URAM2T23 Vicor Corporation, URAM2T23 Datasheet

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URAM2T23

Manufacturer Part Number
URAM2T23
Description
20A; inputV:3-30V; 7.5W; MicroRAM: output ripple attenuator module
Manufacturer
Vicor Corporation
Datasheet
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
• RoHS Compliant (with F or G pin option)
• > 40 dB ripple attenuation from
• Integrated OR’ing diode supports
• Significantly improves load
• Efficiency up to 98%
• User selectable performance optimization
• Combined active and passive filtering
• 3 – 30 Vdc input range
• 20 and 30 Ampere ratings
Vicor’s MicroRAM output ripple attenuation
module combines both active and passive
filtering to achieve greater than 40 dB of
noise attenuation from 60 Hz to 1 Mhz. The
MicroRAM operates over a range of 3 to
30 Vdc, is available in either 20 or 30 A
models and is compatible with most
manufacturers switching converters
including all Vicor DC-DC converter
models.
The MicroRAM’s closed loop architecture
greatly improves load transient response and
with dual mode control, insures precise point
of load voltage regulation, The MicroRAM
supports redundant and parallel operation
with its integrated OR’ing diode function.
It is available in Vicor’s standard Micro
package (quarter brick) with a variety of
terminations for through hole, socket or
surface mount applications.
60 Hz to 1 MHz
N+1 redundancy
transient response
Set your site on VICOR at www.vicorpower.com
MicroRAM
*Pin styles S & N are compatible with the ModuMate interconnect system for socketing and surface mounting.
Parameter
+In to –In
Load current
Ripple Input (Vp-p)
Mounting torque
Pin soldering temperature
Parameter
Baseplate to sink
Baseplate to ambient
uRAM 2
Product
flat, greased surface
with thermal pad (P/N 20265)
free convection
1000 LFM
2 = 20 A
3 = 30 A
Type
MicroRAM Data Sheet
Grade Operating
C =
T =
H =
M =
Product Grade Temperatures (°C)
– 20 to +100
– 40 to +100
– 40 to +100
– 55 to +100
(0.45 – 0.68)
500 (260)
750 (390)
C
Rating
4 – 6
100
500
30
40
40
– 40 to +125
– 40 to +125
– 55 to +125
– 65 to +125
Storage
°F (°C)
°F (°C)
In. lbs
(Nm)
G = Long RoHS
N = Long ModuMate
Unit
S = Short ModuMate
F = Short RoHS
Vdc
Vdc
Adc
1 = Short Pin
2 = Long Pin
mV
mV
0.16
0.14
Typ
8.0
1.9
Pin Style*
57,9 x 36,8 x 12,7 mm
2
2.28 x 1.45 x 0.5 in
Rev. 1.4
Notes
Continuous
100ms
Continuous
60 Hzc 100 kHz
100 kHz – 2 MHz
6 each, 4-40 screw
<5 sec; wave solder
<7 sec; wave solder
Unit
°C/Watt
°C/Watt
°C/Watt
°C/Watt
Actual size:
1 = Slotted
2 = Threaded
3 = Thru-hole
Baseplate
Page 1 of 10
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URAM2T23 Summary of contents

Page 1

RoHS Compliant (with pin option) • > ripple attenuation from MHz • Integrated OR’ing diode supports N+1 redundancy • Significantly improves load transient response • Efficiency up to 98% • ...

Page 2

Electrical characteristics apply over the full operating range of input voltage, output power and baseplate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate. µRAM MODULE SPECIFICATIONS (-20°C to +100°C baseplate temperature) ...

Page 3

APPLICATION SCHEMATIC DRAWINGS USING VICOR CONVERTERS AND THE µRAM +IN PC DC-DC Converter PR –IN Figure 1 — Typical Configuration using Remote Sensing +IN DC-DC PC Converter PR –IN Figure 2 — Typical Configuration using SC Control (Oppional CHR 25µF ...

Page 4

The active loop senses the output current and reduces the headroom voltage in a linear fashion to approximate constant power dissipation of MicroRAM with increasing loads (see Figures 5, 6 & 6). The headroom setting can be reduced ...

Page 5

Ripple Attenuation @ 28 V (Room Temp.) 20.00 0.00 -20.00 -40.00 -60.00 -80.00 10 100 Figure 3a Ripple Attenuation @ 5 V (Room Temp.) 20.00 0.00 -20.00 -40.00 -60.00 -80.00 10 100 Figure 3a, 3b — Curves demonstrating the small ...

Page 6

Hz Figure 4a -0 -25 -50 - Figure 4a — 4b — Simulated graphs demonstrating the tradeoff of attenuation versus headroom setting at 20 Amps and an equivalent 100°C baseplate temperature at 3 ...

Page 7

OUT 400 mV 300 mV 200 load Figure 5 ...

Page 8

Figure 11 — V375B12C250B and µRAM; Input and output ripple@50% (10 A) load CH1=Vi; CH2= Vo; Vi-Vo = 305mV; R =80k (Configured as in Figs. 1 & Figure 13 — V300B12C250B and µRAM; Input and output dynamic response ...

Page 9

Pins No. Function Label 1 +In + 0.235±.015 5,97±0,38 2 Control SC (REF ext. CTRAN 4 –In – 5 –Out – 0.350±.015 8,89±0,38 6 Reference Vref (REF) 7 +Out + Slotted (Style 1) 0.21 5,2 or (REF) ...

Page 10

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 ...

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