KEPCO FAW 25W Series User Manual

Kepco, I — introduction, Ii — specifications

Data subject to change without notice

228-1162

I N S T R U C T I O N M A N U A L

FAW

KEPCO

KEPCO, INC. !"! 131-38 SANFORD AVENUE !" FLUSHING, NY. 11352 U.S.A.!!" TEL (718) 461-7000!!"! FAX (718) 767-1102!!

http://www.kepcopower.com "! email: [email protected]

An ISO 9001 Company.

KEPCO SINGLE OUTPUT 25 WATT

HIGH FREQUENCY SWITCHING POWER SUPPLIES

I — INTRODUCTION

The Kepco FAW 25 Watt Series low profile high frequency switching power supplies employ flyback conversion and operate with a 70% efficiency with
either a-c or d-c input. A thermistor soft-start circuit limits start-up surge. Surface mount technology permits efficient component layout for minimum
mounting space. Four models may be selected for outputs of 5, 12, 15 or 24V. “POWER OK” logic and a green “POWER OK” light are provided. A steel
cover (Model CA 25) is available as an option. Output voltage may be adjusted with a trimmer accessible near the input-output terminal strip. When the
input is cut off, the output is maintained for 15 milliseconds minimum. EMI filtering meets FCC Class B rating and VDE 0871 Class B rating. This page
contains specifications for each model of the FAW 25 Watt Series. Environmental specifications for each model are the same.

II — SPECIFICATIONS

The following specifications apply to FAW 25 Watt Series models. Other models are also available; consult your Kepco representative for their specifi-
cations.

INPUT:

Voltage: 120V a-c/240V a-c nominal; Range 85-264V a-c; 110-370V d-c.
Frequency: Nominal 50-60 Hz; Range 47-440Hz (at 440Hz leakage current exceeds UL/VDE safety spec. limit).
Current (nominal output at rated load): @120V a-c rms: 0.55A typ., 0.7A max; @240V a-c rms: 0.35A typ., 0.45A max.
Initial Turn-on Surge: (one-half of first input cycle): @120V a-c rms, 43A max., @240V a-c rms, 85A max.

STABILIZATION:

Source Effect: Range 85-132V a-c or 170-264V a-c, 1.0% typ.; 2.0% max.
Load Effect: Range 10%-100% load, 1.0% typ.; 2.0% max.
Temperature Effect: Range 0

to 50

C, 1.0% typ.; 2.0% max.

Combined Effect: 2.6% typ.; 4.0% max. (includes source, load, and temperature effects).
Drift: 0.1% typ.; 0.5% max. (1/2 hr-8 hr at 25

C).

RECOVERY CHARACTERISTICS:

A step load change from 50% to 100% produces less than +4% output excursion. Recovery occurs to within

+1% of the original setting in <2ms

or t

equal to or greater than 50

sec at load change).

START-UP TIME:

500 ms. maximum.

HOLDUP TIME:

15 ms. min (100V a-c), 20 ms. typ. (120V a-c).

DIELECTRIC STRENGTH:

Between input and output: 2KV a-c for one minute.
Between input and output with Y-capacitor removed: 3.75KV a-c for one minute.
Between input and case (ground): 2KV a-c for one minute.

INSULATION RESISTANCE:

Between input and ground, output and ground, input and output;

100 Megohms min. (500V d-c).

TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, FAW 25W SERIES

MODEL

FAW 5-5K

FAW 12-2.1K

FAW 15-1.7K

FAW 24-1.1K

OUTPUT VOLTS, d-c (NOMINAL)

12V

15V

24V

ADJUSTMENT RANGE

4.2-5.5V

10.8-13.2V

13.5-16.5V

21.6-26.4V

OUTPUT CURRENT (NOMINAL)

5.0A

2.1A

1.7A

1.1A

OUTPUT POWER (MAXIMUM)

25.0W

25.2W

25.5W

26.4W

RIPPLE

AND

NOISE

(mV p-p)

0-50°C

10-100% LOAD

source (typ)

source (max)

switching (typ)

switching (max)

115

spike noise (d-c—50MHz)

120

190

220

310

OVERVOLTAGE SETTING 25 °C, NOM. INPUT

6.0-6.9V

13.7-15.7V

17.0-19.0V

27.0-30.5V

OVERCURRENT SETTING 25 °C, NOM. INPUT

5.5-7.5A

2.3-3.3A

1.9-2.8A

1.2-1.8A

Table of contents

Document Outline

TABLE 1. output ratings and specifications, FAW 25w series