Temperature Coecient
0.03%/°C typical on all outputs.
Environmental
Designed for 0 to 50°C operation at full rated output power; derate output current
and total output power by 2.5% per °C above 50°C.
Medical EMI/EMC Compliance
All models include built-in EMI ltering to meet the following emissions require-
ments:
Ac Input
85-264 Vac, 47-63 Hz single phase.
Input Current
Maximum input current at 120 Vac, 60 Hz with full rated output load is 0.85 A.
Hold-up Time
15 ms minimum from loss of ac input at full load, nominal line (120 Vac).
Output Power
Normal continuous output power is 28 W, 32 W peak for 60 s maximum dura-
tion, 10% duty cycle. Factory set to begin power limiting at approximately 35
W.
Overload Protection
Fully protected against short circuit and output overload. Short circuit pro-
tection is cycling type power limit.
Output Noise
0.5% rms, 1% pk-pk, 20 MHz bandwidth, dierential mode. Measured with
scope probe directly across output terminals of the power supply with load
terminated with 0.1 μF capacitor.
Overvoltage Protection
Built in with ring point set per ratings table. OVP ring reduces voltage to
less than 50% of nominal voltage in 50 ms.
Voltage Adjustment
Factory set with xed resistors to maximize reliability.
Eciency
70% minimum for the 5.1 V model at full rated load, nominal input voltage.
Eciency increases as output voltage increases.
Input Protection
Internal ac fuse provided on all units. Designed to open only if a catastrophic
failure occurs in the unit.
Inrush Current
Inrush limited by internal thermistor. The inrush at 230 Vac, averaged over the
rst ac half-cycle under cold start conditions will not exceed 32 A.
Minimum Load Requirement 5% of full load rating
Transient Response 3.5% max. dev. 50% load step at 0.2 A/
μs. Recovery to
0.5% within 500 μs.
GSM28 Medical
28 Watt Global Performance Switchers
• Industry’s smallest 28 W medically approved switcher
• Compact size (4.00” x 2.59” x 0.92”)
• Wide-range ac input: 85-264 Vac
• Less than 25 μA leakage current @ 120 Vac
• Approved to UL2601-1, EN60601-1
• EMI to FCC, CISPR 11 Class B/IEC601-1-2
• Overvoltage protection standard
• RoHS Compliant Models Available (G sux)
GLOBAL PERFORMANCE SWITCHERS
All specications are typical at nominal input, full load at 25
O
C unless otherwise stated
FEATURES:
D C P o w e r S u p p l i e s
SPECIFICATIONS
• marked to LVD
EMI SPECIFICATIONS COMPLIANCE LEVEL
Conducted Emissions
Static Discharge
RF Field Susceptibility
Fast Transients/Bursts
Surge Susceptibility
Line Frequency Harmonics
EN55011 Class B; FCC Class B
EN61000-4-2, 6 kV contact, 8 kV air
EN61000-4-3, 3 V/meter
EN61000-4-4, 2 kV, 5 kHz
EN61000-4-5, 1 kV di., 2 kV com.
EN61000-3-2 Class A
Earth Leakage Current
Leakage current measured in the Gnd wire connection when measured per
EN60601-1 or UL2601-1 is as follows:
Medical Medical Safety
SL Power Electronics Corp. declares under our sole responsibility that all GSM
models are in conformity with the applicable requirements of UL2601-1 Patient
Care Equipment, CSA-C22.2 No. 234 (with additional tests to C22.2 No. 601.1 per
T.I.L. CA-08), EN60601-1.
Medical Normal SingleFault Test Test
Model Leakage Leakage Voltage Method
GSM28 25μA 45 μA 132 Vca/60 Hz UL2601-1
GSM28 50 μA 90 μA 264 Vca/50 Hz IEC60601-1
