KEPCO RTW 150W - Manual

©2011, KEPCO, INC 1
Data subject to change without notice 228-1559 REV 7
I N S T R U C T I O N M A N U A L
KEPCO
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]
An ISO 9001 Company.
RTW
150W
150 WATT SINGLE OUTPUT, PFC,
OPEN FRAME POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers the installation and operation of the Kepco RTW 150W Series of Open Frame PFC
(Power Factor Corrected) RoHS (Reduction of Hazardous Substances) compliant Switching Power Supplies.
DESCRIPTION. The Kepco RTW 150W Series consists of seven models of switching power supplies, with a single output as shown in Table
1. Units may be operated with a nominal 100 to 120V a-c and 200 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 efficiency specifications may not be met). They will also
operate on 120V to 370V d-c input. The RTW 150W Series employs a forward converter with a fixed switching frequency of 145KHz. Power
Factor Correction (PFC) is provided by a boost converter. Regulation is provided by pulse width modulation. A thermistor circuit prevents
excessive turn-on current surge. Remote on-off and remote programming of output voltage using an external resistance can be implemented.
Overvoltage, overcurrent and overtemperature protection is provided. Current limiting with automatic recovery from short circuit is featured.
Units are convection cooled L-chassis construction. Models with a factory-installed steel cover are indicated by a C suffix following the model
number (e.g., RTW 5-30KC).
Section II contains specifications and operating limits of individual RTW 150W Series models (Table 1) as well as specifications and operating
limits common to all RTW 150W Series Models. Section III describes installation and Section IV describes operation
II — SPECIFICATIONS
The following specifications are at rated input voltages at 25°C unless otherwise specified.
INPUT VOLTAGE: Operation at input voltage outside the recommended range may result in component degradation.
Nominal 100-120V a-c, 200-240V a-c, range: 85-265V a-c (0 to 100% load, -10 to 71°C).
d-c range: 120 -370V d-c.; polarity insensitive. Safety agency approval applies only to a-c input operation.
INPUT SOURCE FREQUENCY:
Nominal 50/60 Hz; Range 47-440 Hz (0 to 100% load, -10 to 71°C). (Units operate up to 440 Hz, however the leakage current exceeds the
UL leakage safety specification limit, and power factor and efficiency specifications may not be met.)
INPUT CURRENT:
5V-48V models: 1.9A rms max. (100-120 Va-c input, 100% load); 1.0A rms max. (200-240 Va-c input, 100% load).
24V model at peak output: 2.7A rms typ. (100 Va-c input); 1.1A rms typ. (240 Va-c input).
3.3V model: 1.6 rms max. (100-120 Va-c input, 100% load); 0.85A rms max. (200-240 Va-c input, 100% load).
INPUT PROTECTION AND SOFT START: A thermistor circuit reduces start-up surge. Units are protected against shorts by an input
fuse. Fuse value 5A, 250V.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RTW 150W SERIES
MODEL
(8) RTW 3.3-35K RTW 5-30K RTW 12-12K RTW 15-10K RTW 24-6.3K RTW 28-5.4K RTW 48-3.2K
OUTPUT VOLTAGE SETTING, d-c 3.3 ±0.03V 5 ±0.05V 12 ±0.12V 15 ±0.15V 24 ±0.24V 28 ±0.28V 48 ±0.48V
ADJUSTMENT RANGE, Vd-c 2.85-4.0 4.0-5.8 9.6-13.2 12-16.5 19.2-26.4 22.4-30.8 38.4-52.8
OUTPUT CURRENT, MAX (AMPS) 35 30 12.5 10 6.3 (5) 5.4 3.2
OUTPUT POWER, MAX
(3)
(WATTS) 115.5 150.0 150.0 150.0 151.2 151.2 153.6
OVP SETTING
(1)
(VOLTS)
4.2-5.2 6.0-6.9 13.7-15.7 17.0-19.0 27.0-30.5 32.0-35.0 55.0-60.0
OVERCURRENT SETTING
(2)
(AMPERES)
38.5-45.5 33.0-39.0 13.7-16.3 11.0-13.0 10.5-13.5 5.94-7.02 3.52-4.16
EFFICIENCY
100 Va-c 80% 83% 84% 84% 86% 86% 86%
200 Va-c 83% 86% 87% 87% 88% 88% 89%
RIPPLE
AND
NOISE
(mV p-p(4))
Switching ripple (typ) 80 80 100 100 150 150 200
spike noise (typ)
(6) 120 120 150 150 200 200 300
External Potentiometer
(7) 500 Ohms 500 Ohms 750 Ohms 1K Ohms 1.5K Ohms 2K Ohms 5K Ohms
(1) Overtemperature or overvoltage shuts down the output. Recover
by recycling a-c input (30 second delay required before resetting).
(2) Hiccup mode operation. After the cause of overcurrent is
removed, output voltage recovers automatically.
(3) See Figure 1 for temperature and input voltage rating.
(4) Bandwidth 100MHz.
(5) Peak current: 10A (useful for motor start applications). Thermal
protection (24V model only) cuts off output voltage if overtempera-
ture detected; after sufficient cooling; recover by cycling a-c input.
(6) 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 1 from 40 ~ 71°C.
(7) Used for remote programming of output voltage. See Section IV OPERATION,
REMOTE VOLTAGE PROGRAMMING.
(8) Specifications apply to models with K (no cover) and KC (cover installed) suf-
fixes.