DocID029313 Rev 3

13/26

STSPIN240

Functional description

26

6

Functional description

The STSPIN240 is a dual brush DC motor driver integrating two PWM current controllers

and a power stage composed by two fully-protected full-bridges.

6.1

Standby and power-up

The device provides a low settable consumption mode forcing the STBY\RESET input

When the device is in standby status, the power stage is disabled (outputs are in high

impedance) and the supply to the integrated control circuitry is cut off.

6.2

Motor driving

The outputs of each bridge are controlled by the respective PWMx and PHx inputs as listed

in Table 8.

Table 8. Truth table

EN\FAULT

PHx

PWMx

OUTx1

OUTx2

Full-bridge condition

0

X

X

HiZ

HiZ

Disabled

1

0

0

GND

GND

Both LS on

1

0

1

GND

VS

HS2 and LS1 on (current X1

 X2)

1

1

0

GND

GND

Both LS on

1

1

1

VS

GND

HS1 and LS2 on (current X1

 X2)