JAJSFL0A June 2018 – January 2019 TLC6946 , TLC6948
PRODUCTION DATA.
The LED-open detection (LOD) function detects faults caused by an open circuit in any LED string or a short from OUTn to ground with low impedance. It does this by comparing the OUTn voltage to the LOD-detection threshold-voltage level set by LODVTH in the function control register. If the OUTn voltage is lower than the programmed voltage, the corresponding output LOD bit is set to 1 to indicate an open LED. Otherwise, the output of that LOD bit is 0. LOD data output by the detection circuit are valid only during the on period of that OUTn output channel.