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uRAM2C11 반도체 회로 부품 판매점

Output Ripple Attenuation Module



Vicor Corporation 로고
Vicor Corporation
uRAM2C11 데이터시트, 핀배열, 회로
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


uRAM2C11 데이터시트, 핀배열, 회로
Electrical Characteristics
PRELIMINARY
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)
Parameter
Operating current range
µRAM2xxx
µRAM3xxx
Min Typ Max
0.02 20
0.02 30
Unit
A
A
Operating input voltage
Transient output response
Load current step <1A/µsec
Transient output response
Load current step <1A/µsec
(CTRAN = 820µF)
VHR headroom voltage range(1)
@ 1A load
Output ripple
Input Vp-p = 100mV
3.0
325
30 Vdc
50 mVp-p
50 mVp-p
425 mV
10 mVp-p
5 mVrms
Output ripple
Input Vp-p = 500mV
SC output voltage(2)
OR’ing threshold
µRAM bias current
Power Dissipation
µRAM2xxx VHR = 380mV@1A
µRAM3xxx VHR = 380mV@1A
10 mVp-p
5 mVrms
1.23 Vdc
10 mV
60 mA
7.5 W
11.5 W
Notes
No internal current limiting. Converter input must be
properly fused such that the µRAM output current
does not exceed the maximum operating current
rating by more than 30% under a steady state condition.
Continuous
Step load change;
see Figures 9, 12, & 15, pp. 6-7
Optional capacitance CTRAN can be used
to increase transient current capability; See Figures
1 & 2 on p. 3 and Figures 10, 13, & 16 on pp. 6-7
See Figures 5, 6 & 7
See Table 1 for headroom setting resistor values
Ripple frequency 60Hz to 100kHz; optional capacitor
CHR = 100µF required to increase low frequency
attenuation as shown in Figures 3a and 3b
see Figures 8, 11, & 14, pp. 6-7
Ripple frequency 100kHz to 2MHz;
see Figures 8, 11, & 14, pp. 6-7
See Table 1 RSC value
Vin – Vout
Vin = 28V; Iout = 20A
Vin = 28V; Iout = 30A
(1) Headroom is the voltage difference between the +Input and +Output pins.
RHR = (µRAM +Out/VHR) x 2.3k (see Table 1 for example values)
(2) SC resistor is required to trim the converter output up to accommodate the headroom of the µRAM module when remote sense
is not used. This feature can only be used when the trim reference of the converter is in the 1.21 to 1.25 Volt range.
(see Table 1 with calculated RSC resistor values)
RSC = ((µRAM +Out)/1.23V x 1k) – 2k
µRAM Out
3.0V
5.0V
12.0V
15.0V
24.0V
28.0V
VHR @ 1A
375mV
375mV
375mV
375mV
375mV
375mV
RHR Value (ohms)
18.4k
30.6k
73.6k
92.0k
147.2k
171.7k
RSC Value (ohms)
0.439k
2.07k
7.76k
10.20k
17.50k
20.76k
Table 1—RHR and RSC are computed values for a 375mV case. To compute different headroom voltages, or for standard resistor
values and tolerances, use Notes 1 and 2.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
MicroRAM Data Sheet
Set your site on VICOR at www.vicorpower.com
Rev. 1.1
Page 2 of 8




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