With an industry standard 24 PIN DIP package, our 8 watt single and dual output DC-DC converter for railway applications features an optional SMD package, output currents up to 2.4A and 88% efficiency. This model also meets railway safety standards including UL60950-1, EN60950-1, IEC60950-1 and EN50155.

INPUT

• Voltage Range
• 24 Vdc nominal input: 9 - 36 Vdc
• 48 Vdc nominal input: 18 - 75 Vdc
• 110 Vdc nominal input: 43 - 160 Vdc
• Input filter: Pi Filter
• Input Surge Voltage
• 24 Vdc input: 50 Vdc 100 ms, max.
• 48 Vdc input: 100 Vdc 100 ms, max.
• 110 Vdc input: 170 Vdc 100 ms, max.
• Input Reflected Ripple Current: 20 mAp-p
• Start up Time, Normal input and constant resistive load, Power up: 450 ms
• 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: 42 Vdc
• Remote ON/OFF (Note 5)
• DC-DC ON: Open or 3V < Vr < 12V
• DC-DC OFF: Short or 0V < Vr < 1.2V
• Input Current of Remote Control Pin, Nominal input: -0.5 mA - 0.5 mA
• Remote off state input current, Nominal input: 2.5 mA

OUTPUT

• Output Power: 8 Watts max.
• Voltage Accuracy: ±1%
• Minimum Load: 0%
• Line Regulation
• LL to HL at Full Load: ±0.2%
• No Load to Full Load
• Single (DIP): ±0.5%
• Single (SMD): ±1.0%
• Dual (SMD, DIP): ±1.0%
• Load Regulation
• 10% Load to 90% Load
• Single (DIP): ±0.3%
• Single (SMD): ±0.8%
• Dual (SMD, DIP): ±0.8%
• Cross Regulation Asymmetrical Load 25%/100% FL: ±5%
• Ripple and Noise (20 MHz band width): 50 - 75 mVp-p
• Temperature Coefficient: ±0.2%/°C, max.
• Transient Response recovery time, 25% load step change: 250μS
• Over voltage protection
• 3.3 Vdc output: 3.9 Vdc
• 5 Vdc output: 6.2 Vdc
• 12 Vdc output: 15 Vdc
• 15 Vdc output: 18 Vdc
• Overload Protection, percent of FL at nominal input: 150%
• Short Circuit Protection: Continuous, automatic recovery

GENERAL

• Efficiency: 82 - 87%
• Isolation Voltage
• Input to Output: 1600 Vdc, min. 1 minute
• Input (Output) to Case,
• DIP: 1600 Vdc, min. 1 minute
• SMD: 1000 Vdc, min. 1 minute
• Isolation Resistance
• 500 Vdc: 10⁹ ohms, min.
• Isolation Capacitance: 1500 pF, max.
• Switching Frequency: 300 kHz ±10%
• Approvals and Standard: IEC60950-1, UL60950-1, EN60950-1, EN50155
• Case Material: Nickel Coated Copper
• Base Material: Non-conductive black plastic
• Potting Material: Epoxy (UL94-V0)
• Dimensions: 1.25 x 0.80 x 0.40 inches (31.8 x 20.3 x 10.2 mm)
• Weight: 18 g (0.62 oz.)
• MTBF (Note 1)
• BELLCORE TR-NWT-000332: 2.350 x 10⁶ hrs
• MIL-HDBK 217F: 1.078 x 10⁶ hrs

ENVIRONMENTAL

• Operating Ambient Temperature
• Vo:5V, 12V, 15V:
• -40 to 78°C without derating
• ±12V, ±15V:
• 78 to 105°C with derating
• -40 to 70°C without derating
• Vo:3.3V, ±5V
• 70 to 105°C with derating
• Maximum Case Temperature: 105°C
• Storage Temperature Range: -55 to 125°C
• Thermal Impedance (Note 8), Natural Convection: 20°C/Watt
• Thermal Shock: EN61373, MIL-STD-810F
• Vibration: EN61373, MIL-STD-810F
• Relative Humidity: 5 - 95% RH

EMC CHARACTERISTICS

• EMI: EN55022, EN55011, Class A, Class B
• 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