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uRAM2C21 の電気的特性と機能

uRAM2C21のメーカーはVicor Corporationです、この部品の機能は「Output Ripple Attenuation Module」です。


製品の詳細 ( Datasheet PDF )

部品番号 uRAM2C21
部品説明 Output Ripple Attenuation Module
メーカ Vicor Corporation
ロゴ Vicor Corporation ロゴ 




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uRAM2C21 Datasheet, uRAM2C21 PDF,ピン配置, 機能
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

1 Page





uRAM2C21 pdf, ピン配列
Electrical Characteristics (continued)
PRELIMINARY
APPLICATION SCHEMATIC DRAWINGS USING VICOR CONVERTERS AND THE µRAM
RSENSE
(2)
+In
+Out
5.1
PC +S
DC-DC
SC
Converter
PR –S
22µF
CTRAN*
+In
SC
CTRAN
–In
µRAM
+Out
VREF
–Out
CHR*
RHR
–In –Out
*Optional Component
Figure 1—Typical Configuration using Remote Sensing
+In +Out
PC DC-DC
PR Converter SC
–In –Out
RSC
CTRAN*
*Optional Component
+In
SC
CTRAN
–In
µRAM
+Out
VREF
–Out
CHR*
RHR
Figure 2—Typical Configuration using SC Control (Oppional CHR 25µF maximum in SC configuration.)
Functional Description
The MicroRAM has an internal passive filter that
effectively attenuates ripple in the 50kHz to 1MHz range.
An active filter provides attenuation from low frequency
up to the 1MHz range. The user must set the headroom
voltage of the active block with the external RHR resistor
to optimize performance. The MicroRAM must be connected
as shown in Figures 1 or 2 depending on the load sensing
method. The transient load current performance can be
increased by the addition of optional CTRAN capacitance
to the CTRAN pin. The low frequency ripple attenuation
can be increased by addition of optional CHR capacitance
to the VREF pin as shown in Figures 3a and 3b, on p. 5.
Transient load current is supplied by the internal CTRAN
capacitance, plus optional external capacitance, during the
time it takes the converter loop to respond to the increase
in load. The MicroRAM’s active loop responds in roughly
one microsecond to output voltage perturbations. There
are limitations to the magnitude and the rate of change of
the transient current that the MicroRAM can sustain while
the converter responds. See Figures 8-16, on pp. 6 and 7,
for examples of dynamic performance. A larger headroom
voltage setting will provide increased transient performance,
ripple attenuation and power dissipation while reducing
overall efficiency (see Figures 4a, 4b, 4c and 4d on p. 5).
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 3 of 8


3Pages


uRAM2C21 電子部品, 半導体
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

6 Page



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共有リンク

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uRAM2C21

Output Ripple Attenuation Module

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