SLOS948 February 2019 TAS6424M-Q1
The DC load diagnostics are used to verify the load connected. The DC diagnostics consists of four tests: short-to-power (S2P), short-to-ground (S2G), open-load (OL), and shorted-load (SL). The S2P and S2G tests trigger if the impedance to GND or a power rail is below that specified in the Specifications section. The diagnostic detects a short to vehicle battery, even when the supply is boosted. The SL test has an I2C-configurable threshold depending on the expected load to be connected. Because the speakers connected to each channel might be different, each channel can be assigned a unique threshold value. The OL test reports if the select channel has a load impedance greater than the limits in the Specifications section.