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DC Switching Power Supply


DC Switching Power Supply

Product No: 71

Key Features: 
AC input range selected by switch
Protections: Short circuit / Overload / Over voltage
Forced air cooling by built-in DC fan
100% full load burn-in test
Fixed switching frequency at 60KHz
Low cost
High reliability

Input Voltage85-264 VAC (170-370 VDC)
Input Frequency47-63 Hz
Input Current2.75 A/1.40 A max at 115 VAC/ 230 VAC (JPS250) 4.5 A/2.2 A max at 115 VAC/230 VAC (JPS350)
Inrush Current30 A at 115 VAC, 60 A at 230 VAC
Power Factor0.9 typical
Earth Leakage Current3.0 mA max 264 VAC/60 Hz
Input ProtectionInternal T5 A, 250 VAC fuse (JPS250) Internal T6.3 A, 250 VAC fuse (JPS350)
Output VoltageSee table on datasheet
Output Voltage Trim±10% on output 1 only (VR1)
Initial Set AccuracyAt 60% rated load ±1% on V1 & V2, ±5% on V3 & V4
Minimum LoadSingle output models: No minimum load required. Multi-output models, see note 4 on datasheet
Start Up Delay2 s typical
Start Up Rise Time80 ms typical (JPS250) 100 ms typical (JPS350)
Hold Up Time20 ms min at low line & rated load
Line Regulation±0.5% at rated load across input voltage range
Load Regulation±1% for single output models & V1 & V2 of multi-output models, ±5% for V3 & V4
Transient Response4% max deviation, recovery to within 1% in 500 µs for a 25% load change
Ripple & Noise±1% max pk-pk, 15 MHz bandwidth, see note 2 under model tables on datasheet
Overvoltage Protection115-140% on single outputs & V1 of quad output models, recycle input to reset
Overload Protection110-130% of max rated load on all O/Ps, auto recovery
Short Circuit ProtectionTrip and restart (Hiccup mode), auto recovery
Temp. Coefficient±0.05%/°C
Remote SenseCompensates for up to 0.5 V drop
Current ShareCurrent share on single output models & V1 & V2 of multi-output models (4 supplies can be paralleled)
Fan OutputSee mechanical notes for ordering information
EfficiencyUp to 88%
Isolation3000 VAC Input to Output 1500 VAC Input to Ground 500 VAC Output to Ground
Switching Frequency120 kHz typical for PFC and PWM
Power Density4.96 W/In3
SignalsAC OK, DC OK, Remote On/Off (see control and supervisory signals)
MTBF125 kHrs to MIL-HDBK-217F at +50 °C, GB (JPS250), 146 kHrs to MIL-HDBK-217F at +50 °C, GB (JPS350)
Operating Temperature0 °C to +70 °C, (see derating curve) Full power to +50 °C
Cooling250 W with 18 CFM airflow (JPS250) 200 W convection cooling (JPS250) 350 W with 18 CFM airflow (JPS350) 300 W convection cooling (JPS350)
Operating Humidity5-95% RH, non-condensing
Storage Temperature-20 °C to +85 °C
Operating Altitude2000 m
Vibration2 g, 10 Hz to 55 Hz, 30 mins each axis
EMC and Safety
EmissionsEN55022, level B conducted FCC 20780, level B conducted
Harmonic CurrentsEN61000-3-2
ESD ImmunityEN61000-4-2, level 3 Perf Criteria A
Radiated ImmunityEN61000-4-3, 10 V/m Perf Criteria A
EFT/BurstEN61000-4-4, level 3 Perf Criteria A
SurgeEN61000-4-5, level 3 Perf Criteria A
Dips and InterruptionsEN61000-4-11, 30% 10 ms, 60% 100 ms, 100% 5000 ms, Perf Criteria A, B, B
Safety ApprovalsEN60950-1, UL60950-1, CSA C22.2 No. 60950-1, CE Mark LVD



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