Gate driver specs and implementation

AN4671

14/17

DocID027654 Rev 1

The STGAP1S driver features 5 A current capability and the output driver section provides

a rail-to-rail output with the possibility of using a negative gate driver supply. Furthermore,

separate sink and source outputs provide high flexibility and facilitate BoM reduction for

external components.

The Miller clamp protection function is included to control the Miller current during power

stage switching in half-bridge configurations. When the power switch is in the OFF state,

the driver operates to avoid the induced turn-on phenomenon that may occur due to the

During the turn-off period, the switch gate is monitored via the CLAMP pin. The CLAMP

creating a low impedance path between the switch gate and the VL pin, see the figure

below.

Figure 14: Example of Miller clamp protection connection