Other Parts Discussed in Thread: STRIKE
Dear TI Experts,
I am now using DS90UB926 with DS90UB927.
+/-2KV ESD will influence DS90UB927, which lead to the screen flick
I'd like to know how to fix it,here is the sch
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Dear TI Experts,
I am now using DS90UB926 with DS90UB927.
+/-2KV ESD will influence DS90UB927, which lead to the screen flick
I'd like to know how to fix it,here is the sch
hello,
regarding your ESD test result, please understand this issue from the system-level viewpoint. generally, if the ESD noise is injected into ub927/ub928's high speed serial diff. pairs, the high speed signal is easily impacted by this, which maybe results into flicker. also, if the ESD noise is injected into the panel side, this would result into flicker as well. so, pls check it from system level:
1. identify which section is the impacted by ESD strike?
a. ub927/ub928 link?
b. ub928-> panel link?
you can use the pattern test to isolate it.
2. for ub927, generally in the sch. design, the CMC and ESD device in FPD-Link channel would be helpful to bypass the ESD noise.
3. please make sure that the cable has good shielding performance
4. pls try to provide good grounding skills in your board design, you need have continuous GND referred to high speed signal and power supply
5. power supply rejection, pls use the recommended filtering design in ub927 d/s
6. if possible, pls use good shielding skills for ESD design
best regards,
Steven
Your result surprised me.
The ac coupling cap. is used to protect the receiver side due to hotswap. From the ESD test viewpoint, this 0.1uf cap. doesn't impact the esd performance as ESD is high freq. transient energy which would be coupled by this cap.
regards,
Steven