| |
|
|
|
|
|
75 Watt 5V 15A Output Fully
Isolated DC/DC Converter with 24VAC (13VAC-53VAC) input
|
|
Run 5 volt equipment in 24VAC environments up
to 15Amps |
|
|
|
| Quantity |
1-50 |
50-99 |
100-499 |
500-999 |
1000+ |
| Price
PST-ACDC2405-15 |
$49.00
|
$43.25 |
$41.00 |
$38.50 |
$37.75 |
Isolated low voltage AC/DC
converter board for security systems.
| PST-DC2405-10 |
24 VAC to 5V, 75W AC-DC converter |
| Nominal Input Voltages |
24VAC, 36VAC, 48VAC |
| Input Range |
13VAC to 53VAC
Note: some components
have to be changed by us if you intend to run above 35VAC input |
| Output Voltage |
5VDC (trimable from 3.9 to 5.5 VDC by
adding two resistors) |
| Output Current |
0 to 15 Amps |
| Output Power |
zero to 75 Watts |
| Voltage set point accuracy |
±1% |
| Line Regulation |
±1% |
| Load Regulation |
±1% |
| Ripple and noise |
75mVp-p |
| Efficiency |
84% at 9-10 amps output |
| Dynamic Regulation 50% load step |
4% |
| |
Settling time 100 µSec |
| Remote turn-on |
When the two input terminals on J3 are
shorted together the unit turns OFF. |
| Output voltage trim range |
±10% |
| Short circuit protection |
Continuous |
| Over current protection |
Continuous, 110-150% threshold |
| Over voltage protection |
Continuous, 110-140% trip range |
| Turn-on time |
< 10 mS |
| Switching Frequency |
400 kHz |
| Temperature Coefficient |
±0.02% /°C |
| Temperature range |
-40°C to 100°C operating
(baseplate) |
| |
-55°C to +125°C storage |
| Size |
78mm x 170 mm (3 x 6.7 inches) |
| Weight |
4 oz, 113 grams |
| Humidity |
<95%, non condensing |
| Vibration |
5G, 3 axis, 5 minutes each |
Application
Notes:
Remote sense and trim functions
To use the remote sense,
connect the "Sense +" and "Sense -" terminals to wires that go to the load and don't carry any
current. This lets the DC converter stabilize the voltage at the load, compensating for voltage
loss in the wires that carry current.
In other words, without using the "Sense" terminals
the voltage will be stabilize at the converter output terminals. As the current flows through
wires, connectors, and contacts then resistance of these elements will cause a voltage drop due
to Ohm's law. If you run an extra set of wires from the sense terminals to the load that don't
carry current, then these can be used to sense the actual voltage at the load and the converter
will boost its voltage to compensate for this voltage drop (over a limited range, ±0.5
Volts.)
The sense terminals can also be used to trim the voltage with fixed resistors
or a pot as follows:
Schematic of how to trim the output voltage. Fixed
resistors would also work, they should add to about 10k Ohms.
Cooling
No
heat sink is necessary at ambient temperatures below 30°C. At higher ambient temperatures
derate the current or supply a flow of up to 200LFM (linear feet per minute) cooling air is
provided (at 100°C ambient). This can be supplied by a 10 cubic feet per minute fan that is
about 2.5 inches square. Pentium cooling heat-sink-fans will also do this.
Standard
heatsinks are available for half-brick modules such as Wakefield 517-95AB, 527-45AB, 527-24AB,
518-95AB, 528-45AB, 528-24AB, or the less expensive CUI VHS-45 or VHS-95.
Please
read this application note:
This DC converter cannot manufacture power, so make sure you
have enough 24VAC power to supply the load. The power output is limited to the power that is
input to it times the efficiency of 84%. So if you have a supply of 24VAC and 2.5 amps your
power is 60 watts (24V*2.5A=60W) So the most we can deliver is 60W/5V * 0.84 efficiency = 10
Amps. Of course you can draw less than 10 Amps, this is the maximum.
If you only have
24VAC*.41A = 10 watts available, you can still use this unit, just don't take more than 10/5 *
0.84 = 1.68 amps out.
Printed circuit board dimensions are 3 x 6.7
inches
NOTE! At maximum power the faceplate temperatures are definitely in the "burn your
fingers" category and care should be taken to prevent human contact.
|
|
|
|
|
|
PowerStream Technologies: 1163 S. 1680 West. Orem Utah 84058
Phone: 801-764-9060
Fax: 801-764-9061
|
| |
|
© Copyright 2000, 2002, 2003, 2004, 2008,
2009, 2010, 2012 Lund Instrument Engineering, Inc. All rights reserved |
Low voltage AC to DC converter, 24VAC, 36VAC, 48VAC to 5VDC |
| |
|
|
|