L6374

Application note

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Application note

It is recommended not to leave the Ref pin (pin 11) floating: if not used with an external

voltage reference, it is better to connect an external capacitor (of at least 10 nF) between

this pin and ground.

This capacitor filters the voltage reference against voltage spikes that can be generated by

the commutation of the output stages.

This is very common using capacitive loads: in fact, the initial transient of such loads

behaves like a short circuit, so the current flowing through the outputs presents very high

spikes.

Moreover, if the device is used as a line receiver. (i.e. the input signals can go below ground)

it is required not to leave the Ref pin (pin 11) floating: in this case, the pin can be connected

to ground or to a fixed external voltage reference.