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Robust 12VDC
and 24VDC (8VDC to 28VDC) to 5V DC/DC converter |
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5 volt DC/DC
converters with 8 to 28 VDC input |
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These are regulated
switching power converters (switchmode), designed to allow the use of 5 volt
equipment in 12V or 24V vehicles. These 5V output converters have been designed
to be very rugged electrically and can be operated continuously at 75°C
(65°C for the 5A version).
These are also known as 5 volt voltage
reducers, and voltage regulators.
Custom output voltages are available from
3.3VDC to the input voltage minus 1.5 volts (10.5VDC for a 12 volt input, 22.5
for a 24 volt input)
Prices:
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Electrical
Specifications |
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3 Amp version |
5 Amp Version |
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Output Voltage |
5.0 VDC ± 0.1 VDC |
5.0 VDC ± 0.1 VDC |
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Readily Available Custom
Output Voltages |
3VDC to 9VDC |
3VDC to 9VDC |
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Maximum steady state input
voltage range |
8 VDC to 28 VDC |
8 VDC to 28 VDC |
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Nominal continuous output
current when input voltage is between 8VDC and 20VDC |
3.0A |
5.0A |
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Line regulation |
± 0.5% |
± 0.5% |
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Load regulation |
± 1.0% |
± 1.0% |
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Minimum input voltage for
load regulation of 10 %, see Note 1 |
7 VDC (1 minute
duration) |
7 VDC (20% sag) (1 minute
duration) |
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Maximum output ripple
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10mV p-p |
25mV p-p |
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Maximum switching noise
level |
90mV p-p |
90mV p-p |
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Maximum operating
temperature range |
-40°C to 75°C
(-40°F to 167°F) |
-40°C to 65°C
(-40°F to 149°F) |
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Maximum storage temperature
range |
-40°C to 90°C (-
40°F to 194°F) |
-40°C to 90°C (-
40°F to 194°F) |
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Minimum efficiency, see
Figure 1 |
78% 24 VDC input, 0.15A
load |
77% 24 VDC input, 1A
load |
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Maximum efficiency,
see Figure 1 |
89% 12 VDC input, 1.0A
load |
88% 12 VDC input, 1.0A
load |
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Isolation |
Common ground, the negative
input is tied to the negative output. The frame is isolated. |
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Protection
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Overload
protection |
If there is a short
circuit connection or other overload connection is sensed, the unit will
automatically limit the output current and, depending on severity, will go into
a hiccup mode. See Note 2. |
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Over temperature
protection |
If an extreme over
temperature condition occurs the unit will shut down until the temperature is
reduced. See Note 3. |
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Reverse polarity
protection |
If an
in-line 4A fast acting fuse (5A for the 5A model) is connected as shown in
Figure 2, then the unit will be protected from reverse polarity connection.
If the fuse is used and there is a reverse polarity connection, the fuse
will blow and protect the unit from damage. See Note 4. |
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Physical Specifications
for both models |
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Weight |
108 grams
or about 3.8 ounces |
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Dimensions |
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120mm (4.73
inches) |
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55mm (2.17
inches) |
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33mm (1.30
inches) |
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Connections
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Input
connector |
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Output
connector |
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2 position screw
terminal block |
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2 position screw
terminal block |
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Note 1: Extended operation at voltages
less than 8.0 VDC is not recommended although the unit will work at voltages
lower than this with reduced load regulation. With voltages lower than 7.0 VDC,
output voltage will drop out until the voltage is increased.
Note 2: If
an overload is sensed, the unit will automatically limit the output current and
reduce the output voltage. If the output voltage is excessively reduced to
limit current, the unit will go into a hiccup mode and wait until the overload
is removed to restore power. This dual-mode overload protection system allows
the unit to be protected from continuous short circuit connection and other
overload conditions.
Note 3: Extended operation at temperatures above
75C can damage the unit and will void the warranty.
Note 4: If the
in-line 4A fast-acting fuse is not connected as shown in Figure 2, a reverse
polarity connection can damage the unit and will void the
warranty.
Typical efficiency curve for the 5VDC 3Amp model
Efficiency curves for the 5VDC 5Amp
DC-DC converter
 
Advantages:
 Inexpensive Switchmode DC/DC
Converter.
High efficiency.
Excellent line and load
regulation.
Wide input voltage range. |
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PowerStream
Technologies: 1163 S. 1680 West. Orem Utah
84058
Phone: 801-764-9060
Fax: 801-764-9061 |
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© Copyright
2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Lund Instrument
Engineering, Inc. All rights reserved |
12 to 5 volt DC/DC converter
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OUT OF STOCK UNTIL FIRST OF
MAR
