KEPCO FAW 5-20K, FAW 12-8.3K, FAW 15-6.6K, FAW 24-4.2K, FAW28-3.5K Instruction Manual

INSTRUCTION MANUAL

KEPCO

An ISO 9001 Company.

FAW

KEPCO SINGLE OUTPUT 100 WATT

HIGH FREQUENCY SWITCHING POWER SUPPLIES

I — INTRODUCTION

The Kepco FAW 100 Watt Series low profile high frequency switching power supplies employ forward conversion and operate with a 78% effi­ciency with either a-c or d-c input. A resistor and thyristor soft-start circuit limits start-up surge. Surface mount technology permits efficient
component layout for minimum mounting space. Six models may be selected for outputs of 5, 12, 15, 24, 28, or 48V. “POWER OK” logic and a
green “POWER OK” LED are provided. A steel cover (Model CA 27) is available as an option. Output voltage may be adjusted with a trimmer
accessible near the input-output terminal strip (R65, see Figure 4, View “A”). When the input is cut off, the output is maintained for 15 millisec­onds minimum. If the power supply shuts down, it is then necessary to wait 90 seconds minimum (120V a-c input) or 120 seconds minimum
(240V a-c input) before reconnecting the a-c input power to turn on the unit again. EMI filtering meets FCC Class B (100 to120 Volts) rating
and VDE 0871 Class B (220 to 240 Volts) rating. This page contains specifications for each model of the FAW 100 Watt Series. Environmental
specifications for each model are the same.

II — SPECIFICATIONS

The following specifications apply to FAW 100 Watt Series models. Other FAW Series models are also available; consult your Kepco represen­tative for their specifications.

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

MODEL FAW 5-20K FAW 12-8.3K FAW 15-6.6K FAW 24-4.2K FAW28-3.5K FAW 48-2K

OUTPUT VOLTS, d-c (NOMINAL) 5V 12V 15V 24V 28V 48V

ADJUSTMENT RANGE 4.5 - 5.5V 10.8 - 13.2V 13.5 - 16.5V 21.6 - 26.4V 25.2 - 30.8V 38.4 - 52.8V

OUTPUT CURRENT (NOMINAL)

OUTPUT POWER (MAXIMUM)

RIPPLE

AND

NOISE

(mV p-p)

0-50°C

10-100% LOAD

OVERVOLTAGE SETTING (25 °C, NOM. INPUT) 6.0-6.9V 13.7-15.7V 17.0-19.0V 27.0-30.5V 32.0-35.0 53.5-60.0

OVERCURRENT SETTING (25°C, NOM. INPUT)

Rectangular type characteristic

(1) Derates same as Ouptut Power.
(2) See power derating curve, Figure 1.

source (typ)101515202020

source (max) 15 30 40 40 40 40

switching (typ)303540506080

switching (max) 65 70 80 110 140 220

spike noise (d-c—50MHz) <120 <190 <220 <310 <330 <530

INPUT:

Voltage: 120V a-c/240V a-c nominal; Range 85-264V a-c; 105-370V d-c (polarity insensitive).
Frequency: Nominal 50-60 Hz; Range 47-440Hz (at 440Hz leakage current exceeds UL/VDE safety leakage standards).
Current (nominal output at rated load): @120V a-c rms: 2.0A typ., 2.4A max; @240V a-c rms: 1.0A typ., 1.6A max.
Initial Turn-on Surge: (one-half of first input cycle): @120V a-c rms, 25A max; @240V a-c rms, 50A max. When the a-c input power is

removed, the soft start circuit requires 30 seconds recovery time before the a-c input power is reconnected.
Brownout Voltage: 80V a-c, 97V d-c.
Switching Frequency: 150KHz typical, nominal load.

(1)

(2)

20A 8.3A 6.6A 4.2A 3.5A 2.0A

100W 99.6W 99W 100.8W 98W 96W

21.0 - 24.0A 8.7 - 10.0A 7.0 - 8.0A 4.4 - 5.2A 3.7 - 4.2A 2.1 - 2.4A

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
Combined Effect: 2.0% typ.; 4.0% max. (includes source, load, and temperature effects).
Time Effect: 0.1% typ.; 0.5% max. (1/2 hr-8 hr at 25

RECOVERY CHARACTERISTICS:

to within +

START-UP TIME:

©1995, KEPCO, INC 228-1158
Data subject to change without notice

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

200 ms. maximum.

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o

to 50oC, 1.0% typ.; 2.0% max.

o

C).

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

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HOLD-UP TIME:

DIELECTRIC STRENGTH:

Between input and output: 2KV a-c for one minute.
Between input and output with Y-capacitor removed: 3.0KV a-c for one minute.
Between input and case (ground): 2.0KV a-c for one minute.

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

INSULATION RESISTANCE:

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

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

LEAKAGE CURRENT

(UL method, 120V a-c, 50-60Hz, single terminal connection): 0.5 mA maximum.
(VDE method, 240V a-c, two terminal connection): 0.75 mA maximum.

SAFETY:

IEC 950 Approved by TÜV Rheinland (based on EN 60950/09.87, ambient temperature 50° C max.) - cover removed.

(+) SENSE, (–) SENSE:

Sense terminals must be connected to their respective (+) and (–) output terminals, either at the load or at the Power Supply output termi­nals. The connection ensures the most accurate error tracking. Error compensation in the connecting wires is up to 0.25 Volts for the FAW
5-20K model, and up to 0.4 Volts for all other models.

“POWER OK” SIGNAL OUTPUT:

CONNECTOR TYPES:

P/N TC100F-2.

CONNECTOR KIT:

Kepco Model Kit P/N 518-0029. The connector is provided with 1 meter length leads for trimming to desired lengths.

EMI:

VIBRATION:

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

SHOCK:

Acceleration: 20g
Duration: 11ms +

UL 1950 recognized (ambient temperature 40° C maximum); CSA E.B. 1402C Level 3 Certified (FAW 48-2K Level 1 Certified);

See Figure 3. These terminals are provided to compensate for voltage drops in the load connecting wires. The

The unit supplies a “POWER OK” logic 1 signal at CP51 (see Figure 2 and Figure 4, View “A”).

Refer to the Mechanical Outline Drawing. The mating connector for CP51 is a Panduit, P/N CT10F22-2: Cover,

Kepco furnishes an optional connector kit with the specified connector listed above. The kit may be ordered under

Designed to meet FCC Class B (100-120V a-c) and VDE 0871 Class B (220-240V a-c).

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

(non-operating, one-half sinusoidal pulse, three shocks to each axis):

5ms

OPERATING TEMPERATURE:

STORAGE TEMPERATURE:

0 - 71° C (see Figure 1).

–40oC to +75oC.

OPERATING AND STORAGE RELATIVE HUMIDITY:

MOUNTING SCREW:

MAXIMUM SCREW PENETRATION:

WEIGHT:

DIMENSIONS:

2.20 lbs. (1.0Kg max.), 3.31 lbs. (1.5 Kg max. with cover).

3.74 in. (95mm) H x 1.38 in. (35mm) W x 7.87 in. (200 mm) L

CASE DIMENSIONS:

FRAME MATERIAL:

FUSE:

WARRANTY:

Quick acting 5.0A, 250V; (5.2 x 20mm), San-O P/N EQ5.0A; Kepco P/N 541-0112.

1 year.

No. 4-40 UNC Thread (see Figure 4)

0.197 in. (5mm) max.

3.74 in. (95mm) H x 1.50 in. (38mm) W x 7.87 in. (200 mm) L

Aluminum

up to 95% (wet bulb temp. <35oC non-condensing).

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FIGURE 1. % OUTPUT POWER RATING VS.

AMBIENT TEMPERATURE

FIGURE 2. POWER OK” SIGNAL RELATED TO OUTPUT

FIGURE 3. LOAD CONNECTIONS WITH ERROR SENSING

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3040229/228/374

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FIGURE 4. MECHANICAL OUTLINE DRAWING

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CM18670

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