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)

75

Ω

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.

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GENERAL SPECIFICATIONS

Efficiency

Resistive load

75% typ.

Isolation voltage

Input/output

500VDC

Input/remote control

500VDC

Isolation resistance

Input/output

1G

Ω

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.)