KEPCO JBW 50W Series - Manual

©2010, KEPCO, INC 1
Data subject to change without notice 228-1511 REV 1
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
http://www.kepcopower.com email: [email protected]
O P E R A T O R M A N U A L
KEPCO
An ISO 9001 Company.
JBW
50W SERIES
50 WATT SINGLE OUTPUT
SWITCHING POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers
the installation and operation of the Kepco JBW 50W
Series of RoHS (Reduction of Hazardous Substances)
compliant Switching Power Supplies.
DESCRIPTION. The Kepco JBW 50W Series consists of
four models of switching power supplies, each with a single
output as shown in Table 1. Units may be operated with a
nominal 100 to 120V a-c and 220 to 240V a-c (input voltage
range 85 to 265 Va-c), 50-60 Hz (input frequency range 47-
440Hz.) They will also operate on 110V to 370V d-c input.
The JBW 50W Series employs a light weight ferrite core.
Regulation is provided by pulse width modulation. A FET
power stage, operating as a forward converter with a fixed
switching frequency of 140KHz provides a smooth isolated
d-c output. A thermistor circuit prevents excessive turn-on
current surge. Overvoltage protection is provided. Current
limiting with automatic recovery from short circuit is fea-
tured. Units are manufactured on an open frame PC board.
Table 1 contains specifications and operating limits of indi-
vidual JBW 50W Series models. Section II (following) con-
tains specifications and operating limits common to all JBW
50W Series Models
II — SPECIFICATIONS
The following specifications are at nominal input voltages
and 25°C and apply to all models unless otherwise speci-
fied.
INPUT CHARACTERISTICS:
INPUT VOLTAGE: (0 to 100% load, -10 to 60°C)
Nominal 100-120V a-c, 220-240V a-c
Range: 85-265V a-c, 110 -370V d-c
NOTE: The power supply may shut down if operated at
below the input voltage range or if the input voltage
increases slowly at start up (> 1 second). To reset the
power supply, unplug the unit, wait one minute and
reapply input power.
INPUT SOURCE FREQUENCY:
Nominal 50/60 Hz;
Range 47-440 Hz (Above 66Hz to 440 Hz the leakage
current may exceed the VDE safety specification limit,)
INPUT CURRENT: (100% load at 25°C with nominal out-
put voltage):
100V a-c input:
All except 24V Model: 0.7A typ., 0.88A max.
24V Model: 0.8A typ., 0.88A max.
240V a-c input: 0.35A typ., 0.5A max.
INPUT PROTECTION AND SOFT START: A thermis-
tor circuit reduces start-up surge. Units are protected
against shorts by an input fuse. Fuse value 3.15A,
250V.
INPUT SURGE: Cold start:
100V a-c input, 100% load: 15A typ., 30.0A max.
240V a-c input, 100% load: 40A typ., 60.0A max.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, JBW 50W SERIES
MODEL JBW 05-10R JBW 12-4R3 JBW 15-3R5 JBW 24-2R1
OUTPUT VOLTS, d-c 5V 12V 15V 24V
ADJUSTMENT RANGE 4.5-5.5V 10.8-13.2V 13.5-16.5V 21.6-26.4V
CURRENT/POWER
RATINGS
10.0A/50W 4.3A/51.6W 3.5A/52.5W 2.1A(1)/50.4W
CURRENT LIMIT (AMPS) 10.5 min 5.4 min 4.4 min 3.0 min
OVP RANGE (VOLTS) 5.75-6.9 13.8-16.8 17.2-21.0 27.6-33.6
EFFICIENCY
100 Va-c 77% 80% 80% 81
240 Va-c 79% 81% 81% 83%
ACCEPTABLE EXTERNAL OUTPUT CAPACITOR
µFmax., (fixed load resistance)
10,000 10,000 10,000 10,000
RIPPLE AND
NOISE
(2)
(mV p-p)
ripple (typ) 80 120 120 120
ripple (typ) (-10 to 0 °C) 140 160 160 160
spike noise (typ) 120 150 150 150
spike noise (typ)
(-10 to 0 °C)
160 180 180 180
(1) 2.6A peak, t
≤
10 seconds, not to exceed 2.1A rms, output power
≤
50.4W.
(2) 0 to 100% load, 0 to 60 °C, tested with 100µF electrolytic and 0.1µF film capacitors across the measuring points, connected to the power supply
via 5.9 in (150mm) wires; oscilloscope bandwidth
≤
20MHz.