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Polytron LWB40 Series DC-DC Converters, 40 Watt 4:1 Ultra Wide Input Range


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Six-sided continuous metal shielding ideal for railway applications

Good for railway applications, our 40 watt wide input range LWB40 series DC-DC converter features a low profile package, an operating temperature from -40 to 85°C and a minimum input/output isolation of 1600 Vdc. This series meets EN50155, EN50121-3 and EN61373 railway requirements and UL60950-1, EN60950-1, IEC60950-1 and EN50155 safety standards. 

  • 4:1 Wide Input Range
  • Railway Applications: Meets EN50155, EN50121-3 and EN61373
  • Safety Meets CE, UL60950-1, EN60950-1, IEC 60950-1, EN50155
  • Operating Temperature: -40 to +85ºC
  • Low Profile Package (1.00" × 2.00" × 0.40”)
  • Input/Output Isolation: 1600Vdc Min.
  • High Efficiency to 92% @ FL
  • Six-Sided Continuous Metal Shielding
  • Compliant to RoHS & Reach

LWB40 Series Specification Sheet PDF

Model Number Input Voltage
Range (Vdc)
Output Voltage
(Vdc)
Output Current 
Full Load (A)
Input Current
No load (mA)
Efficiency
(%)
Max. Capacitor 
Load µF
LWB40-24S33





9 - 36
3.3 10000 15 90 26600
LWB40-24S5 5 8000 15 91 20000
LWB40-24S12 12 3333 15 92 3900
LWB40-24S15 15 2666 15 92 2600
LWB40-24S24 24 1666 15 91 1300
LWB40-24-12 ±12 ±1666 15 90 ±2600
LWB40-24-15 ±15 ±1333 15 90 ±1600
LWB40-24-24 ±24 ±833 15 91 ±650
LWB40-48S33





18 - 75
3.3 10000 10 90 26600
LWB40-48S5 5 8000 10 91 20000
LWB40-48S12 12 3333 10 92 3900
LWB40-48S15 15 2666 10 92 2600
LWB40-48S24 24 1666 10 91 1300
LWB40-48-12 ±12 ±1666 10 90 ±2600
LWB40-48-15 ±15 ±1333 10 90 ±1600
LWB40-48-24 ±24 ±833 10 91 ±650
LWB40-110S33





43 - 160
3.3 10000 10 88 26600
LWB40-110S5 5 8000 10 89 20000
LWB40-110S12 12 3333 10 90.5 3900
LWB40-110S15 15 2666 10 91 2600
LWB40-110S24 24 1666 10 90 1300
LWB40-110-24 ±12 ±1666 10 89 ±2600
LWB40-110-15 ±15 ±1333 10 89 ±1600
LWB40-110-24 ±24 ±833 10 91 ±650




Input and Output Specifications:

INPUT

  • Operating input voltage range
    • 24 Vdc nominal input: 9 to 36 Vdc
    • 48 Vdc nominal input: 18 to 75 Vdc
    • 110 Vdc nominal input: 43 to 160 Vdc
  • Start up voltage
    • 24 Vdc nominal input: 9 Vdc
    • 48 Vdc nominal input: 18 Vdc
    • 110 Vdc nominal input: 43 Vdc
  • Shutdown voltage
    • 24 Vdc nominal input: 8 Vdc
    • 48 Vdc nominal input: 16 Vdc
    • 110 Vdc nominal input: 40 Vdc
  • Start up time
    • Constant resistive load, power up: 60 mS
    • Constant resistive load, remote on/off: 60 mS
  • Input surge voltage
    • 1 sec. max, 24 Vdc nominal input: 50 Vdc
    • 1 sec. max, 48 Vdc nominal input: 100 Vdc
    • 1 sec. max, 110 Vdc nominal input: 170 Vdc
  • Input filter: Pi type
  • Remote ON/OFF
    • Positive logic
      • DC-DC ON: Open or 3 to 12 Vdc
      • DC-DC OFF: Short or 0 to 1.2 Vdc
    • Negative logic
      • DC-DC ON: Short or 0 to 1.2 Vdc
      • DC-DC OFF: Open or 3 to 12 Vdc
  • Input current of control pin: -0.5 to 1 mA
  • Remote off input current: 3 mA

OUTPUT

  • Voltage accuracy: ±1%
  • Line regulation
    • Low line to high line at full load: ±0.2%
  • Load regulation
    • No load to full load, single: ±0.5%
    • No load to full load, dual: ±1%
  • Cross regulation
    • Asymmetrical load 25/100% FL, dual: ±5%
  • Voltage and adjustability
    • Single output, 3.3, 5 and 12 Vout: ±10%
    • Single output, 15 and 24 Vout: -10 to 20%
  • Ripple and noise (measured by 20 MHz)
    • 3.3 and 5 Vout: 75 to 100 mVp-p
    • 12 and 15 Vout: 100 to 125 mVp-p
    • 24 Vout: 150 to 200 mVp-p
  • Temperature coefficient: ±0.02%/°C
  • Transient Response recovery time
    • 25% load step change: 250µS
  • Over voltage protection
    • Zener diode clamp, 3.3 Vout: 3.9%
    • Zener diode clamp, 5 Vout: 6.2%
    • Zener diode clamp, 12 Vout: 15%
    • Zener diode clamp, 15 Vout: 20%
    • Zener diode clamp, 25 Vout: 30%
  • Over load protection: 150%
  • Short circuit protection: continuous, automatics recovery

More Specifications:

GENERAL

  • Efficiency: 88 to 92%
  • Isolation voltage
    • Input to output: 1600 Vdc
    • Input to case: 1600 Vdc
  • Isolation resistance: 500 Vdc
  • Isolation capacitance: 1500 pF
  • Switching frequency: 225 to 275 kHz

ENVIRONMENTAL

  • Operating ambient temperature: -40 to 85°C
  • Maximum case temperature: 105°C
  • Over temperature range: 115°C
  • Storage temperature range: -55 to 125°C
  • Thermal impedance (vertical direction by natural convection)
    • Without heat sink: 10.8°C/W
    • With heat sink: 10.3°C/W
  • Thermal shock: MIL-STD-810F
  • Shock: EN61373, MIL-STD-810F
  • Vibration: EN61373, MIL-STD-810F
  • Relative humidity: 5 to 95%

 

PHYSICAL

  • Design meets safety standards: UL60950-1, EN60950-1, IEC60950-1, EN50155
  • Case material: copper
  • Base material: FR4 PCB
  • Potting material: Silicone (UL94 V-0)
  • Weight: 32g (1.13 oz)
  • MTBF: 9.073 x 10^5 hours, MIL-HDBK-217F, full load

EMC CHARACTERISTICS

  • EMI: EN55011, EN55022 Class A
  • ESD: EN6100-4-2, Perf. Criteria A
    • Air: ±8 kV
    • Contact: ±6 kV
  • 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 Vr.m.s, Perf. Criteria A

 

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