KEPCO RTW 100W User Manual

INSTRUCTION MANUAL

KEPCO

An ISO 9001 Company.

RTW

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 RTW 100W Series of Open Frame PFC

(Power Factor Corrected) RoHS (Reduction of Hazardous Substances) compliant Switching Power Supplies.

DESCRIPTION. The Kepco RTW 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 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 47-440Hz; units operate up to 440Hz although leakage current, power factor and efficiency specifications may not be met)). They will
also operate on 120V to 370V d-c input. The RTW 100W Series employs a forward converter with a fixed switching frequency of 160KHz.
Power Factor Correction (PFC) is provided by a boost converter. Regulation is provided by pulse width modulation. A thermistor circuit pre­vents excessive turn-on current surge. Remote on-off and remote programming of output voltage using an external resistance can be imple­mented. Overvoltage and overcurrent protection is provided. Current limiting with automatic recovery from short circuit is featured. Units are
convection cooled L-chassis construction. Models with a factory-installed steel cover are indicated by a C suffix following the model number
(e.g., RTW 5-20KC).

Section II contains specifications and operating limits of individual RTW 100W Series models (Table 1) as well as specifications and operating
limits common to all RTW 100W Series Models. Section III describes installation and Section IV describes operation

II — SPECIFICATIONS

The following specifications are at rated input voltages at 25°C unless otherwise specified.

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

MODEL

OUTPUT VOLTAGE SETTING, d-c

ADJUSTMENT RANGE, Vd-c

OUTPUT CURRENT, MAX (AMPS)

OUTPUT POWER, MAX

OVP SETTING

OVERCURRENT SETTING

(AMPERES)

EFFICIENCY

RIPPLE

AND

(4)

NOISE

(mV p-p)

External Potentiometer

(1) An overvoltage shuts down the output. Recover by recycling a-c input (30 second delay required before resetting).
(2) Hiccup mode operation. After the cause of overcurrent is removed, output voltage recovers automatically.
(3) See Figure 1 for temperature and input voltage rating.
(4) Bandwidth 100MHz. 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 40 ~ 71°C.

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

(3)

(WATTS)

(1)

(VOLTS)

(2)

100 Va-c

240 Va-c

Switching ripple (typ)

spike noise (typ)

(5)

INPUT VOLTAGE:

Nominal 100-120V a-c, 220-240V a-c, range: 85-265V a-c (0 to 100% load, -10 to 71°C).
d-c range: 120 -370V d-c; polarity insensitive. Safety agency approval applies only to a-c input operation.

INPUT SOURCE FREQUENCY: Nominal 50/60 Hz; Range 47-440 Hz (0 to 100% load, -10 to 71°C). (Units operate up to 440 Hz, however

the leakage current exceeds the UL leakage safety specification limit, and power factor and efficiency specifications may not be met.)

INPUT CURRENT:

5V-48V models: 1.5A rms max. (100-120 Va-c input, 100% load); 0.75A rms max. (200-240 Va-c input, 100% load).

3.3V model: 1.1A rms max. (100-120 Va-c input, 100% load); 0.55A rms max. (200-240 Va-c input, 100% load).

INPUT PROTECTION AND SOFT START: A thermistor circuit reduces start-up surge. Units are protected against shorts by an input

fuse. Fuse value 3.15A, 250V (N-Siesen P/N: SST250V3.15A(TA)-TR, Kepco P/N: 541-0042).

INPUT SURGE: cold start 25 °C (First surge only, not including the current flow into the EMI filter)

14A typ. (100 V a-c, 100% load); 28A typ. (200 Va-c, 100% load).

LEAKAGE CURRENT:

0.13mA typ, 0.19mA max at 120V a-c and 60 Hz (operating in conformance with Den-An),

0.30mA typ, 0.45mA max at 240V d-c and 60 Hz (operating in conformance with IEC 950 and UL1950).

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

©2011, KEPCO, INC 1
Data subject to change without notice 228-1504 REV 11

RTW 3.3-25K RTW 5-20K RTW 12-8.4K RTW 15-6.7K RTW 24-4.2K RTW 28-3.6K RTW 48-2.1K

3.3 ±0.03V 5 ±0.05V 12 ±0.12V 15 ±0.15V 24 ±0.24V 28 ±0.28V 48 ±0.48V

2.60-4.0 4.0-5.8 9.6-13.2 12-16.5 19.2-26.4 22.4-30.8 38.4-52.8
25 20 8.4 6.7 4.2 3.6 2.1

82.5 100 100.8 100.5 100.8 100.8 100.8

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

26.2 - 33.7 21.0 - 25.0 8.82 - 10.5 7.03 - 9.04 4.68 - 5.25 3.78 - 4.86 2.2 - 2.62

79% 83% 84% 85% 85% 85% 85%
81% 85% 86% 87% 87% 87% 88%

80 80 100 100 150 150 200

(4)

120 120 150 150 200 200 300

250 Ohms 250 Ohms 500 Ohms 500 Ohms 1K Ohms 1K Ohms 2K Ohms

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100W

POWER FACTOR: 0.99 typ. at 100 Va-c, 0.92 typ. at 200 Va-c.

STABILIZATION:

Source Effect: (85 to 132Va-c, 170-265 Va-c) 0.1% typ., 0.2% max. (3.3V model:

5mV typ., 10mV max.)

Load Effect: (0% - 100% of rated output current) 0.2% typ., 0.4% max. (3.3V

model: 10mV typ., 20mV max.)

Temperature effect: (-10 to 71°C) 0.5% typ., 1.0% max.
Combined effect (source, load, temperature): 0.9% typ., 1.8% max.
Time effect (drift): (1/2 to 8 hr. at 25°C) 0.2% typ., 0.5% max.

TRANSIENT RECOVERY: A step load change from 50% to 100% of rated output

current in 50 microseconds or more, produces no more than 4% output voltage excur­sion (3.3V model: 200mV max.). Recovery time is 1ms maximum.

ACCEPTABLE LOAD CAPACITANCE: 10,000µF max (start-up time is affected)

OUTPUT HOLDING TIME: Upon input interruption the output is maintained for 35

milliseconds typical (20 ms min.).

START UP TIME: 400ms typ., 500ms max. at 100 Va-c; 200ms typ., 300ms max.,

at 240 Va-c. Between 0 and -20° C output may take 3 seconds to stabilize.

OVERVOLTAGE PROTECTION: Fixed, factory set. See Table 1. The overvoltage

circuit is set by Zener diode clamp, latching will occur.

OVERCURRENT: Hiccup type, output voltage returns to rated level upon removal

of cause of malfunction.

FIGURE 1. OUTPUT POWER VS.

TEMPERATURE,

K MODELS (WITHOUT COVER)

OPERATING TEMPERATURE: -10 to 71°C (start up -20 to -10°C). See the derat-

ing, Figure 1 or 2. 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.

STORAGE TEMPERATURE: -30°C to + 75°C.

COOLING: Natural convection.

ORIENTATION: Vertical or horizontal (see Figure 5).

HUMIDITY: Operating: 10% to 95% relative humidity, storage:10% to 95% relative

humidity; noncondensing, wet bulb temperature < or = 35°C.

WITHSTANDING VOLTAGE

(at 15 to 35°C ambient, 10 to 85% relative humidity):
Between input and output terminals, 3.0 KV a-c for 1 minute, cutout current 10 ma.
Between input terminals and ground, 2.0 KV a-c for 1 minute, cutout current 10 ma.
Between output terminals and ground, 500V a-c for 1 minute, cutout current 20 ma.

INSULATION RESISTANCE: Between input and output, input and ground, output

and ground, ±RC terminals and output, ±RC terminals and input: 100 megohms
minimum (500V d-c, 15 to 35°C ambient, 10 to 85% relative humidity).

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, 20G (196m/S

(588m/S2) when installed per Figure 5, method B or C, 11ms ±5 msec pulse dura­tion, three shocks each axis, nonoperating, 1/2 sine pulse.

EMC - EMISSIONS:

Radiated Noise 30MHZ to 1GHz: FCC Class B, VCCI-B, EN55011-B, EN55022-B
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.

2

).

2

) when installed per Figure 5, method A, 60G

FIGURE 2. OUTPUT POWER VS.

TEMPERATURE

KC MODELS (WITH COVER)

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 61000-4-4 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.
Voltage Dips, Short Interruptions, Voltage Variation: EN 61000-4-11, Normal

operation.

FIGURE 3. COMPONENT LOCATIONS

SAFETY: All units designed to meet EN 60950:2001 Assistance for DEN-AN. U.S. UL 60950 First Edition.; Canada: CSA-22.2 No. 60950-1.

(ambient temp. 50°C). RTW 100W units are CE marked per the Low Voltage Directive (LVD), EN60950 73/23/EEC AND 93/68/EEC. [The
standards do not apply with DC input operation.]

WEIGHT: 13.4 oz. (380 grams) max

WARRANTY: One year.

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

2 228-1504 REV 11 032111

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