STSPIN32G4 datasheet(20/48 Pages) STMICROELECTRONICS

20 / 48 page

Figure 14. Gate driver block diagram

BOOTx

GHSx

OUTx

GLSx

SCREF

To control

logic

VCC

VDSth

VBOOT1

VCC

A couple of digital inputs drive each half-bridge gate driver: one INLx signal for the low-side driving and one INHx

signal for the high-side driving. High input implies the gate driver turns on the respective external MOSFET, with

low value the gate driver turns it off.

5.2.1

Interlocking

The gate driver provides interlocking function, so the high-side and low-side MOSFETs of the same half-bridge

cannot be both on at the same time.

Table 9. Gate driver control logic with interlocking

INHx

INLx

High-side gate driver

Low-side gate driver

Sink current (Turn-off)

Source current (Turn-on)

Sink current (Turn-off)

The interlocking function can be disabled setting the ILOCK bit. In this case both the high-side and low-side

MOSFETs can be turned on at the same time.

Table 10. Gate driver control logic without interlocking

INHx

INLx

High-side gate driver

Low-side gate driver

Sink current (Turn-off)

Source current (Turn-on)

Sink current (Turn-off)

Source current (Turn-on)

STSPIN32G4

Gate drivers

DS13630 - Rev 1

page 20/48

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