KEPCO FAW 5-20K Instruction Manual

I N S T R U C T I O N M A N U A L
KEPCO
HIGH FREQUENCY SWITCHING POWER SUPPLIES
I — INTRODUCTION
The Kepco FAW 100 Watt Series low profile high frequency switching power supplies employ forward conversion and operate with a 78% effi-
ciency with either a-c or d-c input. A resistor and thyristor soft-start circuit limits start-up surge. Surface mount technology permits efficient
component layout for minimum mounting space. Six models may be selected for outputs of 5, 12, 15, 24, 28, or 48V. "POWER OK" logic and a
green "POWER OK" LED are provided. A steel cover (Model CA 27) is available as an option. Output voltage may be adjusted with a trimmer
accessible near the input-output terminal strip (R65, see Figure 4, View "A"). When the input is cut off, the output is maintained for 15 millisec-
onds minimum. If the power supply shuts down, it is then necessary to wait 90 seconds minimum (120V a-c input) or 120 seconds minimum
(240V a-c input) before reconnecting the a-c input power to turn on the unit again. EMI filtering meets FCC Class B (100 to120 Volts) rating
and VDE 0871 Class B (220 to 240 Volts) rating. This page contains specifications for each model of the FAW 100 Watt Series. Environmental
specifications for each model are the same.
II — SPECIFICATIONS
The following specifications apply to FAW 100 Watt Series models. Other FAW Series models are also available; consult your Kepco represen-
tative for their specifications.
MODEL
OUTPUT VOLTS, d-c (NOMINAL)
ADJUSTMENT RANGE
OUTPUT CURRENT (NOMINAL)
OUTPUT POWER (MAXIMUM)
source (typ)
RIPPLE
source (max)
AND
NOISE
switching (typ)
(mV p-p)
0-50°C
switching (max)
10-100% LOAD
spike noise (d-c—50MHz)
OVERVOLTAGE SETTING (25 °C, NOM. INPUT)
OVERCURRENT SETTING (25°C, NOM. INPUT)
Rectangular type characteristic
(1) Derates same as Ouptut Power.
(2) See power derating curve, Figure 1.
INPUT:
Voltage: 120V a-c/240V a-c nominal; Range 85-264V a-c; 105-370V d-c (polarity insensitive).
Frequency: Nominal 50-60 Hz; Range 47-440Hz (at 440Hz leakage current exceeds UL/VDE safety leakage standards).
Current (nominal output at rated load): @120V a-c rms: 2.0A typ., 2.4A max; @240V a-c rms: 1.0A typ., 1.6A max.
Initial Turn-on Surge: (one-half of first input cycle): @120V a-c rms, 25A max; @240V a-c rms, 50A max. When the a-c input power is
removed, the soft start circuit requires 30 seconds recovery time before the a-c input power is reconnected.
Brownout Voltage: 80V a-c, 97V d-c.
Switching Frequency: 150KHz typical, nominal load.
STABILIZATION:
Source Effect: Range 85-132V a-c or 170-264V a-c, 1.0% typ.; 2.0% max.
Load Effect: Range 10%-100% load, 1.0% typ.; 2.0% max.
Temperature Effect: Range 0
Combined Effect: 2.0% typ.; 4.0% max. (includes source, load, and temperature effects).
Time Effect: 0.1% typ.; 0.5% max. (1/2 hr-8 hr at 25
RECOVERY CHARACTERISTICS:
to within +1% of the original setting in <1 ms (t
START-UP TIME:
200 ms. maximum.
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11352 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
©1995, KEPCO, INC
Data subject to change without notice
An ISO 9001 Company.
KEPCO SINGLE OUTPUT 100 WATT
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, FAW 100W SERIES
FAW 5-20K
5V
4.5 - 5.5V
(1)
20A
(2)
100W
10
15
30
65
<120
6.0-6.9V
21.0 - 24.0A
o o
to 50 C, 1.0% typ.; 2.0% max.
o
A step load change from 50% to 100% produces less than +4% output excursion. Recovery occurs
or t equal to or greater than 50
r f
http://www.kepcopower.com " email: hq@kepcopower.com
FAW 12-8.3K FAW 15-6.6K
12V 15V
10.8 - 13.2V 13.5 - 16.5V
8.3A 6.6A
99.6W 99W
15 15
30 40
35 40
70 80
<190 <220
13.7-15.7V 17.0-19.0V
8.7 - 10.0A 7.0 - 8.0A
C).
µ
sec at load change).
228-1158
FAW
FAW 24-4.2K FAW28-3.5K
24V 28V
21.6 - 26.4V 25.2 - 30.8V
4.2A 3.5A
100.8W 98W
20 20
40 40
50 60
110 140
<310 <330
27.0-30.5V 32.0-35.0
4.4 - 5.2A 3.7 - 4.2A
FAW 48-2K
48V
38.4 - 52.8V
2.0A
96W
20
40
80
220
<530
53.5-60.0
2.1 - 2.4A
1