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uRAM2H22 Schematic ( PDF Datasheet ) - Vicor Corporation

Teilenummer uRAM2H22
Beschreibung Output Ripple Attenuation Module
Hersteller Vicor Corporation
Logo Vicor Corporation Logo 




Gesamt 8 Seiten
uRAM2H22 Datasheet, Funktion
45
Features
>40dB ripple attenuation from
60Hz to 1MHz
Integrated OR’ing diode supports
N+1 redundancy
Significantly improves load
transient response
Efficiency up to 98%
User selectable performance optimization
Combined active and passive filtering
3-30Vdc input range
20 and 30 Ampere ratings
PRELIMINARY
Data Sheet
MicroRAMTM
Output Ripple Attenuation Module
Patents Pending
Shown actual size:
2.28 x 1.45 x 0.5 in
57,9 x 36,8 x 12,7 mm
Product Highlights
Vicor’s MicroRAM output ripple attenuation
module combines both active and passive
filtering to achieve greater than 40dB of
noise attenuation from 60Hz to 1Mhz. The
MicroRAM operates over a range of 3 to
30Vdc, is available in either 20 or 30A
models and is compatible with most
manufacturers switching converters
including Vicor’s 1st and 2nd Generation
DC-DC converters.
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.
Absolute Maximum Ratings
Parameter
+In to –In
+In to –In
Load current
Ripple Input (Vp-p)
Ripple Input (Vp-p)
Mounting torque
Pin soldering temperature
Pin soldering temperature
Storage temperature (C, T-Grade)
Storage temperature (H-Grade)
Storage temperature (M-Grade)
Operating temperature (C-Grade)
Operating temperature (T, H-Grade)
Operating temperature (M-Grade)
Thermal Resistance
Rating
30
40
40
100
500
4-6 (0.45-0.68)
500 (260)
750 (390)
-40 to +125
-55 to +125
-65 to +125
-20 to +100
-40 to +100
-55 to +100
Unit
Vdc
Vdc
Adc
mV
mV
In. lbs (Nm)
°F (°C)
°F (°C)
°C
°C
°C
°C
°C
°C
It is available in Vicor’s standard micro
package (quarter brick) with a variety of
terminations for through hole, socket or
surface mount applications.
Parameter
Baseplate to sink; flat, greased surface
Baseplate to sink; with thermal pad (P/N 20264)
Baseplate to ambient
Baseplate to ambient; 1000 LFM
Typ
0.16
0.14
8.0
1.9
Notes
Continuous
100ms
Continuous
60Hzc100 kHz
100kHz –2MHz
6 each, 4-40 screw
5 sec; wave solder
7 sec; wave solder
Baseplate
Baseplate
Baseplate
Unit
°C/Watt
°C/Watt
°C/Watt
°C/Watt
Part Numbering
uRAM 2
C
21
Product
Type
2 = 20A
3 = 30A
Product Grade
C = –20°C to +100°C
T = –40°C to +100°C
H = –40°C to +100°C
M = –55°C to +100°C
Pin Style*
1 = Short Pin
2 = Long Pin
S = Short ModuMate
N = Long ModuMate
Baseplate
1 = Slotted
2 = Threaded
3 = Thru-hole
*Pin styles S & N are compatible with the ModuMate interconnect system for socketing and surface mounting.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
MicroRAM
Set your site on VICOR at www.vicorpower.com
Rev. 1.1
Page 1 of 8






uRAM2H22 Datasheet, Funktion
PRELIMINARY
µRAM2xxx (µRAM3xxx data not included in this rev.)
450mV
400mV
VOUT=3V
450mV
400mV
VOUT=15V
300mV
200mV
1A 2A 4A 6A
V(VSOURCE) –V(VOut)
8A
Rhr=16k
17k
18k
19k
20k
21k
10A
12A
14A
16A
18A
20A
I_Iload
Figure 5—Headroom vs. load current at 3V output.
300mV
200mV
1A 2A 4A 6A
V(VSOURCE) –V(VOut)
8A
Rhr=80k
85k
90k
95k
100k
105k
10A
I_Iload
12A
14A
16A
18A 20A
Figure 6—Headroom vs. load current at 15V output.
450mV
400mV
VOUT=28V
300mV
200mV
1A 2A 4A 6A
V(VSOURCE) –V(VOut)
8A
Rhr=150k
160k
170k
180k
190k
200k
10A
12A
14A
16A
18A
20A
I_Iload
Figure 7—Headroom vs. load current at 28V output.
Figure 8—V375A28C600A and µRAM; Input and output ripple
@50% (10A) load CH1=Vi; CH2=Vo; Vi-Vo=332mV; RHR=178k
Figure 9—V375A28C600A and µRAM; Input and output
dynamic response no added CTRAN; 20% of 20A rating load
step of 4A (10A14A);RHR=178k (Configured as in Figs. 1 & 2)
Figure 10—V375A28C600A and µRAM; Input and output
dynamic response CTRAN=820µF Electrolytic; 32.5% of load step
of 6.5A (10A16.5A);RHR=178k (Configured as in Figs. 1 & 2)
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
MicroRAM Data Sheet
Rev. 1.1
Page 6 of 8
Set your site on VICOR at www.vicorpower.com

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