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2 votes
2 answers
2k views

Zener diode response time

I have the below circuit: Forward diode D0002 - Datasheet SIJ series for reverse protection and C0001-C0004 capacitors for ESD protection. Zener diode - Datasheet - 36V reverse breakdown. Question : ...
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2 votes
0 answers
407 views

Automotive reverse current and transient protection

Adding reverse polarity and reverse current protection to an automotive circuit seems a bit challenging, especially when driving loads in the 10 A range (e.g. seat heater). Diodes on the power line ...
sg1's user avatar
  • 21
1 vote
2 answers
923 views

Reverse voltage spike protection on high-side of a (coiled) relay without flyback diode

I have a microcontroller interfacing with a normally-open automotive relay on the high-side, through a P-MOSFET. When the microcontroller closes the P-MOSFET's Source & Drain (by sending LOW ...
biasedbit's user avatar
  • 113
1 vote
1 answer
55 views

51 V clamp on load dump; will this IC survive?

This is about the Texas Instruments TPS2HB50-Q1 40-V, 50-mΩ Dual-Channel Smart High-Side Switch. Vbb is the battery (suppy) voltage Page 7 gives a VbbCLAMP > 58V ...
kellogs's user avatar
  • 1,061
0 votes
1 answer
480 views

Transient Voltage Suppression Diode with no current limiting component

BATT= 16V 27V Rated TVS Diode spec - TVS Diode Datasheet The circuit : My questions: I want to understand what happens when the BATT voltage goes above the TVS diode clamping voltage. For both ...
user avatar
0 votes
1 answer
897 views

Transient voltage protection on an automotive circuit

I am currently working on a DIY quickshifter. This stops the spark for a very short time when changing up gears so that gears can be changed at full throttle. I have a working circuit, but it ...
Rickerman's user avatar
0 votes
0 answers
18 views

Standards/Insight into Transient Protection of Industrial/Construction Equipment

I am designing a device that will be connected to the 12 or 24V battery of certain construction and industrial equipment. I'm aware that because these are industrial vehicles/equipment we will need ...
Andy M's user avatar
  • 43
0 votes
1 answer
61 views

Automotive transients: which rail goes how?

Presumably it would depend on each transient http://www.sft-lab.com.cn/uploads/ISO_16750-2-2010.pdf http://sft-lab.com/uploads/ISO7637-2-2011.pdf Or is there a more general rule - i.e. when a -100V ...
kellogs's user avatar
  • 1,061
0 votes
0 answers
155 views

How to inject load dump transient in LTspice

I wanted to simulate load dumping in LTspice by introducing a transient at load side. But I didn't find any block in LTspice library to do so. Can anyone assist me in that regard?
Alison's user avatar
  • 357