5

Functional description

The STSPIN830 is a 3-phase motor driver integrating a PWM current limiter and a power stage composed by

three fully-protected half-bridges.

5.1

Power supply and standby

The device is supplied through the VS pins, the two pins must be at the same voltage.

At power-up the power stage is disabled and the FAULT pin is forced low until the VS voltage rise above the

are forced low.

Vs

Internal OD

released

Internal OD

released

Outputs state

according to

input status

Outputs state

according to

input status

DISABLED

POWER

stage

FAULT

threshold.

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 strongly reduced. When the device leaves the standby status, all the control

circuitry is reset at power-up condition.

5.2

Logic inputs

The STSPIN830 offers two alternative method to drive the power stage, the proper can be selected setting the

status of MODE pin.

If MODE pin is set low (connected to GND) the output of each half bridge is controlled by the respective ENx and

INx inputs.

If MODE pin is set high the output of each half bridge is controlled by the respective INxH and INxL inputs.

In both cases the status of the power bridge is also determined by the PWM current limiter as indicated in Section

5.3 PWM current limiter.

Note:

The MODE pin status must not be changed during device working.

When the EN\FAULT input is forced low the power stage is immediately disabled (all MOSFETs are turned off).

The pin is also used as FAULT indication through the integrated open-drain MOSFET as described in paragraph

Section 5.4 Device protections and Section 5.5 ESD protection strategy.

STSPIN830

Functional description

DS12584 - Rev 2

page 9/27