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| 型號： | LMZ1601-7R |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 25/26頁 |
| 文件大小： | 771K |
| 代理商： | LMZ1601-7R |
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M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
BCD20018 Rev AB
Page 8 of 26
www.power-one.com
Fig. 6
Output current derating versus temperature
Fig. 4
Typical voltage Vo versus output currents Io.
Fig. 5
Dynamic load regulation Vo d versus load change.
1.0
0
0.5
V
o
0.5
V
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
05022a
Io/Io nom
1
Vod
td
V
o I
V
o I
t
Vo
0
t
≥10 s
05010a
0.3
Output Characteristic and Protection
Each output is protected by a suppressor diode, which under
worst case conditions may become a short circuit. The
suppressor diodes are not designed to withstand externally
applied overvoltages. Overload at any of the outputs will cause
a shutdown of all outputs. A red LED indicates the overload
condition of the respective output.
Thermal Considerations and Protection
If a converter is located in free, quasi-stationary air (convection
cooling) at the indicated maximum ambient temperature TA max
(see table Temperature specifications) and is operated at its
nominal input voltage and output power, the temperature
measured at the measuring point of case temperature TC (see
Mechanical Data) will approach the indicated value TC max after
the warm-up phase. However, the relationship between TA and
TC depends heavily on the conditions of operation and
integration into a system. The thermal conditions are
influenced by input voltage, output current, airflow, and
temperature of surrounding components and surfaces. TA max
is therefore, contrary to TC max, an indicative value only.
Caution: The installer must ensure that under all operating
conditions TC remains within the limits stated in the table
Temperature specifications.
Notes: Sufficient forced cooling or an additional heat sink allow TA
to pass over 71 °C, if TC max is not exceeded.
For -7 or -9 models at an ambient temperature TA of 85 °C with
only convection cooling, the maximum permissible current for
each output is approx. 50% of its nominal value; see figure 6.
A temperature sensor generates an internal inhibit signal
disabling the outputs, when the case temperature exceeds
TC max.
The
outputs
automatically
recover,
when
the
temperature drops below this limit.
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 converter is forced to supply a minimum
current of 0.1 A to enable correct operation of its own auxiliary
outputs.
In parallel operation, one or more of the main outputs may
operate continuously in current limitation, causing an increase
of the case temperature TC. 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 converter. 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 possible.
If output terminals are connected together in order to establish
multi-voltage configurations, e.g., +5.1 V, ±12 V etc., the
common-ground connecting point should be as close as
possible to the connectors of the converter in order to avoid
excessive output ripple voltages.
Note: Auxiliary outputs should never be connected in parallel!
0
0.2
0.4
0.6
0.8
50
60
70
80
90
100
I
o /Io nom
T
A [°C]
1.0
Forced cooling
05031a
T
C max
Convection cooling
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