DocID14493 Rev 11

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L6390

Smart shutdown function

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Smart shutdown function

The L6390 device integrates a comparator committed to the fault sensing function. The

comparator has an internal voltage reference Vref connected to the inverting input, while the

non-inverting input is available on the pin 10. The comparator input can be connected to an

external shunt resistor in order to implement a simple overcurrent detection function. The

output signal of the comparator is fed to an integrated MOSFET with the open drain output

available on the pin 2, shared with the SD input. When the comparator triggers, the device is

set in shutdown state and both its outputs are set to low level leaving the half-bridge in

tristate.

Figure 7. Smart shutdown timing waveforms