L6470 datasheet(17/70 Pages) STMICROELECTRONICS

17 / 70 page

L6470

Pin connection

Doc ID16737 Rev 4

17/70

4.1

Pin list

Table 6.

Pin description

No.

Name

Type

Function

HTSSOP

POWERSO

VDD

Power

Logic outputs 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

2, 26

4, 5, 33, 34

VSA

Power supply

Full bridge A power supply pin. It must be connected

to VSB.

12, 16

15, 16, 22, 23

VSB

Power supply

Full bridge B power supply pin. It must be connected

to VSA.

27, 13

1, 19

PGND

Ground

Power ground pin

2, 3

OUT1A

Power output

Full bridge A output 1

35, 36

OUT2A

Power output

Full bridge A output 2

17, 18

OUT1B

Power output

Full bridge B output 1

20, 21

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

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