|
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
|
|
| Quantity |
Price |
| 1-49 |
$47.60 |
| 50-99 |
$39.70 |
| 100-199 |
$35.08 |
| 200+ |
$33.00 |
PST-DCZ0303-W
water resistant 3V 3A
|
|
| 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-DCZ0305
3V 5A
|
|
| Quantity |
Price |
| 1-49 |
$57.60
|
| 50-99 |
$47.00 |
| 100-199 |
$40.00 |
| 200+ |
$38.20 |
PST-DCZ0305-W
water resistant 3V 5A
|
|
| 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 |
| |
3
Amp version |
5
Amp Version |
|
Output Voltage |
3.0 VDC ± 0.1 VDC
|
3.0 VDC ± 0.1
VDC |
|
Readily Available Custom
Output Voltages |
3VDC
to
9VDC
|
3VDC
to
9VDC
|
|
Maximum steady state input
voltage range |
8
VDC to 36 VDC ** |
8
VDC to 36VDC ** |
|
Nominal continuous output
current when input voltage is between
8VDC and 20VDC |
3.0A |
5.0A |
|
Line regulation |
± 0.5% |
± 0.5% |
|
Load regulation |
± 1.0% |
± 1.0% |
|
Minimum input voltage for
load regulation of 10 %, see Note 1
|
7
VDC (1 minute duration) |
7
VDC (20% sag) (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. |
**Note: the efficiency
drops when the input voltage is above
28 volts, derating either the maximum
abmient temperature or output current
is appropriate when operating at the
higher voltages
|
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
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. |
|
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
|
|
|
|
|
|
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 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. |
