Designed for railway applications, our 20 watt single and dual output DC-DC converter meets UL60950-1, EN60950-1, IEC60950-1 and EN50155 standards and has an output current up to 2.4 A. This model also features a standard 1.00" x 2.00" x 0.40" package and its CE mark meets 2006/95/EC, 93/68/EEC and 2004/108EC.

INPUT

• Voltage Range
• 24 Vdc nominal input: 18 - 36 Vdc
• 48 Vdc nominal input: 36 - 75 Vdc
• 110 Vdc nominal input: 43 - 160 Vdc
• Input Filter: Pi Filter
• Input Surge Voltage
• 24 Vdc input: 50 Vdc 1 sec, max.
• 48 Vdc input: 100 Vdc 1 sec, max.
• 110 Vdc input: 170 Vdc 1 sec., max.
• Input Reflected Ripple Current Normal input and full load: 30 mAp-p
• Startup Time
• Normal input and constant resistive load
• Power up: 30 ms, max.
• Remote On/On 30 ms, max.
• Startup Voltage
• 24 Vdc input: 9 Vdc, max.
• 48 Vdc input: 18 Vdc, max.
• 110 Vdc input: 43 Vdc, max.
• Shutdown Voltage
• 24 Vdc input: 8 Vdc
• 48 Vdc input: 16 Vdc
• 110 Vdc input: 40 Vdc
• Remote ON/OFF
  
• Positive Logic (Option)
• DC-DC ON: Open or 3V < Vr < 15V
• DC-DC OFF: Short or 0V < Vr < 1.2V
• Negative Logic (Standard)
• DC-DC ON: Short or 0V < Vr < 1.2V
• DC-DC OFF: Open or 3V < Vr < 15V
• Input Current of Remote Control Pin
• Nominal input: -0.5 mA - 1.0 mA
• Remote off state input current
• Nominal input: 2.5 mA

OUTPUT

• Output Power: 20 Watts
• Voltage Accuracy: ±1%
• Minimum Load: 0%
• Voltage Adjustability
• Single: ±10%
• Line Regulation:
• LL to HL at Full Load
• Single: ±0.2%
• Dual: ±0.5%
• Load Regulation
• No Load to Full Load
• Single: ±0.2%
• Dual: ±1.0%
• 10% Load to 90% Load
• Single: ±0.1%
• Dual: ±0.8%
• Cross Regulation Asymmetrical Load 25%/100% FL
• Dual: ±5%
• Ripple and Noise 20MHz band width: 75 - 100 mVp-p
• Measured with a 1u50F/50V X7R MLCC
• Temperature Coefficient: ±0.2%/°C, max.
• Transient Response recovery time
• 25% load step change: 250μS
• Over voltage protection
• 3.3 Vdc output: 3.7 Vdc - 5.4 Vdc
• 5 Vdc output: 5.6 Vdc - 7.0 Vdc
• 12 Vdc output: 13.5 Vdc - 19.6 Vdc
• 15 Vdc output: 16.8 Vdc - 20.5 Vdc
• Overload Protection
• Percent of FL at nominal input: 150%
• Short Circuit Protection: Hiccup, automatic recovery

GENERAL

• Efficiency: 85 - 89%
• Isolation Voltage
• Input to Output: 1600 Vdc, min. 1 minute
• Input (Output) to Case: 1000 Vdc, min. 1 minute
• Isolation Resistance: 10⁹ ohms, min.
• Isolation Capacitance: 3000 pF, max.
• Switching Frequency: 330 KHz, ±10%
• Approvals and Standards: IEC60950-1, UL60950-1, EN60950-1, EN50155
• Case Material: Nickel coated copper
• Base material: FR4 PCB
• Potting Material: Silicon (UL94-V0)
• Dimensions: 1.00 x 2.00 x 0.40 inches (25.4 x 50.8 x 10.2 mm)
• Weight: 30 g (1.06 oz.)

MTBF

• BELLCORE TR-NWT-000332: 1.630 x 10⁶ hrs
• MIL-HDBK-217F: 4.950 x 10⁵ hrs

ENVIRONMENTAL

• Operating Ambient Temperature: -40 to 101°C with derating
• Maximum Case Temperature: 105°C
• Storage Temperature Range: -55 to 125°C
• Thermal Impedance
• Natural Convection: 12°C
• Natural Convection with Heat Sink: 10°C
• Thermal Shock: EN61373, MIL-STD-810F
• Vibration: EN61373, MIL-STD-810F
• Relative Humidity: 5 - 95% RH

EMC CHARACTERISTICS

• EMI: EN55022, EN55011
• 24 Vdc, 48 Vdc: Class B
• 110 Vdc: Class A
• ESD, EN61000-4-2, Perf. Criteria A
• Air: ±8KV
• Contact: ±6KV
• Radiated Immunity: EN61000-4-3, 20 V/m, Perf. Criteria A
• Fast Transient: EN61000-4-4, ±2KV, Perf. Criteria A
• Surge: EN61000-4-5, ±2KV, Perf. Criteria A
• Conducted Immunity: EN61000-4-6, 10 Vrms, Perf. Criteria A