KEPCO FAK 25W User Manual

INSTRUCTION MANUAL

KEPCO

KEPCO 25 WATT HIGH FREQUENCY

An ISO 9001 Company.

FAK

SWITCHING POWER SUPPLIES

I — INTRODUCTION

The Kepco FAK 25 Watt Series low profile high frequency switching power supplies employ forward conversion and operate at 80% efficiency
with either a-c or d-c input. A thermistor soft-start circuit limits start-up surge. Surface mount technology permits efficient compact topology for
minimum mounting space. Four models may be selected for outputs of 5, 12, 15 or 24V. A green “POWER OK” light is provided. A steel cover
(Model CA 22 ) is av ailabl e as an o ptio n. Outpu t volt age m ay be ad justed with a trimm er acc essibl e near the in put- output barri er strip. When
the input is cut off, the output is maintained for 20–30 milliseconds (30 milliseconds typical). EMI filtering meets FCC Class B rating. Table 1
contains specifications for each model of the FAK 25 Watt Series. Environmental specifications for each model are the same.

II — SPECIFICATIONS

The following specifications apply to FAK 25 Watt Series models.

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

MODEL FAK 5-5K FAK 12-2.1K FAK 15-1.7K FAK 24-1.1K

OUTPUT VOLTS, d-c (NOMINAL)

ADJUSTMENT RANGE

OUTPUT CURRENT (NOMINAL)

OUTPUT POWER (MAXIMUM)

RIPPLE

AND

NOISE

(mV p-p)

0-50°C

10-100% LOA D
OVERVOLTAGE SETTING 25°C, NOM. INPUT

OVERCURRENT SETTING 25°C, NOM. INPUT

INPUT:

Voltage: 115V a-c nominal; Range 85-132V a-c; 110-170V d-c.
Frequency: Nominal 50-60 Hz; Range 47-440Hz (at 440Hz leakage current exceeds UL safety spec. limit).
Current: 0.5A typ., 0.65A max. (nominal output at rated load @25° C).
Initial Turn-on Surge: 43A max. (one-half of first input cycle).

STABILIZATION:

Source Effect: 0.6% typ.; 2.0% max. from minimum to maximum input.
Load Effect: 1.2% typ.; 3.0% max. (range: 10%-100% load).
Temperature Effect: 0.6% typ.; 2.0% max. (range: 0
Combined Effect: ±1.0% typ.; ±3.0% max. (includes source, load, and temperature effects).
Drift: 0.1% typ.; 0.5% max. (1/2 hr—8 hr at 25

RECOVERY CHARACTERISTICS:

within +1% of the original setting in <1 ms (tr or tf equal to or greater than 50µsec at load change).

START-UP TIME:
HOLD-UP TIME:
DIELECTRIC STRENGTH:

Between input and output: 2KV a-c for one minute.
Between input and ground terminals: 2KV a-c for one minute.

LEAKAGE CURRENT
SAFETY:
EMI:
VIBRATION:

SHOCK:

OPERATING TEMPERATURE:
STORAGE TEMPERATURE:
OPERATING AND STORAGE RELATIVE HUMIDITY:
FUSE:
WARRANTY:

©1996, KEPCO, INC
Data subject to change without notice

UL 478 recognized; CSA 1402 certified.

Designed to meet FCC 20780. Class B.

5-10 Hz, 10 mm amplitude.
10-55 Hz, 2g acceleration.

(non-operating, one-half sinusoidal pulse, three shocks to each axis):
Acceleration: 20g
Duration: 11ms +

Medium acting 2.5A, 125V; (5.2 x 20mm), Nagasawa P/N GGS2.5A; Kepco P/N 541-0058.

KEPCO, INC. !"! 131-38 SANFORD AVENUE !" FLUSHING, NY. 11352 U.S.A.!" TEL [phone]!"

100 ms. maximum.

30 ms. typ. (20 ms. min).

(UL method, 115V a-c, 50-60Hz): 0.5 mA maximum.

(non-operating, one hour on each one of the three axes):

5ms

1 year.

source (typ)

source (max)

switching (typ)

switching (max)

spike noise (d-c—50MHz)

o

C).

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

See Figure 1.

-40oC to +75oC.

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5.0V 12.0V 15.0V 24.0V

4.5-5.5V 10.8-13.2V 13.5-16.5V 21.6-26.4V

5.0A 2.1A 1.7A 1.1A

25.0W 25.2W 25.5W 26.4W
10 10 10 10
30 30 30 30
30 30 30 30
70 70 70 80

120 190 220 310

6.0-6.9V 13.7-15.7V 17.0-19.0V 27.0-30.5V

5.5-7.5A 2.3-3.3A 1.9-2.8 1.2-1.8

o

to 50oC).

FIGURE 1. OUTPUT POWER VS. AMBIENT

20%–95% (non-condensing).

228-1160

TEMPERA TURE

!

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3040229

1

MECHANICAL OUTLINE DRAWING

KEPCO, INC. !"! 131-38 SANFORD AVENUE !" FLUSHING, NY. 11352 U.S.A.!" TEL [phone]!"

2

3040438

http://www.kepcopower.com "! email: [e-mail]

228-1160 062599

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FAX [phone]!!