KEPCO RKW 50W Series Operator Manual - Manual

©2010, KEPCO, INC 1
Data subject to change without notice 228-1448 REV 8
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
50W SERIES
50 WATT SINGLE OUTPUT, PFC,
OPEN FRAME POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers
the installation and operation of the Kepco RKW 50W
Series of Open Frame. PFC (Power Factor Corrected),
RoHS (Reduction of Hazardous Substances) compliant
switching power supplies.
DESCRIPTION. The Kepco RKW 50W 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, power factor and effi-
ciency specifications may not be met.) They will also oper-
ate on 110V to 370V d-c input. The RKW 50W Series
employs a forward converter with a fixed switching fre-
quency of approximately 140kHz. Power Factor Correction
(PFC) is provided by a boost converter operating at 80kHz.
Regulation is provided by pulse width modulation. A therm-
istor circuit prevents excessive turn-on current surge.
Remote programming of output voltage using an external
resistance can be implemented. Overvoltage and overcur-
rent 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 34-R) is available as an option (contact factory for der-
ating with cover).
Specifications and operating limits for individual RKW 50W
models are listed in Table 1. Section II describes RKW 50W
features. Section III contains specifications and operating
limits common to all RKW 50W Series Models. Section IV
describes installation and Section V describes operation.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RKW 50W SERIES
MODEL RKW 3.3-12K RKW 5-10K RKW 12-4.3K RKW 15-3.5K RKW 24-2.2K RKW 48-1.1K
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
12.5 10 4.3 3.5 2.2 (5) 1.1
CURRENT LIMIT
(2)
(AMPS) 13.1 min 10.5 min 4.5 min 3.6 min 3.3 min 1.15 min
SHORT CIRCUIT CURRENT
(2)
(AMPS) 16.0 12.6 5.6 5.4 6.2 2.4
OVP SETTING
(1)
(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 71% 75% 78% 78% 79% 80%
200 Va-c 73% 78% 80% 80% 82% 83%
RIPPLE
AND
NOISE
(3)
(mV p-p)
Switching ripple (typ) 80 80 100 100 100 130
spike noise (typ)
(2) 120 120 150 150 150 200
External Potentiometer
(4) 1K Ohms 1K Ohms 2K Ohms 2K Ohms 5K Ohms 10K Ohms
(1) An overvoltage shuts down the output. Recover by recycling a-c input (30 second delay required before resetting).
(2) The current limit is rectangular. After the overload is removed, output is automatically restored.
(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) Used for remote programming of output voltage. See Section IV OPERATION, REMOTE VOLTAGE PROGRAMMING.
(5) Peak Current: 3.2A (useful for motor start applications). Thermal protection (24V model only) cuts off output voltage if overtemperature
detected; after sufficient cooling, recover by cycling a-c input.