DCDC
Specification
20 Watts
• 72 & 110 VDC Input for Railway Applications
• Single and Dual Outputs
• 1500 VAC Basic Isolation
• High Power Density
• High Efficiency Up to 88%
• Remote On/Off
• 3 Year Warranty
RDC Series
Input
Input Voltage Range • 72 V (36-140 VDC), 110 V (55-176 VDC)
Input Current • See table
Input Reflected Ripple • 20 mA pk-pk through 12 µH inductor
Input Filter • Pi network
Undervoltage Lockout • 72 V models: ON 33.5 V, OFF 30.5 V typ.
110 V models: ON 52.5 V, OFF 48.5 V typ.
Input Surge • 72 V models 150 VDC for 100 ms
110 V models 185 VDC for 100 ms
Output
Output Voltage • See table
Output Voltage Trim • ±10% on single outputs models only
Minimum Load • No minimum load required
Line Regulation • ±0.2% max
Load Regulation • Single output models: ±0.5% max,
Dual output models: ±1% max balanced
outputs
Cross Regulation • ±5% (see note 2)
Setpoint Accuracy • ±1%
Start Up Time • 30 ms typical
Ripple & Noise • 100 mV or 1% pk-pk for single output
models, 150 mV or 1% pk-pk for dual
output model, whichever is greater,
20 MHz bandwidth (see note 3)
Transient Response • 4% max deviation, recovery to within
1% in <500 µs for a 25% load change
Temp. Coefficient • 0.02%/°C
Overvoltage Protection • 3.3 V models: 3.9 V typical, 5 V models:
6.2 V typical, 12 V models: 15 V typical
15 V models: 18 V typical, ±5 V models:
±6.2 V typical, ±12 V models: ±15 V typical
±15 V models: ±18 V typical
Overload Protection • >150% of full load
Short Circuit Protection • Trip & restart (hiccup mode), auto recovery
Overtemperature • 115 °C typical
Protection
Remote On/Off • On = Logic High (>3.0) or Open
Off = Logic Low (<1.2 V) or short pin 2 to 3
Maximum Capacitive • See table
Load
xppower.com
General
Efficiency • See table
Isolation Voltage • 1500 VAC Input to Output
1600 VDC Input to Case
1600 VDC Output to Case
Isolation Capacitance • 2000 pF
Switching Frequency • 270 kHz typical
Power Density • 25 W/in
3
MTBF • 400 kHrs min to MIL-HDBK-217F at 25 °C,
GB
Environmental
Operating Temperature • -40 °C to +85 °C (see derating curve)
Case Temperature • +105 °C max
Cooling • Convection-cooled
Operating Humidity • 5-95% RH, non-condensing
Storage Temperature • -40 °C to +125 °C
EMC
General • Complies with EN50121-3-2, Railway
Applications - Electromagnetic
Compatibility for Rolling Stock Apparatus
Emissions • EN55011, 79 dBµV (0.15-0.5 MHz)
73 dBµV (0.5-30 MHz)
ESD Immunity • EN61000-4-2, level 3, Perf Criteria A
Radiated Immunity • EN61000-4-3 20 V/m Perf Criteria A*
EFT/Burst • EN61000-4-4 level 3, Perf Criteria A*
Surge • EN61000-4-5 level 2, Perf Criteria A
Conducted Immunity • EN61000-4-6 10 V/rms, Perf Criteria A
Magnetic Field • EN61000-4-8 10 A/m, Perf Criteria A
*External input capacitor required 220 µF/250 V
