L6472 datasheet(17/69 Pages) STMICROELECTRONICS

17 / 69 page

L6472

Pin connection

Doc ID 022729 Rev 1

17/69

4.1

Pin list

Table 6.

Pin description

No.

Name

Type

Function

VDD

Power

Logic output supply voltage (pull-up reference)

VREG

Power

Internal 3 V voltage regulator output and 3.3 V external logic

supply

OSCIN

Analog input

Oscillator pin 1. To connect an external oscillator or clock source.

If this pin is unused, it should be left floating.

OSCOUT

Analog output

Oscillator pin 2. To connect an external oscillator. When the

internal oscillator is used this pin can supply 2/4/8/16 MHz. If this

pin is unused, it should be left floating.

Output

Charge pump oscillator output

Vboot

Supply voltage

Bootstrap voltage needed for driving the high-side power DMOS of

both bridges (A and B)

ADCIN

Analog input

Internal analog-to-digital converter input

VSA

Power supply

Full bridge A power supply pin. It must be connected to VSB

VSB

Power supply

Full bridge B power supply pin. It must be connected to VSA

PGND

Ground

Power ground pin

OUT1A

Power output

Full bridge A output 1

OUT2A

Power output

Full bridge A output 2

OUT1B

Power output

Full bridge B output 1

OUT2B

Power output

Full bridge B output 2

AGND

Ground

Analog ground.

Logical input

External switch input pin. If not used the pin should be connected

to VDD.

DGND

Ground

Digital ground

BUSY\SYNC

Open drain output

By default, this BUSY pin is forced low when the device is

performing a command. Otherwise the pin can be configured to

generate a synchronization signal.

SDO

Logic output

Data output pin for serial interface

SDI

Logic input

Data input pin for serial interface

Logic input

Serial interface clock

Logic input

Chip select input pin for serial interface

FLAG

Open drain output

Status flag pin. An internal open drain transistor can pull the pin to

GND when a programmed alarm condition occurs (step loss,

OCD, thermal pre-warning or shutdown, UVLO, wrong command,

non-performable command)

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