KEPCO RKW 100W Series Operator Manual User Manual

100w series, Kepco, I — introduction

Data subject to change without notice

228-1445 REV 9

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

100W SERIES

100 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 100W
Series of Open Frame, PFC (Power Factor Corrected),
RoHS (Reduction of Hazardous Substances) compliant
switching power supplies.

DESCRIPTION. The Kepco RKW 100W 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 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 fac-
tor and efficiency specifications may not be met.). They will
also operate on 110V to 370V d-c input. The RKW 100W
Series employs a forward converter with a fixed switching
frequency of 135kHz. Power Factor Correction (PFC) is
provided by a boost converter operating at 80kHz. Regula-
tion is provided by pulse width modulation. A thermistor cir-

cuit prevents excessive turn-on current surge. Remote
programming of output voltage using an external resistance
can be implemented. Overvoltage and overcurrent protec-
tion is provided. Current limiting with automatic recovery
from short circuit is featured. Units are convection cooled L-
chassis construction. A steel cover (Model CA 35-R) is
available as an option (contact factory for derating with
cover).

Specifications and operating limits for individual RKW
100W models are listed in Table 1, Section II describes
RKW 100W features. Section III contains specifications and
operating limits common to all RKW 100W Series Models.
Section IV describes installation and Section V describes
operation.

TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RKW 100W SERIES

MODEL

RKW 3.3-25K

RKW 5-20K

RKW 12-8.5K

RKW 15-7K

RKW 24-4.5K

RKW 28-3.8K

RKW 48-2.1K

OUTPUT VOLTS, d-c

3.3V

12V

15V

24V

28V

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 (AMPS)

-10 to +50 °C

8.5

4.5

(5)

3.8

2.1

CURRENT LIMIT

(2)

(AMPS)

26.25 min

21 min

8.92 min

7.35 min

6.82 min

3.99 min

2.2 min

SHORT CIRCUIT CURRENT

(2)

(AMPS)

37.5

27.5

11.5

7.5

4.5

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

EFFICIENCY

100 Va-c

74%

77%

80%

81%

83%

240 Va-c

77%

82%

84%

85%

86%

RIPPLE

AND

NOISE

(3)

(mV p-p)

Switching ripple

(typ)

100

130

spike noise

(typ)

(2)

120

150

200

External Potentiometer

(4)

1K 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 1 from 50 ~ 65°C

(4)

Used for remote programming of output voltage. See Section IV OPERATION, REMOTE VOLTAGE PROGRAMMING.

(5)

Peak Current: 6.5A (useful for motor start applications). Thermal protection (24V model only) cuts off output voltage if overtemperature detected;
after sufficient cooling, output voltage returns automatically.

Table of contents

KEPCO RKW 100W Series Operator Manual User Manual

100w series, Kepco, I — introduction

Document Outline