L6788A

Pins description and connection diagram

Doc ID 15341 Rev 2

9/18

38

VCC1_IC

Device supply voltage pin. The operative supply voltage is 12 V ± 10%.

Connect to 12 V_BUS and filter with RC network (R = 2.2 /0603 size, and

C=1x1 µF MLCC capacitor vs. PGND).

39

LGATE1

Channel 1 LS driver output. Driver can support 12 V bus voltage.

A small series resistor helps in reducing device-dissipated power.

40

PHASE1

Channel 1 HS driver return path. Connected to the HS1 MOSFET source and

provides return path for the HS driver of channel 1.

41

PGND

Power ground pin (LS drivers return path). Connect to power ground plane.

Exposed pad connects also the silicon substrate. As a consequence it makes

a good thermal contact with the PCB to dissipate the power necessary to drive

the external MOSFETs. Connect it to the power ground plane using 4.2x4.2

mm square area on the PCB and with sixteen vias to improve electrical and

thermal conductivity.

Table 2.

Pin description (continued)

Pin n°

Name

Description