Design Article
How to select power line polarity protection diodes
Soo Man (Sweetman) Kim, Vishay
6/30/2012 3:48 PM EDT
ESD
ESD influences the operating stability and lifetime reliability of electronic modules in vehicles. ISO-10605 and JASO standard 5.8 specify testing conditions for this parameter.
Non-repetitive avalanche energy (EAS)
This non-repetitive avalanche energy of a diode specifies the maximum energy it can absorb in the reverse bias state to protect circuits from inductive kick back transients from motors and solenoids, or induced high reverse voltages. There is no automotive standard for this specification.
Temperature conditions for automotive electronics and components
The JASO specifies the operating temperature range for automotive electronics as – 40 to +100C based on their location, such as the trunk, engine, or other places.
Conclusion
By attention to diode rectifier characteristics, automotive polarity circuit protection can be ensured.
Soo Man (Sweetman) Kim is senior application manager at Vishay.
References:
Fulup, W. “Calculation of Avalanche Breakdown of Silicon P-N junctions.” Solid-State Electronics 10.1 (1967): 39-43
Hart, Daniel W. Introduction to Power Electronics. Taiwan: Prentice Hall / Pearson Education, 2002
Horowitz, Paul, and Winfield Hill. The Art of Electronics. Cambridge: Cambridge University Press, 1980.
ISO-10605: 2001: Road vehicles – Test methods for electrical disturbances from electrostatic discharge
ISO-16750-2: 2010: Road vehicles – Environmental conditions and testing for electrical and electronic equipment
ISO-7637-2: 2010: Road vehicles – Electrical disturbance by conduction and coupling – Part 2: Electrical transient conduction along supply lines only
JASO D001-94: Japanese automobile standard – General rules of environmental testing methods for automotive electronic equipment
IEC 61000-4-2: 1995 Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 2: Electrostatic discharge immunity test
ESD influences the operating stability and lifetime reliability of electronic modules in vehicles. ISO-10605 and JASO standard 5.8 specify testing conditions for this parameter.
Non-repetitive avalanche energy (EAS)
This non-repetitive avalanche energy of a diode specifies the maximum energy it can absorb in the reverse bias state to protect circuits from inductive kick back transients from motors and solenoids, or induced high reverse voltages. There is no automotive standard for this specification.
Temperature conditions for automotive electronics and components
The JASO specifies the operating temperature range for automotive electronics as – 40 to +100C based on their location, such as the trunk, engine, or other places.
Conclusion
By attention to diode rectifier characteristics, automotive polarity circuit protection can be ensured.
Soo Man (Sweetman) Kim is senior application manager at Vishay.
References:
Fulup, W. “Calculation of Avalanche Breakdown of Silicon P-N junctions.” Solid-State Electronics 10.1 (1967): 39-43
Hart, Daniel W. Introduction to Power Electronics. Taiwan: Prentice Hall / Pearson Education, 2002
Horowitz, Paul, and Winfield Hill. The Art of Electronics. Cambridge: Cambridge University Press, 1980.
ISO-10605: 2001: Road vehicles – Test methods for electrical disturbances from electrostatic discharge
ISO-16750-2: 2010: Road vehicles – Environmental conditions and testing for electrical and electronic equipment
ISO-7637-2: 2010: Road vehicles – Electrical disturbance by conduction and coupling – Part 2: Electrical transient conduction along supply lines only
JASO D001-94: Japanese automobile standard – General rules of environmental testing methods for automotive electronic equipment
IEC 61000-4-2: 1995 Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 2: Electrostatic discharge immunity test
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GREAT-Terry
7/9/2012 9:20 PM EDT
A good introduction to the subject matter. Many designer just assume the input supply of the automotive electronic be 12V and they didn't think about the load dump and reverse pulses until they found problem in lab approval.
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