KEPCO RCW 1500W Series - Manual (Page 3)

RCW 1500W 120607
1
1.0 INTRODUCTION
1.1 SCOPE OF MANUAL
This Operator's Manual covers the installation and operation of the Kepco RCW 1500W Series of
Switching Power Supplies. For service information, write directly to: Kepco Inc., 131-38 Sanford
Avenue, Flushing, New York, 11355, U.S.A. Please state Model Designation and Serial Number of
your RCW Power Supply. This information can be found on the nameplate of the unit.
1.2 DESCRIPTION
The Kepco RCW 1500W Series consists of seven models of Switching Power Supplies, with a sin-
gle output as shown in Table 1. RCW power supplies are compliant with the Low Voltage Directive
(LVD) and carry the CE Mark. Units are designed to operate with a universal input voltage within the
range of 85 to 264V AC and may be operated with either 100-120V AC, or 200-240V AC, 50-60 Hz
(47-66 Hz) input. They will also operate on 125V to 370V dc input. The RCW 1500W Series
employs a light weight ferrite core transformer with 150 KHz typical switching frequency. The
Power Factor Correction Circuit has a typical switching of 80 KHz. Regulation is provided by pulse
width modulation. A FET power stage, operating in the forward conversion mode provides a
smooth isolated dc output. A resistor and thyristor "soft-start" circuit prevents excessive turn-on
current surge. Overvoltage protection and optically isolated remote TTL ON-OFF control are pro-
vided. Current limiting with automatic recovery from short circuit is featured. Units are enclosed in a
wrap-around aluminum case with a green LED "output present" light visible on the terminal side of
the case.
2.0 SPECIFICATIONS
Table 1 contains specifications and operating limits of individual RCW 1500W Series models. Table
2 contains specifications and operating limits common to all RCW 1500W Series Models. These
specifications are at nominal input voltages at 25°C unless otherwise specified.
TABLE 1. POWER SUPPLY RATINGS AND SPECIFICATIONS
MODEL RCW 1500W 3.3-300K 5-300K 12-125K 15-100K 24-65K 28-55K 48-32K
Output Volts d-c (5) 3.3V 5V 12V 15V 24V 28V 48V
Adjustment Range (7) 1.8-3.5 3.5~5.5 8.4~13.2 12.0~16.5 16.5~26.4 25.2~30.8 30.8~52.8
Maximum
Output
Ratings
(Amps/
Watts
50°C, amb A 300 300 125 100 65 55 32
50°C, amb W 1050 1500 1500 1500 1560 1540 1536
60°C, amb A 210 210 87.5 70A 45.5 38.5 22.4
60°C, amb W 735 1050 1050 1050 1092 1078 1075.2
70°C, amb A 120 120 50 40 26 22 12.8
70°C, amb W 420 600 600 600 624 616 614.4
Current Limit (Amps) (1) 315-350 315-350 130-140 105-115 68-72 57.7-63.2 33.6-36.8
OVP Settings (Volts) (2) 3.96-4.62 6.0-7.0 13.2-15.6 16.5-19.5 26.4-31.2 30.8-36.4 49.44-59.04
Efficiency %
typical
AC Input 120V 70 75 76 76 78 79 80
AC Input 240V 73 80 81 81 82 83 84
Ripple &
Noise (3)
(mV, p-p)
output ripple (max) 100 100 100 100 100 100 100
spike noise (max) (4) 200 200 200 200 200 200 300
Transient
Recovery
(6)
Recovery to
1%(<ms)
1 1 1 1 1 1 1
Excursion ±V max 1.0 1.0 1.0 1.0 1.0 1.0 1.0
1) The Power Supply has a square type overcurrent characteristic, shutdown by undervoltage detection
2) The Power Supply has a shut-down type (by tracking) overvoltage characteristic. Recovery time to reset 40 seconds minimum
3) Source component 2x source frequency and switching component approximately 150 KHz, 10 to 100% load and ambient Ta = 25°C
4) Measure with a 50MHz bandwidth, 10 to 100% load and ambient Tc= 25°C
5) Output voltage setting = ±1%
6) A step load change from 50% to 100% of rated load current (with the following tr, tf load changes) produces no more than the output
voltage excursions listed in the above table. The load change will be 5A/µs for Io>20A and 1A/µs for I<20A tr, tf of load change : 3.3v and
5v>30µs, 12v>12.5µs, 15v>10µs, 24v>6.5µs, 28v>5.5µs, 48v>3.2µs,
7) Recommended (using internal adjustment pot, par. 3.4). Using external pot (par.3.5) range = 10% to 110% of rated output voltage.