RAM – Ripple Attenuator Module

Power Supply Output Filter for 5 - 50 Vdc Input up to 20 A

Description

Ripple attenuator modules (RAM) may be connected to VI-200 or VI-J00 converters, FlatPACs, ComPACs, or MegaMods, with output voltages from 5 – 50 volts, to limit total output noise to less than 3 mV peak-to-peak at loads up to 20 amps. Combining active and passive filtering, the RAM attenuates both low frequency input power source 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.

The RAM offers power systems architects a single, flexible, component-level solution to almost any clean power problem. It also 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.

Specifications

Input Voltage:
  • 5 – 50 Vdc
Full Attenuation:
  • Up to 20 A
Efficiency:
  • 93 – 99%
Dimensions(half brick):
  • 2.28″ x 2.4″ x 0.5″(57,9 x 61,0 x 12,7 mm)

Features

  • 10 A and 20 A models
  • Reduces output ripple to <3 mV pp (VI-200)
  • Compatible with any VI-200 / VI-J00 based product with a 5 – 50 Vdc output
  • No adjustments required
  • Converter sense, trim, overvoltage and overcurrent retained

Data Sheets

Application Notes

Design Guides / Manuals

Download Entire Manual

Download Individual Chapters

  1. Zero-Current Switching
  2. DC-DC Converter Pinouts
  3. Module Dos and Donts
  4. Overcurrent Protection
  5. Output Voltage Trimming
  6. Multiple Gate In Connections
  7. Applications Circuits / Converter Array Design Considerations
  8. Using Boosters and Parallel Arrays
  9. EMC Considerations
  10. Optional Output Filters
  11. Battery Charger (BatMod)

Filter and Front-End Module Chapters

  1. AC Input Module (AIM / MI-AIM)
  2. Harmonic Attenuator Module (HAM)
  3. Input Attenuator Module (IAM / MI-IAM)
  4. Ripple Attenuator Module (RAM / MI-RAM)
  5. Offline Front End

Power System Chapters

  1. DC Input Power System (ComPAC / MI-ComPAC Family)
  2. AC Input Power System (FlatPAC Family)
  3. AC Input Power System (PFC FlatPAC)

General Chapters

  1. Thermal and Module Mounting Considerations
  2. Thermal Curves
  3. Lead Free Pins (RoHS)
  4. Tin Lead Pins
  5. Module Packaging Options (SlimMod, FinMod, BusMod and MegaMod Families)
  6. Product Weights
  7. Glossary of Technical Terms

Safety Approvals

  • CE Marked – Low Voltage Directive (2006/95/EC)

Mechanical Drawings

2-D Half-Size VI-J00 / VE-J00 DC-DC Converter Module Drawings
Drwg. Number Description Download RoHS
03550 Outline drawing for half-size VI-J00 / VE-J00 DC-DC converter DXF | PDF
3-D Half-Size VI-J00 / VE-J00 Module (referring to drawing number 03550)
Non-RoHS, VI-J00 series STEP | 3D PDF
RoHS, VI-J00 series STEP | 3D PDF

Design Calculators

Thermal Calculators

This is a downloadable Excel file.

BusMod

Terminal block for VI-J00-size modules
Description P/N RoHS Technical Drawing
Rugged chassis-mount housing for VI-J00-size module
(add-B1 suffix to module number for preinstalled)		 18952 PDF | DXF

EMI Shielding

Description P/N RoHS Technical Drawing
VI-J00-size Shield with Pem Nuts 32184 PDF | DXF

Sockets & Standoffs

Sockets
Description Pin Size P/N RoHS Technical Drawing
Electro-tin finish 0.040″ 30074 PDF | DXF
Electro-tin finish 0.080″ 30075 PDF | DXF
Standoffs
Description P/N RoHS Technical Drawing
Six 0.25″ x 0.525 Long Female, 0.25″ Hex 32183-01 PDF | DXF

Thermal Management

Heat sinks used with Vicor’s VI-J00-size module (not Mini modules)
Description P/N RoHS Technical Drawing
0.90″ Longitudinal Fins 30191 PDF | DXF
0.90″ Transverse Fins 30771 PDF | DXF
0.40″ Transverse Fins 30140 PDF | DXF
Heat Sink Thermal Data and Calculator
ThermMate Thermal Pads (10 pieces per package)
Description Thickness P/N RoHS Technical Drawing
For use with Vicor VI-J00 moduels only
(not Mini modules)		 0.007″ 20264 PDF | DXF
Grounding Clips
Description P/N RoHS Technical Drawing
For use with FinMod, Longitudinal 0.25″ Fins (-F1) 32185 PDF | DXF
For use with FinMod, Longitudinal 0.50″ Fins (-F2) 32185 PDF | DXF
For use with FinMod, Transverse 0.25″ Fins (-F3) 32186 PDF | DXF
For use with FinMod, Transverse 0.50″ Fins (-F4) 32186 PDF | DXF
For use with SlimMod Flangless package (-S) 32187 PDF | DXF