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| 型號(hào)： | FM3020-7PD3AHFU |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE |
| 文件頁(yè)數(shù)： | 3/24頁(yè) |
| 文件大?。?/td> | 536K |
| 代理商： | FM3020-7PD3AHFU |
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M-Family
DC-DC Converters <100 W
Rugged Environment
7 - 12
Edition 2/96 - Melcher AG
MELCHER
The Power Partners.
7.1
Table 11a: Rext for Uo < Uo nom (conditions: Ui nom, Io nom, rounded up to resistor values E 96, Rext' = ∞)
Uo nom = 5.1 V
Uo nom = 12 V
Uo nom = 15 V
Uo nom = 24 V
Uo nom = 48 V
Uo [V]
Rext [k
]
Uo [V]
Rext [k
]
Uo [V]
Rext [k
]
Uo [V]
Rext [k
]
Uo [V]
Rext [k
]
0.5
0.432
2.0
0.806
2.0
0.619
4.0
0.806
8.0
0.806
1.0
0.976
3.0
1.33
4.0
1.47
6.0
1.33
12.0
1.33
1.5
1.65
4.0
2.0
6.0
2.67
8.0
2.0
16.0
2.0
2.61
5.0
2.87
8.0
4.53
10.0
2.87
20.0
2.87
2.5
3.83
6.0
4.02
9.0
6.04
12.0
4.02
24.0
4.02
3.0
5.76
7.0
5.62
10.0
8.06
14.0
5.62
28.0
5.62
3.5
8.66
8.0
8.06
11.0
16.0
8.06
32.0
8.06
4.0
14.7
9.0
12.1
12.0
16.2
18.0
12.1
36.0
12.1
4.5
30.1
10.0
20.0
13.0
26.1
20.0
40.0
20.0
5.0
200.0
11.0
44.2
14.0
56.2
22.0
44.2
44.0
44.2
Fig. 10
Output voltage control by means of the R input
Table 11b: R'ext for Uo > Uo nom (conditions: Ui nom, Io nom, rounded up to resistor values E 96, Rext = ∞)
Uo nom = 5.1 V
Uo nom = 12 V
Uo nom = 15 V
Uo nom = 24 V
Uo nom = 48 V
Uo [V]
R'ext [k]
Uo [V]
R'ext [k]
Uo [V]
R'ext [k]
Uo [V]
R'ext [k]
Uo [V]
R'ext [k]
5.15
464
12.1
1780
15.2
1470
24.25
3160
48.5
6810
5.20
215
12.2
909
15.4
750
24.50
1620
49.0
3480
5.25
147
12.3
619
15.6
511
24.75
1100
49.5
2370
5.30
110
12.4
464
15.8
383
25.00
825
50.0
1780
5.35
90.9
12.5
383
16.0
332
25.25
715
50.5
1470
5.40
78.7
12.6
316
16.2
274
25.50
590
51.0
1270
5.45
68.1
12.7
274
16.4
237
25.75
511
51.5
1100
5.50
61.9
12.8
249
16.5
226
26.00
453
52.0
953
13.0
200
26.25
402
52.5
845
13.2
169
26.40
383
52.8
806
Programmable Voltage (R Input)
As a standard feature single output modules offer an
adjustable output voltage identified by letter R in the type
designation. The control input R (pin 14) accepts either a
control voltage
Uext or a resistor Rext to adjust the desired
output voltage. When not connected, the control input auto-
matically sets the output voltage to
Uo nom. The control input
is protected against external overvoltage up to 8 V max.
a) Adjustment by means of an external control voltage
Uext
between pin 14 (R) and pin 17 (G):
The control voltage range is 0...2.75 V and allows an
adjustment in the range of approximately
Uo = 0...110% Uo nom.
Uo
Uext ≈ –––––– 2.5 V
Uo nom
b) Adjustment by means of an external resistor:
Depending upon the value of the required output volt-
age, the resistor shall be connected
either: Between pin 14 and pin 17 (
Uo < Uo nom) to
achieve an output voltage adjustment range of approx.
Uo = 0...100% Uo nom
U o
Rext ≈ 4 k –––––––––
Uo nom – Uo
or: Between pin 14 and pin 20 (
U
o > Uo nom) to achieve
an output voltage adjustment range of approximately
U
o = 100...110 % of Uo nom.
(
U o – 2.5 V)
R'ext ≈ 4 k ––––––––––––––––––
2.5 V (
U o/Uo nom – 1)
For output voltages
Uo > Uo nom, the minimum input voltage
according to "Electrical Input Data" increases proportionally
to
Uo/Uo nom.
Warning
20
32
23
29
R
Vo1+
Vo1–
G
+
U
ext
AM…LM 1000
C/D/LMZ 1000
20
14
32
23
R
Vo1+
Vo1–
G
R
ext
R'
ext
17
14
–
AM…LM 1000
C/D/LMZ 1000
4 k
2.5 V
29
control
circuit
4 k
2.5 V
control
circuit
Vi+
Vi–
Vi+
Vi–
The value of
R'ext should never be less than 47 k to avoid
damage to the unit! R inputs may be parallel connected, but
1/Rtot = 1/R1 + 1/R2 +.... should be considered.
Remark
The R-feature excludes option P (output voltage adjust-
ment by potentiometer).
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