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| 型號： | 110H1901-2RD4 |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT AC-DC REG PWR SUPPLY MODULE |
| 封裝： | 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE H02, MODULE |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 358K |
| 代理商： | 110H1901-2RD4 |
Benign Environment
AC-DC Converters <100 W
H-Family
Edition 2/96 - Melcher AG
10 - 67
MELCHER
The Power Partners.
10.3
Output Protection
Each output is protected against overvoltages which could
occur due to a failure of the internal control circuit. Voltage
suppressor diodes (which under worst case condition may
become a short circuit) provide the required protection. The
suppressor diodes are not designed to withstand externally
applied overvoltages. Overload at any of the outputs will
cause a shut-down of all outputs.
Fig. 2
Typical output voltage Uo versus output currents Io
Inhibit (i Input)
The outputs of the module may be enabled or disabled by
means of a logic signal (TTL, CMOS, etc.) applied to the
inhibit input. If the inhibit function is not required, connect
the inhibit pin 2 to pin 23 to enable the outputs (active low
logic, fail safe).
The reference for the inhibit signal is the negative pin of out-
put 1.
Fig. 5
Definition of inhibit voltage and current
Vo–
i
Vo+
I
inh
U
inh
N
P
Uo2/3 [V]
13
12
11
0
0.25
0.5
0.75
1.0
Uo2/3 0
Io2/3
Io2/3 nom
Io1 nom
0.5
Io1 nom
Io1 = 0 A
Uo2/3 [V]
16
15
14
0
0.25
0.5
0.75
1.0
Uo2/3 0
Io2/3
Io2/3 nom
Io1 nom
0.5
Io1 nom
Io1 = 0 A
Fig. 3
H2320/3020:
Uo2/3 (typ.) versus Io2/3 with different Io1
Fig. 4
H2540/3040:
U
o2/3 (typ.) versus Io2/3 with different Io1
Parallel and Series Connection
Main outputs of equal nominal voltage can be connected in
parallel. It is important to assure that the main output of a
multiple output module is forced to supply a minimum cur-
rent of 0.1 A to enable correct operation of its own auxiliary
outputs. Outputs one and two of a dual output unit may be
connected parallel without a minimum current requirement
at the main output. Outputs two and three of a triple output
unit can be connected in parallel.
In parallel operation, one or more of the outputs may oper-
ate continuously in current limit which will cause an in-
crease in case temperature. Consequently, a reduction of
the max. ambient temperature by 10 K is recommended.
Main or auxiliary outputs can be connected in series with
any other output of the same or another module. In series
connection, the maximum output current is limited by the
lowest current limit. Output ripple and regulation values are
added. Connection wiring should be kept as short as possi-
ble.
If output terminals are connected together in order to estab-
lish multi-voltage configurations, e.g. +5.1 V,
±12 V etc. the
common ground connecting point should be as close as
possible to the connector of the converter to avoid exces-
sive output ripple voltages.
Fig. 6
Typical inhibit current Iinh versus inhibit voltage Uinh
1.6
0.8
0
-0.8
-50
-40
20
40
U
inh [V]
I
inh [mA]
-30
0
-20
-10
10
30
50
2.0
1.2
0.4
-0.4
U
inh= 0.8 V
U
o = on
U
o = off
U
inh= 2.4 V
1.0
0
0.5
U
o
0.5
U
o nom
I
o
I
o nom
1.0
1.2
I
o nom
I
o1
I
o2,Io3
I
oL1
I
oL2,IoL3
0.95
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