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Polytron OFQC40 Series DC-DC Converters, Quarter Brick, Up To 40 Watts, 12:1 Ultra Wide Input Voltage Range


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Item Number: OFQC40

DC-DC Converters for Railway Applications

OFQC40 Series isolated 40W single output DC-DC converters are available in two ultra-wide 12:1 input ranges of 9-75V and 14-160V DC to handle a variety of railway power systems. Each range offers output voltages of 5, 12, 15, 24, 28, 48 or 53V DC. The units come in an industry-standard quarter-brick footprint, and they feature efficiencies as high as 91 percent, up to 3000V AC isolation voltage, remote ON/OFF and low standby power. OFQC40 DC-DC converters come with over temperature, overcurrent, overvoltage, undervoltage and short circuit protections. The series meets EN 50155 and 45545-2 standards for railway applications, complies to RoHS and REACH, and it carries the CE Mark.

OFQC40 Series Specification Sheet PDF

 

Daburn Part
Number
Input Voltage
Range (Vdc)
Output Voltage
(Vdc)
Output Current
Full Load
(A)
Input  Current
No Load
(mA)
Efficiency
%
Max. Capacitor
Load µF
OFQC40-36S5 9 - 75 5 8 20 89 16000μF
OFQC40-36S12 12 3.33 30 91 2800μF
OFQC40-36S15 15 2.67 30 91 1800μF
OFQC40-36S24 24 1.67 20 90 720μF
OFQC40-36S28 28 1.43 20 91 520μF
OFQC40-36S48 48 0.83 20 91 180μF
OFQC40-36S53 53 0.75 20 91 150μF
OFQC40-72S5 14 - 160 5 8 15 89 16000μF
OFQC40-72S12 12 3.33 20 91  2800μF
OFQC40-72S15 15 2.67 20 91  1800μF
OFQC40-72S24 24 1.67 15 90 720μF
OFQC40-72S28 28 1.43 15 91 520μF
OFQC40-72S48 48 0.83 15 90 180μF
OFQC40-72S53 53 0.73 15 91 150μF



Input and Output Specifications:


INPUT

  • Operating input voltage range, Vdc
    • 9 Min., 36 Typ., 75 Max.; 36Vin(nom)
    • 14 Min., 72 Typ., 160 Max.; 72Vin(nom)
  • Start up voltage, Vdc
    • 9 Max.; 36Vin(nom)
    • 14 Max.; 72Vin(nom)
  • Shutdown voltage, Vdc
    • 7.3 Min., 7.7 Typ., 8.1 Max.; 36Vin(nom)
    • 10 Min., 11 Typ., 12 Max.; 72Vin(nom)
  • Start up time, ms
    • 75 Typ., 100 Max.; Constant resistive load, Power up
    • 75 Typ., 100 Max.; Remote ON/OFF
  • Input transient voltage, Vdc
    • 8.1 Max.; 36Vin(nom), 100 mS, Max.
    • 12 Max.; 72Vin(nom)
  • Input surge voltage, Vdc
    • 100 Max.; 36Vin(nom), 1 second, Max.
    • 185 Max.; 72Vin(nom)
  • Input filter: Pi type
  • Remote ON/OFF Control, Vdc
    • Referred to -Vin pin
    • Short or 0 - 1.2; Negative logic DC-DC ON
    • Open or 3 - 12; (Standard) DC-DC OFF
    • Open or 3 - 12; Positive logic DC-DC ON
    • Short or 0 - 1.2; (Option) DC-DC OFF
    • -0.5 Min., 1 Max., mA; Input current of Ctrl pin
    • 3 Typ., mA; Remote off input current

OUTPUT

  • Voltage accuracy, %: -1 Min., 1 Max.
  • Line regulation, %
    • -0.1 Min., 0.1 Max.; Low line to high line at full load
  • Load regulation, %
    • -0.1 Min., 0.1 Max.; No load to full load
  • Voltage adjustability, %
    • -20 Min., 10 Max.; Max. output deviation is inclusive of remote sense
  • Remote sense, %
    • 10 Max.; % of Vout(nom). If remote sense is not being used, SENSE pins should connect to corresponding polrity OUTPUT pins.
  • Ripple and noise, mVp-p
    • 20MHz bandwidth
    • 75 Typ.; 5Vout, with a 1μF/25V X7R MLCC and a 22μF/25V POS-CAP
    • 100 Typ.; 12Vout, 15Vout, with a 22μF/25V X7R MLCC
    • 200 Typ.; 24Vout, 28 Vout, with a 4.7μF/50V X7R MLCC
    • 300 Typ.; 48Vout, 53 Vout, with a 2.2μF/100V X7R MLCC
  • Temperature coefficient, %/°C: -0.02 Min., 0.02 Max.
  • Transient response recovery time, μs
    • 250 Typ.; 25% load step change
  • Over voltage protection, Vdc
    • 120 Min., 135 Max.; % of Vout(nom); Hiccup mode
  • Over load protection, %
    • 120 Min., 140 Max.; % of lout rated; Hiccup mode
  • Short circuit protection: Continuous, automatic recovery

 

 

More Specifications: 

GENERAL

  • Isolation voltage
    • 1 minute, 72Vin(nom); Input to output; 3,000 Min. Vac
    • (Reinforced insulation); Input (output) to Base-Plate; 1,500 Min. Vac
    • 1 minute, 36Vin(nom); Input to output; 2,250 Min., Vdc
    • (Basic insulation); Input (output) to Base-Plate; 1,600 Min., Vdc
  • Isolation resistance, GΩ: 500Vdc; 1 Min.
  • Isolation capacitance, pF: 1,000 Max.
  • Switching frequency, kHz: 160 Min.; 180 Typ.; 200 Max.

 

 

ENVIRONMENTAL

  • Operating base-plate temperature, °C: With derating; -40 Min.; 105 Max.
  • Max. case temperature, °C: 105 Max.
  • Over temperature protection, °C: 110 Typ.
  • Storage temperature range, °C: -55 Min.; 125 Max.
  • Thermal impedance, °C/W
    • Module without assembly option; 8.3 Typ.
    • Only mount on the iron base-plate; 2.5 Typ.
    • Heat-sink type with 0.24” height; 7.4 Typ.
    • Heat-sink type with 0.5” height; 6.2 Typ.
    • Heat-sink type with 0.65” height; 5.1 Typ.
    • Heat-sink type with 1” height; 4.1 Typ.
  • Thermal shock: MIL-STD-810F
  • Shock: EN61373, MIL-STD-810F
  • Vibration: EN61373, MIL-STD-810F
  • Relative humidity: 5% to 95% RH

PHYSICAL 

  • Design meet safety standard: IEC/UL/EN6236801, EN50155, EN45545-2, UL: E193009, CB:UL(Demko)
  • Case material: Aluminum base-plate with plastic case
  • Potting material: Silicone (UL94 V-0)
  • Weight, g: 64g (2.26oz)
  • Dimensions: 2.28” × 1.45” × 0.50” (57.9mm × 36.8mm × 12.7mm)
  • MTBF: 8.297 × 10 hrs , MIL-HDBK-217F, Full load

 

EMC CHARACTERISTICS

  • EMI
    • Conditions: EN55032, EN50121-3-2; With external components. Level: Class A, Class B
  • ESD
    • Conditions: EN61000-4-2; Air ±8kV and Contact ±6kV. Level: Perf. Criteria A
  • Radiated immunity
    • Conditions: EN61000-4-3; 20V/m. Level: Perf. Criteria A
  • Fast transient
    • Conditions: EN61000-4-4; ±2KV. Level: Perf. Criteria A
    • Conditions: OFQC60-36S; With 2pcs of aluminum electrolytic capacitor
    • Conditions: OFQC60-72S; With 2pcs of aluminum electrolytic capacitor
  • Surge
    • Conditions: EN61000-4-5; EN55024: ±1kV and EN50155:±2kV. Level: Perf. Criteria A
    • Conditions: OFQC60-36S; With 2pcs of aluminum electrolytic capacitor.
    • Conditions: OFQC60-72S; With 2pcs of aluminum electrolytic capacitor.
  • Conducted immunity
    • Conditions: EN61000-4-6; 10 Vr.m.s. Level: Perf. Criteria A
  • Power frequency magnetic field
    • Conditions: EN61000-4-8; 100 A/m continuous; 1,000 A/m 1 second. Level: Perf. Criteria A

 

 

 

 

 

 

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