Hi team,
I currently designing a light board,
Use 8pcs TLC5955 by daisy chain architecture (1 ch by 1 LED and based on 6mA/ch , total 384 zone),
Based on module conditions and keep the light board all on (PWM duty is 100%) ,
After testing for about 2 hour,
there will be (6 channel current abnormal x ICs) under unknown conditions. After comparison, this 6 channel is fixed to R15/G15/B15 and R14/G14/B14,
What can cause this problem?
Thanks for your response.
note:
1.Sometimes 8pcs IC abnormal, sometimes is 4pcs IC, the number of abnormal IC is not necessarily
2.After power on , only GCLK (8MHz)is keeping to IC, and SDA/SCL/LAT signals to low.
DSPRPT=1 ,others function is disable.
3.ICs surface temperature is about 60℃
4.Abnormal current that the current becomes smaller and only more than half of normal
