DocID025240 Rev 2

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AN4355

Supply management

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Figure 8. Gate drivers supply circuit

generated through the integrated linear regulator the VCCREG pin must be connected to

diode is turned on and the device can be damaged.

The device can be protected from this event adding an external low drop diode between the

VCCREG and VCC pins.

In order to supply directly the logic the external supply voltage must be connected to both

the VREG and VCCREG pins; this way the internal linear regulator is disabled.

Figure 9. Logic supply circuit