4) .30 (7,6) .015 (0,38) 1.30 (33,0) .65 (16,5) .080 Dia (2) places Solder plate over copper alloy Pin # 1 4 3 2.10 (53,4) 2 1 9 8 2 3 1.40 1.00 (35,6) (25,4) 4 5 6 .35 (8,9) .015 (0,38) 7 8 9 .15 (3,8) FULL R .15 (3,8) .040 (1,0) Dia (7) places Solder plate over copper alloy Product ID this surface 1.90 (48,3) .22 (5,6) Min. .30 (7,6) Min. Function +In +Sense In -Sense In -In +Out +Sense NC -Sense -Out VI-RAM 7 6 5 .70 .40 (17,8) (10,2) 2.40 (61,0) 1.75 (44,4) Max. .50 (12,7) +.030 (0,76) -.000 (0) .01 .12 (3,0) Aluminum Base |
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