©2010, KEPCO, INC
1
Data subject to change without notice
228-1449 REV 5
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]
I N S T R U C T I O N M A N U A L
KEPCO
An ISO 9001 Company.
RKW
30W SERIES
30 WATT SINGLE OUTPUT
OPEN FRAME POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL.
This instruction manual covers
the installation and operation of the Kepco RKW 30W
Series of Open Frame, RoHS (Reduction of Hazardous
Substances) compliant, switching power supplies.
DESCRIPTION.
The Kepco RKW 30W Series consists of
six models of switching power supplies, with a single output
as shown in Table 1. Units may be operated with a nominal
100V a-c to 240V a-c (input voltage range 85 to 265 Va-c),
50-60 Hz
(input frequency range 47-66Hz; units operate up to
440Hz although leakage current and efficiency specifications may
not be met).
They will also operate on 110V to 370V d-c
input. The RKW 30W Series employs a MOSFET switch
flyback converter with a fixed switching frequency of
approximately 60kHz. Regulation is provided by pulse
width modulation. A thermistor prevents excessive turn-on
current surge. Overvoltage and overcurrent protection is
provided. Current limiting with automatic recovery from
short circuit is featured. Units are convection cooled L-
chassis construction. A steel cover (Model CA 33-R) is
available as an option (contact factory for derating with
cover).
Specifications and operating limits for individual RKW 30W
models are listed in Table 1. Section II describes RKW 30W
features. Section III contains specifications and operating
limits common to all RKW 30W Series Models. Section IV
describes installation and Section V describes operation.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RKW 30W SERIES
MODEL
RKW 3.3-7K
RKW 5-6K
RKW 12-2.5K
RKW 15-2K
RKW 24-1.3K
RKW 48-0.65K
OUTPUT VOLTS, d-c
3.3V
5V
12V
15V
24V
48V
ADJUSTMENT RANGE, Vd-c
2.85-4.0
4.0-5.8
9.6-13.2
12-16.5
19.2-26.4
38.4-52.8
OUTPUT CURRENT (AMPS)
-10 to +50 °C
7.0
6.0
2.5
2.0
1.3
(4)
0.65
CURRENT LIMIT
(1)
(AMPS)
7.9 min
6.3 min
2.6 min
2.1 min
2.1 min
0.68 min
OVP SETTING
(2)
(VOLTS)
4.2-5.2
6.0-6.9
13.7-15.7
17.0-19.0
27.0-30.5
55.0-60.0
EFFICIENCY
100 Va-c
75%
77%
81%
81%
84%
84%
200 Va-c
76%
78%
82%
83%
85%
85%
RIPPLE
AND
NOISE
(3)
(mV p-p)
Switching ripple
(typ)
80
80
100
100
100
130
spike noise
(typ)
(1)
120
120
150
150
150
200
(1)
After the cause of the overload is removed, output is automatically restored.
(2)
An overvoltage shuts down the output. Recover by recycling a-c input (60 second delay required before resetting).
(3)
Bandwidth 100 MHz. Ripple and noise will be approximately 1.5 times these values in the operating temperature range -10 ~ 0°C. The
ripple and noise values tabulated are valid when the output is derated as shown in figure 2 from 50 ~ 65°C.
(4)
Peak Current: 2.0A (useful for motor start applications).
