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Does TPS2320 have power on sequence requirement? For example IN1 should be added at first etc....
Now our customer is using channel1 is 12V line and channel2 is 5V line. They done 2 kinds of test as a following,
-----------------------------------------------------------Output of channel2 is shorted to GND condition,
1, 12V of channel1 is added at first, next 5V of channel2 is added. Then channel2 FET becomes off by detecting OC.2, 12V and 5V are added at same timing. Then TPS2320 is destroyed.-----------------------------------------------------------
Do you have any idea for this cause?
Best Regards,Kohei Sasaki
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In reply to Alex Triano:
Thank you for your support.I'm waiting for further information.
In reply to K. Sasaki14:
Sorry for pushing you.However our customer requires prompt information, so could you reply until the end of tomorrow?
In reply to Brian Daugherty:
Thank you for your support. If there is requirement that IN1 should be added at first, please let me know the reason and what will happen when the requirement is not met.
And I have additional question.Is there any possibility that other channel side is damaged at the same time when one channel side is damaged by EOS?I think there is no possibility if device internal circuit of each channel is independent each other.
Thank you for your answer.And I understood there is no requirement of power up sequence, and EOS can affect both channel.
Please let me know about current limit operation.Timer capacitor is charged after TPS2320 detects over current. At this time, does current keeps increasing until timer capacitor charged up to 0.5V?
At our customer's test, channel2 5V is added at first with output of channel2 is shorted to GND condition. After that channel1 12V is added.Then large ringing occurs on channel2 input. This ringing level is over ABS.However the ringing level is small when channel1 12V is added at first.
Best Regards,Kohei Sasaki
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