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Robust 3VDC DC/DC Converter, input range 8VDC to 28VDC (12VDC and 24VDC) |
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3 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 3 volt equipment in 12V or 24V vehicles. These 3V 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 3 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:
PST-DCZ0303 3V 3A
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| Quantity |
Price |
| 1-49 |
$47.60 |
| 50-99 |
$39.70 |
| 100-199 |
$35.08 |
| 200+ |
$33.00 |
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PST-DCZ0305 3V 5A
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| Quantity |
Price |
| 1-49 |
$57.60 |
| 50-99 |
$47.00 |
| 100-199 |
$40.00 |
| 200+ |
$38.20 |
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Electrical Specifications |
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3 Amp version |
5 Amp Version |
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Output Voltage |
3.0 VDC ± 0.1 VDC |
3.0 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 |
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 3 volt DC/DC converter
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