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These are regulated switching power
converters (switchmode), designed to allow the use of 12 volt equipment 24V vehicles. These 12V
output converters have been designed to be very rugged electrically and can be operated
continuously at 75°C (65°C for the 2A version).
These are also known as 12 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-DCZ1203 12V 1.25A
|
|
| Quantity |
Price |
| 1-49 |
$47.60 |
| 50-99 |
$39.70 |
| 100-199 |
$35.08 |
| 200+ |
$33.00 |
PST-DCZ1203-W weather resistant 12V 1.25A
|
|
| Quantity |
Price |
| 1-49 |
$61.00 |
| 50-99 |
$50.80 |
| 100-199 |
$44.95 |
| 200+ |
$42.25 |
| Note: weather resistant versions have wire leads
instead of screw terminals |
|
|
PST-DCZ1205 12V 2A
|
|
| Quantity |
Price |
| 1-49 |
$57.60 |
| 50-99 |
$47.00 |
| 100-199 |
$40.00 |
| 200+ |
$38.20 |
PST-DCZ1205-W weather resistant 12V 2A
|
|
| Quantity |
Price |
| 1-49 |
$73.80 |
| 50-99 |
$61.50 |
| 100-199 |
$54.40 |
| 200+ |
$51.10 |
| Note: weather resistant versions have wire leads instead of
screw terminals |
|
|
|
Electrical Specifications |
| |
1.25 Amp version |
2
Amp Version |
|
Output Voltage |
12.0 VDC ± 0.1
VDC |
12.0 VDC ± 0.1
VDC |
|
Readily Available Custom Output Voltages |
3VDC to 13VDC |
3VDC to 13VDC |
|
Maximum steady state input voltage range
|
13.5 VDC to 41 VDC ** |
13.5 VDC to 41 VDC ** |
|
Nominal continuous output current when input
voltage is between 8VDC and 20VDC |
1.25A |
2.0A |
|
Line regulation |
± 0.5% |
± 0.5% |
|
Load regulation |
± 1.0% |
± 1.0% |
|
Minimum input voltage for load regulation of 10
%, see Note 1 |
13.5 VDC (1 minute duration) |
13.5 VDC (1 minute duration) |
|
Maximum output ripple |
10mV p-p |
25mV p-p |
|
Maximum switching noise level |
90mV p-p |
90mV p-p |
|
Maximum operating temperature range
|
-40°C to 75°C (-40°F to
167°F) |
-40°C to 65°C (-40°F to
149°F) |
|
Maximum storage temperature range |
-40°C to 90°C (- 40°F to
194°F) |
-40°C to 90°C (- 40°F to
194°F) |
|
Minimum efficiency, see Figure 1 |
78% 24 VDC input, 0.15A load |
77% 24 VDC input, 1A load |
|
Maximum efficiency, see Figure
1 |
89% 12 VDC input, 1.0A load |
88% 12 VDC input, 1.0A load |
|
Isolation |
Common ground, the negative input is tied to the
negative output. The frame is isolated. |
|
Protection |
|
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. |
|
Over temperature protection |
If an extreme over temperature condition occurs
the unit will shut down until the temperature is reduced. See Note 3. |
|
Reverse polarity protection |
If an in-line 4A fast acting
fuse (5A for the 1205 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. |
|
Physical Specifications for both
models |
|
Weight |
108 grams or about 3.8
ounces |
|
Dimensions |
|
|
120mm (4.73 inches) |
|
55mm (2.17 inches) |
|
33mm (1.30 inches) |
|
|
Connections |
|
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|
|
|
Input connector |
2 position screw terminal block will accept 14awg
to 24 awg wire |
|
|
Output connector |
2 position screw terminal block will accept 14awg
to 24 awg wire |
|
| Input and output connectors for weather resistant
versions |
18AWG Red and Black wires, 6 inches
(15 cm) long |
|
| |
|
|
Note 1: Extended operation at voltages less than 13.5 VDC is not recommended
although the unit will work at voltages lower than this with reduced load
regulation.
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 version
Efficiency curves for the 5VDC 5Amp DC-DC converter
 
Advantages:
 30V to 12V Inexpensive
Switchmode DC/DC Converter.
High
efficiency.
Excellent line and
load regulation 30v to 12v converter.
Wide input
voltage range 12v 30v dc converter. |
