[ 2 YEAR WARRANTY ]
SWG75 SERIES
DC/AC single output ring generator
• 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
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)
75Ω
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
distortion
Resistive load
5.0% max.
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
(output clipped)
48VDC input model
34VDC max.
Reference input
impedance
Internal sine-wave
reference oscillator
Remote ON/OFF
Logic compatibility
Response time
(See Note 4)
Opto-isolated
control inputs
<100ms and start
from positive going
zero crossing
GENERAL SPECIFICATIONS
Efficiency
Resistive load
75% typ.
Isolation voltage
Input/output
Input/remote control
500VDC
500VDC
Isolation resistance
Input/output
1GΩ
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
@ 25°C nominal
input voltage
100,000 hours
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
Non-operating
10,000 feet max.
30,000 feet max.
Vibration
5Hz to 500Hz
2.4G rms (approx.)
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