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參數(shù)資料
| 型號： | FARM1EN1 |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 500 W AC-DC UNREG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 633K |
| 代理商： | FARM1EN1 |
Set your site on VICOR at vicorpower.com
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 6.0
Page 7 of 11
+IN
PC (GATE IN)
PR
–IN
N
EMI GND
N/C
L
+
EN
–
150 k
15 Vdc
Micro-
controller
Vicor DC-DC
Converter
FARM
BOK
ST
Not used with VI-260/VI-J60
Figure 10 — Enable (EN) function
Bus-OK (BOK) Pin. (see Fig. 11)
The Bus-OK pin is
intended to provide early-warning power fail information and
is also referenced to the negative output pin.
CAUTION: There is no input-to-output isolation in
the FARM. It is necessary to monitor Bus OK via an
optoisolator if it is to be used on the secondary
(output) side of the converters. A line-isolation
transformer should be used when performing
scope measurements. Scope probes should never
be applied simultaneously to the input and output
as this will damage the module.
Filter. (see Fig. 12)
An integral input filter consists of a
common mode choke and Y rated capacitors (line-ground)
plus two X rated capacitors (line-line). This filter
configuration provides common mode and differential mode
insertion loss in the frequency range between 100 kHz and
30 MHz as illustrated in Figure 6.
Hold-up Capacitors.
Hold-up capacitor values should be
determined according to output bus voltage ripple, power fail
hold-up time, and ride-through time (see Fig. 13).
Many applications require the power supply to maintain
output regulation during a momentary power failure of
specified duration, i.e., the converters must hold-up or ride-
through such an event while maintaining undisturbed output
voltage regulation. Similarly, many of these same systems
require notification of an impending power failure in order to
allow time to perform an orderly shut down.
The energy stored on a capacitor which has been charged to
voltage V is:
ε = 1/2(CV2)(1)
Where:
ε = stored energy
C = capacitance
V = voltage across the capacitor
Energy is given up by the capacitors as they are discharged by
the converters. The energy expended
(the power-time product) is:
ε = PΔt = C(V
1
2–V
2
2) / 2
(2)
Where:
P = operating power
Δt = discharge interval
V1 = capacitor voltage at the beginning
of
Δt
V2 = capacitor voltage at the end of Δt
Rearranging Equation 2 to solve for the required capacitance:
C = 2P
Δt / (V
1
2–V
2
2)(3)
APPLICATION NOTE (CONT.)
+IN
PC
PR
–IN
N
EMI GND
N/C
L
+
BOK
ST
EN
–
Vicor DC-DC
Converter
Micro-
controller
15 Vdc
+5 Vdc
Secondary
referenced
Figure 11 — Bus OK (BOK) isolated power status indicator
4.7 nF
L1
4.7 nF
N
EMI GND
N/C
L
0.47
μF
0.099
μF
330
μH
+
BOK
ST
EN
–
Figure 12 — Internal filter
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| FARM1EN2 | 制造商:POWERBOX 制造商全稱:Powerbox 功能描述:AUTORANGING AC INPUT WITH FILTER |
| FARM1EN3 | 制造商:POWERBOX 制造商全稱:Powerbox 功能描述:AUTORANGING AC INPUT WITH FILTER |
| FARM1ES1 | 制造商:POWERBOX 制造商全稱:Powerbox 功能描述:AUTORANGING AC INPUT WITH FILTER |
| FARM1ES2 | 制造商:POWERBOX 制造商全稱:Powerbox 功能描述:AUTORANGING AC INPUT WITH FILTER |
| FARM1ES3 | 制造商:POWERBOX 制造商全稱:Powerbox 功能描述:AUTORANGING AC INPUT WITH FILTER |
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