The second classification of a loss of ground
fault when designing with a TI high-side switch is the loss of
ground of the entire module. As high-side switches generally
power off board loads, this can be a loss of ground of the
entire module or board such as an electronic control unit (ECU).
illustrates this condition.
Figure 1-2 Loss of Module Ground
For both loss of local device ground and loss of global
module ground, TI high-side switches will have built-in
protection mechanisms to disable output and prevent damage. In
this automatic shutoff condition, the device turns off the
output to protect the downstream load. Once the ground reference
is reestablished, the device returns to normal operation and the
output follows the relevant signal on the IN pin.