KEPCO JBW 50W User Manual

OPERATOR MANUAL

KEPCO

50 WATT SINGLE OUTPUT

An ISO 9001 Company.

JBW

50W SERIES

SWITCHING POWER SUPPLIES

I — INTRODUCTION

SCOPE OF MANUAL. This instruction manual covers

the installation and operation of the Kepco JBW 50W
Series of RoHS (Reduction of Hazardous Substances)
compliant Switching Power Supplies.

DESCRIPTION. The Kepco JBW 50W Series consists of four models of switching power supplies, each with a single output as shown in Table 1. Units may be operated with a nominal 100 to 120V a-c and 220 to 240V a-c (input voltage range 85 to 265 Va-c), 50-60 Hz (input frequency range 47­440Hz.) They will also operate on 110V to 370V d-c input. The JBW 50W Series employs a light weight ferrite core. Regulation is provided by pulse width modulation. A FET power stage, operating as a forward converter with a fixed switching frequency of 140KHz provides a smooth isolated

TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, JBW 50W SERIES

MODEL

OUTPUT VOLTS, d-c

ADJUSTMENT RANGE

CURRENT/POWER

RATINGS

CURRENT LIMIT (AMPS)

OVP RANGE (VOLTS)

EFFICIENCY

ACCEPTABLE EXTERNAL OUTPUT CAPACITOR

(1) 2.6A peak, t
(2) 0 to 100% load, 0 to 60 °C, tested with 100µF electrolytic and 0.1µF film capacitors across the measuring points, connected to the power supply

µFmax., (fixed load resistance)

RIPPLE AND

(2)

NOISE

(mV p-p)

≤ 10 seconds, not to exceed 2.1A rms, output power ≤ 50.4W.

via 5.9 in (150mm) wires; oscilloscope bandwidth

100 Va-c
240 Va-c

ripple (typ)

ripple (typ) (-10 to 0°C)

spike noise (typ)
spike noise (typ)

(-10 to 0

°C)

JBW 05-10R JBW 12-4R3 JBW 15-3R5 JBW 24-2R1

5V 12V 15V 24V

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

10.0A/50W 4.3A/51.6W 3.5A/52.5W

10.5 min 5.4 min 4.4 min 3.0 min

5.75-6.9 13.8-16.8 17.2-21.0 27.6-33.6
77% 80% 80% 81
79% 81% 81% 83%

10,000 10,000 10,000 10,000

80 120 120 120
140 160 160 160
120 150 150 150

160 180 180 180

≤ 20MHz.

d-c output. A thermistor circuit prevents excessive turn-on
current surge. Overvoltage protection is provided. Current
limiting with automatic recovery from short circuit is fea­tured. Units are manufactured on an open frame PC board.

Table 1 contains specifications and operating limits of indi­vidual JBW 50W Series models. Section II (following) con­tains specifications and operating limits common to all JBW
50W Series Models

II — SPECIFICATIONS

The following specifications are at nominal input voltages
and 25°C and apply to all models unless otherwise speci­fied.

(1)

2.1A

/50.4W

INPUT CHARACTERISTICS:

INPUT VOLTAGE: (0 to 100% load, -10 to 60°C)

Nominal 100-120V a-c, 220-240V a-c
Range: 85-265V a-c, 110 -370V d-c
NOTE: The power supply may shut down if operated at
below the input voltage range or if the input voltage
increases slowly at start up (> 1 second). To reset the
power supply, unplug the unit, wait one minute and
reapply input power.

INPUT SOURCE FREQUENCY:

Nominal 50/60 Hz;
Range 47-440 Hz (Above 66Hz to 440 Hz the leakage
current may exceed the VDE safety specification limit,)

KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A.  TEL [phone]  FAX [phone]

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©2010, KEPCO, INC 1
Data subject to change without notice 228-1511 REV 1

INPUT CURRENT: (100% load at 25°C with nominal out-

put voltage):
100V a-c input:
All except 24V Model: 0.7A typ., 0.88A max.
24V Model: 0.8A typ., 0.88A max.
240V a-c input: 0.35A typ., 0.5A max.

INPUT PROTECTION AND SOFT START: A thermis-

tor circuit reduces start-up surge. Units are protected
against shorts by an input fuse. Fuse value 3.15A,
250V.

INPUT SURGE: Cold start:

100V a-c input, 100% load: 15A typ., 30.0A max.
240V a-c input, 100% load: 40A typ., 60.0A max.

LEAKAGE CURRENT: Cold start:

100V a-c and 60 Hz (single pole switching) (operating
in conformance with Den-An):

0.75mA max, 0.35mA typ
240V a-c and 60 Hz (single pole switching in confor­mance to UL 1950/IEC 950):

0.75mA max, 0.50mA typ

POWER FACTOR:

100V a-c: 0.99 typ.
240V a-c: 0.93 typ.

OUTPUT CHARACTERISTICS:

SOURCE EFFECT: (85 to 265 Va-c)

0.4% max.

LOAD EFFECT: measured at sensing terminals

(0% - 100% load change)

0.8% max.

TEMPERATURE EFFECT: (-10 to 50°C)

1.0% max.

COMBINED EFFECT:

2.0% max. (4% typical for overshoot at start-up)

TIME EFFECT OR DRIFT: (1/2 to 8 hr. at 25°C)

0.4% max.

TRANSIENT RECOVERY: A step load change from
50% to 100% of rated load in 50 microseconds or more
produces no more than 4% output voltage excursion.
Temperature range from -10 to 50°C. Recovery time is
1mS maximum.

HOLD UP TIME: Condition: 100% output load. Upon
input interruption the output is maintained for:

100 Va-c: 20mS typ.
240 Va-c: 20mS typ.

START UP TIME:

100 Va-c, 240 Va-c: 500ms max., 400ms typ.

OVERVOLTAGE PROTECTION: Fixed, factory set.
See Table 1. The overvoltage circuit is set by Zener diode
clamp, latching will occur.

OVERCURRENT: Square type, output voltage returns
to rated level upon removal of cause of malfunction (long
term overcurrent could damage unit).

ENVIRONMENTAL CHARACTERISTICS

OPERATING TEMPERATURE: -10 to 60°C (start up

-20 to -10°C). See the derating, Figure 1.

STORAGE TEMPERATURE: -30°C to + 75°C.

COOLING: Natural convection. Do not allow the power

supply to become dust covered because that will
decrease the cooling efficiency of the unit and cause insu­lation to deteriorate.

HUMIDITY: 10% to 90% relative humidity, operating
and storage, noncondensing, wet bulb temperature < or =
35°C.

VIBRATION: Three axes, one hour each, sweep time
10 min., nonoperating.

5-10 Hz., 10 mm amplitude
10-200 Hz., 2G (19.6m/s

SHOCK: Three axes, 60G (588m/s

2

) acceleration

2

), 11 mS ±5mSec
pulse duration, three shocks each axis, nonoperating, 1/2
sine pulse.

GENERAL CHARACTERISTICS

WITHSTANDING VOLTAGE: (at 5 to 35°C ambient,

45 to 85% relative humidity, cutout current 10 mA):

Between input and output terminals:

3.0 KV a-c for 1 minute (with Y-capacitor removed).

Between input terminals and ground:

2000V a-c for 1 minute.

Between output terminals and ground:

500V a-c for 1 minute.

INSULATION RESISTANCE: Between input and out­put, input and ground, output and ground: 100 megohms
minimum (500V d-c, 5 to 35°C ambient, 45 to 85% relative
humidity)

SAFETY: All units designed to meet UL 60950, CSA
C22.2,No. 60950-1(C-UL), and TÜV Rheinland EN60950
(ambient temp. 50°C). JBW 50W units are CE marked per
the Low Voltage Directive (LVD), EN60950.

EMC - EMISSIONS:

• Conducted Noise 0.15MHz to 30MHz: FCC
Class B, VCCI-B, EN55011-B, EN55022-B.

• Input Harmonics (on AC Mains) 0 to 2KHZ: EN
61000-3-2.

EMC - IMMUNITY:

• ESD: EN 61000-4-2 Level 4, Normal operation.

• Radiated Field Noise: EN 61000-4-3 Level 3,
Normal operation.

• Electrical Fast Transient/Burst (EFT): EN 61000­4-4 Level 3, Normal operation.

• Surge: EN 61000-4-5 Level 4, no damage.

• Conducted Noise: EN 61000-4-6 Level 3, Normal
operation.

• Power Frequency Magnetic Field: EN 61000-4-8
Level 4, Normal operation.

• Interruptions and voltage dips, short variations:
EN 61000-4-11, Normal operation.

WARRANTY: One year.

ORIENTATION: Vertical or horizontal (see Figure 2).

KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A.  TEL [phone]  FAX [phone]

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

2 228-1511 REV 1 061510