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PYD20 Manual

 

DC-DC Converter Isolated, 20W, 2x1”, PCB Mount 

 

1.  P

RODUCT 

D

ESCRIPTION

 

The PYD20 series are board mount 20W DC-DC converters in a rugged 2 x 1 inch housing with silicone 

potting. They provide a regulated and galvanically isolated output, available as either single voltage or ± dual 
output voltages. 
The most outstanding features of this series are the exceptionally wide input voltage range from 8.5V to 

160V (18:1) and the high input/output isolation strength of 3000Vac. 
The wide allowed case temperature range from -40°C to +105°C, the low heat generation, due to the high 

efficiencies up to 90% and the high shock and vibration resistance thanks to the potted design make this 

device suitable for nearly every situation. 
Another unique feature is the compliance with the standard EN 50155, which is an international standard 

covering electronic equipment used on rolling stock for railway applications. In combination with the wide 

input voltage range, there are many application opportunities in this segment. Further applications for this 

DC-DC converter can be found in Distributed Power Architecture (DPA), telecommunications, battery-
powered devices, measurement and laboratory equipment, devices in industrial environments, and many 

other areas. 

2.  P

RODUCT 

F

EATURES

 

-  2 x 1 Inch (50.8 x 25.4mm) Industry Standard Footprint 
-  3000Vac Input to Output Isolation 
-  8.5-160V (18:1) Wide-range Input 
-  Single or ± Dual Output Voltages Available 
-  EN 50155 Railway Compliant 
-  IEC 62368-1 (ICT) Approved 
-  High Shock and Vibration Resistance due to Potted Design 
-  Efficiency up to 90% and Low No-load Power Consumption 
-  -40 to +105°C Operating Case Temperature Range 
-  Remote ON/OFF Input 

3.  I

NTENDED 

U

SE

 

This device is designed and manufactured as a component part to be mounted on a pc-board and to be 

installed in electronic devices.  
This device is intended for commercial use, such as in industrial control, process control, monitoring and 
measurement equipment or the like.  
Additionally, this device is also designed for equipment that is intended for use in railway rolling stock 

applications according to EN 50155. 
Do not use this device in equipment, where malfunctioning may cause severe personal injury or threaten 
human life without additional appropriate safety devices, that are suited for the end-application. 
If this device is used in a manner outside of its specification, the protection provided by the device may be 

impaired. 

All parameters are typical values specified at nominal input voltage, nominal output load, 25°C ambient and after a 5 minutes run-in time unless  
otherwise noted. The information presented in this document is believed to be accurate and reliable and may change without notice. 

For additional information, please visit 

https://product.tdk.com/en/power/py

.

 

2/17

DOC-ID: 260921 – Issue 1

Summary of Contents for PYD20 Series

Page 1: ...11 13 Protection Features 11 14 Approvals and Regulatory Compliances 12 15 Rail Applications 12 16 Thermal Consideration and Derating 13 17 EMC Considerations 13 18 Remote ON OFF Function 15 19 Outpu...

Page 2: ...mm Industry Standard Footprint 3000Vac Input to Output Isolation 8 5 160V 18 1 Wide range Input Single or Dual Output Voltages Available EN 50155 Railway Compliant IEC 62368 1 ICT Approved High Shock...

Page 3: ...should occur during installation or operation immediately turn power off and send unit to the factory for inspection Install the device in an enclosure providing protection against electrical mechanic...

Page 4: ...5 of the total load For single output voltage models the output voltage can be adjusted with an external resistor connected between the TRIM pin and the output voltage The device is equipped with an...

Page 5: ...diode should be at least equal to the maximum possible input voltage Capacitor C1 and Diode D2 These two components provide higher transient resistance surge and burst at the input and are required if...

Page 6: ...olated 20W Input 8 5 160V Output 15V 1 33A 2x1 inch pcb mount PYD20 72WD12 DC DC converter isolated 20W Input 8 5 160V Output 12V 0 83A 2x1 inch pcb mount PYD20 72WD15 DC DC converter isolated 20W Inp...

Page 7: ...Altitude Max 5000m 16 400ft Atmospheric pressure 110 54kPa Vibration 20Hz 1kHz 0 04g2 Hz 1 2kHz 6dB octave 60 minutes per axis According to MIL STD 810F random vibration units are operational Shock 50...

Page 8: ...ses vs output load PYD20 72WD12 Efficiency and power losses vs output load All parameters are typical values specified at nominal input voltage nominal output load 25 C ambient and after a 5 minutes r...

Page 9: ...l parameters are typical values specified at nominal input voltage nominal output load 25 C ambient and after a 5 minutes run in time unless otherwise noted The information presented in this document...

Page 10: ...Through hole 0 051 1 30 Top view pad 0 064 1 63 Bottom view pad 0 102 2 60 Pin assignment Pin Single output Dual outputs 1 V Input V Input 2 V Input V Input 3 V Output V Output 4 TRIM V Output 5 V Ou...

Page 11: ...Input surge voltage Max 200Vdc For maximal 100ms Output over voltage protection OVP 6 2Vdc 15Vdc 18Vdc 15Vdc 18Vdc 30Vdc Zener diode type For 5V output For 12V output For 15V output For 12V output Fo...

Page 12: ...e for railroad applications For details see application note for railway application EN 50155 Railway applications Rolling stock Electronic equipment EN 45545 2 Fire protection on railway vehicles Par...

Page 13: ...dels 2 3 1 The derating is not hardware controlled The user has to take this into consideration to stay below the de rated current limits in order not to overload the unit 17 EMC CONSIDERATIONS In ter...

Page 14: ...pacitor 120 F 220V NCC KXJ Aluminum capacitor 470pF 400Vac Y1 capacitor TDK CD series 1 5nF 400Vac Y1 capacitor TDK CD series 2 2nF 400Vac Y1 capacitor TDK CD series 1 4mH 0 4mmx1 13T ACME A151 T10x5x...

Page 15: ...rent of 1mA typically 0 4mA to be activated The maximal allowed voltage open circuit voltage for this pin is 160Vdc Positive logic standard Converter ON open or 4 160V Converter FF closed or 0 1 2V 6...

Page 16: ...2 36 12 72 13 08 13 44 13 8 20 16 12 8 4 3 6 9 12 15 R up 93820 37910 19270 9950 4360 R down 1550 8700 20630 44490 116060 Resistor values for adjusting the 15V output model Output V 12 0 12 6 13 2 13...

Page 17: ...ed age TRIM 4 Vout 5 Vout 3 Load PYD 6 RC 2 Vin 1 Vin D1 C1 R1 D2 Vin Vin D2 To prevent the stored energy from flowing in the wrong direction and not being available for the DC DC converter Use only...

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