OUTPUT SPECIFICATIONS

Nominal voltage

75VAC

Voltage accuracy

No load

±3.0V

Load regulation

NL to FL resistive

±2.0%

Line regulation

Low line to high line

±2.0%

Load impedance

Resistive load (See Note 1)

Capacitive load (See Note 1)

82 bells

Output frequency

25Hz ±2Hz

Maximum output current

2.2A

Output ripple and noise Switching to 20MHz

5V pk-pk

Output ripple frequency Full load

180kHz, nominal

Total harmonic

Resistive load

5.0% max.

distortion

Output current

1.0A

DC offset

±2V max.

INPUT SPECIFICATIONS

Input voltage range

48VDC nominal

36 to 60VDC

Input current

3A max. @ 36VDC

Input filter

Pi network

Input undervoltage

48VDC input model

34VDC max.

(output clipped)

Reference input

Internal sine-wave

impedance

reference oscillator

Remote ON/OFF
Logic compatibility

(See Note 4)

Opto-isolated
control inputs

Response time

<100ms and start

from positive going

zero crossing

SWG75 SERIES

DC/AC single output ring generator

[ 2 YEAR WARRANTY ]

· Provides 75VA of ringer output power
· Typical efficiency 78%
· Short circuit protection
· Operating temperature up to 70°C
· Internal sine wave reference
· Remote ON/OFF control
· Opto-isolated cadencing ON/OFF control
· Peak output DC biased current capability
· Stand-offs for optional heatsink mounting

The SWG75 ring current generator series of DC/AC inverters offer 75VA of
output power with industry standard footprints and configurations. The design
is specifically tailored for PABX system applications to ensure ease of
implementation in customer applications. These special features include
cadencing output ON/OFF, peak output DC biased current capability at off-hook
transition.

SPECIFICATION

All specifications are typical at nominal input, full load at 25°C unless otherwise stated

PAGE 176

GENERAL SPECIFICATIONS

Efficiency

Resistive load

75% typ.

Isolation voltage

Input/output

500VDC

Input/remote control

500VDC

Isolation resistance

Input/output

Switching frequency

Fixed

90kHz, typical

Case material

Aluminium with plastic

non-conductive base

Material flammability

UL94V-0

Weight

(Including heatsink)

450g (15.8oz)

MTBF

MIL-HDBK-217F

100,000 hours

@ 25°C nominal
input voltage

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating temperature

See curve

(ambient)
Non-operating

40°C to +85°C

Relative humidity

Non-condensing

10% to 95% RH

Altitude

Operating

10,000 feet max.

Non-operating

30,000 feet max.

Vibration

5Hz to 500Hz

2.4G rms (approx.)

Notes

1 bell = 3k

in series 1.2µF, 82 bells = 36

in series 98µF.

Peak output DC current is the DC biased current flowing through the
output. Maximum duration is 1 second.

Metal case (pin 7) should either be tied to +INPUT (pin 4) or -INPUT (pin 3)
directly or through a capacitor (>10nF).

Remote pins are inputs of an opto-isolator, with an internal 330

1/4W

resistor in series.

SWG75-48S75C01/P has the same input and output specifications except
the remote control logic is reversed.

ALL DIMENSIONS IN INCHES (mm)

0.375

(9.525)

5.500

(139.700)

BOTTOM

VIEW

4.300

(109.220)

3.500

(88.900)

1.280

(32.512)

0.030

(0.762)

0.220

(5.613)

0.890

(22.606)

0.625

(15.875)

3.000

(76.200)

PIN DIA. TYP.
0.040 (1.016)

Pin 13

Pin 14

330R 1/4W

T on = 1 cycle max.
T off = 1 cycle max.

Off

Internal
sine
wave
reference

Output

Remote
Control

T on

T off

INPUT

OUTPUT

PEAK OUTPUT

TYPICAL

MODEL NUMBER

(5)

VOLTAGE

FREQUENCY

CURRENT (RMS)

DC CURRENT

(2)

EFFICIENCY

48VDC

75VAC

25Hz

480mA

78%

SWG75-48S75C01

PROTECTION

Short circuit protection

Indefinite

Short circuit input current

48VDC, 80mA max.

Overvoltage protection

None

Overcurrent protection

2.2A peak bouncing mode

Undervoltage protection

None

75VA

DC/AC ring generator

TELEPHONE RING GENERATORS

75VA DC/AC

PAGE 177

http://www.artesyn.com

MODEL

OUTPUT

SWG75-48S75C01

0mA

10 to 20mA

OFF

SWG75-48S75C01/P

(5)

0mA

OFF

10 to 20mA

PIN CONNECTIONS

PIN NUMBER

PIN NAME

FUNCTION

No Pin

-----

No Connection

- Input

Negative Input

+ Input

Positive Input

No Connection

(3)

Metal Case

No Connection

Return

Output Common

75V

Output

No Connection

- Remote

Remote Return

+ Remote

Remote Input

Vin

1 +

(1 + R

)

fCR

(

)

fuse

+48Vin

Vout

Return

Resistive / capacitive loading power factor

(See derating curve)

Power Factor =

1 +

(

)

Power factor =

fCR

Vin

Fuse

-48Vin

Vout

Return

Capacitive loading power factor

(See derating curve)

(See Note 2 for DC biased current condition)

Vin

Fuse

+48Vin

Vout

Return

Capacitive loading power factor

(See derating curve)

(See Note 2 for DC biased current condition)

+48V

-48Vin

Automatic recovery time <2 cycle maximum

Short circuit occurs here

Short circuit removed

Internal sine
wave
reference

Output

PAGE 178

75VA
DC/AC ring generator

75VA DC/AC |

TELEPHONE RING GENERATORS

Application notes

Automatic zero crossing recover after short circuit removed.

Examples of DC biased operation.

2.1 Non-biased operation

2.2 Negative DC Biased operation.

2.3 Positive DC biased operation.

System board

Heatsink

Air flow

direction

Application notes continued

For optimal thermal performance conforming to derating curve, the
module should be installed vertically.

Thermal derating curves

(nominal input condition)

75W
70W

60W

50W

40W

30W

20W

10W

C 10

C 20

C 30

C 40

C 50

C 60

C 70

C 80

C 90

C 10

C 20

C 30

C 40

C 50

C 60

C 70

C 80

C 90

C 10

C 20

C 30

C 40

C 50

C 60

C 70

C 80

C 90

C 10

C 20

C 30

C 40

C 50

C 60

C 70

C 80

C 90

C 10

C 20

C 30

C 40

C 50

C 60

C 70

C 80

C 90

C 10

C 20

C 30

C 40

C 50

C 60

C 70

C 80

C 90

RESISTIVE LOADING

(power factor = 1.0)

FAN COOLING WITH

BUILT-IN HEATSINK

AMBIENT TEMPERATURE (

75W
70W

60W

50W

40W

30W

20W

10W

RESISTIVE LOADING

(power factor = 1.0)

FREE AIR

CONVECTION

AMBIENT TEMPERATURE (

75VA
70VA

60VA

50VA

40VA

30VA

20VA

10VA

0VA

CAPACITIVE LOADING

(power factor = 0.8)

AMBIENT TEMPERATURE (

75VA
70VA

60VA

50VA

40VA

30VA

20VA

10VA

0VA

CAPACITIVE LOADING

(power factor = 0.5)

AMBIENT TEMPERATURE (

75VA
70VA

60VA

50VA

40VA

30VA

20VA

10VA

0VA

CAPACITIVE LOADING

(power factor = 0.8)

FREE AIR

CONVECTION

AMBIENT TEMPERATURE (

75VA
70VA

60VA

50VA

40VA

30VA

20VA

10VA

0VA

CAPACITIVE LOADING

(power factor = 0.5)

AMBIENT TEMPERATURE (

FREE AIR

CONVECTION

FAN COOLING WITH

BUILT-IN HEATSINK

FAN COOLING WITH

BUILT-IN HEATSINK

Fan cooling with built-in heatsink:

a =

Free air convection

b =

75 LFPM

c =

225 LFPM

d =

500 LFPM

Free air convection

a =

Built-in heatsink

b =

Heatsink of 1°C/W

c =

Heatsink of 0.5°C/W

d =

No heatsink

75VA

DC/AC ring generator

TELEPHONE RING GENERATORS

75VA DC/AC

PAGE 179

http://www.artesyn.com

Data Sheet © Artesyn Technologies® 2000
The information and specifications contained in this data sheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising
from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.

DS_SWG75_20000101.PDF

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