CAN Driver IC Fault Review

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Presentation transcript:

CAN Driver IC Fault Review 2017.11.30

Part Name : SN65HVD233QDRQ1 Test Date : 30, Nov, 2017 CAN communication test for the IC (SN65HVD233QDRQ1) At this time. -------------------------------------------------------------------------------- Today’s 1st. Reporting a Test 15 PCB again. That result is below... ( 9AM in the My Office. ) - Pass is 14 PCB. - Fault is 1 PCB. 1 PCB goes to fault today. ( I didn’t do anything to the PCBs. ) I want to know why it is changing. --------------------------------------------------------------------------------------------------

Part Name : SN65HVD233QDRQ1 Test Date : 29, Nov, 2017 Fault doubt reason is below… 1. When CAN communication error : I was resolved fault, connecting to other can module with jumper wire. 2. I was try to rework a new IC : even hand-soldering, Fault was remained frequently. CAN communication test for the IC (SN65HVD233QDRQ1) At this time. -------------------------------------------------------------------------------- 1st. Reporting a Test 15 PCB. That result is below... ( 10AM in the My Office. ) - Pass is 8 PCB. - Fault is 7 PCB. -> Fault rate is about 24 ~ 45% 2nd Reporting a Test Fault 7 PCB. That result is below… ( 3PM in the My Office. ) - Pass is 4 PCB. - Fault is 3 PCB. 3rd Reporting a Test Remain 3 PCB. That result is below… ( 5PM in the My Office. ) - Pass is 3 PCB. 15 PCB is a not fault now. *** I don’t know why it was change. -------------------------------------------------------------------------------------------------- I guess, the SMT is not fault. The reason is other parts is all ok.

Designed Ciruit : SN65HVD233QDRQ1 LBK pin is 0V ( from MCU ) RS pin is connected 10k resistor only. Using ESD diode for CAN-Line.

Additional PCBs Test ANOTHER 6PCBS tEST

Another 6PCBs : SN65HVD233QDRQ1 Test Date : 29, Nov, 2017 CAN communication test for the IC (SN65HVD233QDRQ1) At this time. -------------------------------------------------------------------------------- Reporting a Test another 6PCB. That result is below... ( 6PM in the My Office. ) - Pass is 5 PCB. - Fault is 1 PCB. -------------------------------------------------------------------------------------------------- Test Date : 30, Nov, 2017 CAN communication test for the IC (SN65HVD233QDRQ1) At this time. -------------------------------------------------------------------------------- Reporting a Test another 6PCB. That result is below... ( 6PM in the My Office. ) - Pass is 5 PCB. - Fault is 1 PCB. This another 6PCBs Test result is not changed. -------------------------------------------------------------------------------------------------- At here, important is IC fault appears in my case. I had experience same situation about one month ago. ( I do careful the ESD damage when testing. ) This second time appears IC fault again. I want to know reason. My fault or IC fault ?