STSPIN840 datasheet(12/28 Pages) STMICROELECTRONICS

12 / 28 page

Detailed description

STSPIN840

12/28

DocID031835 Rev 1

Detailed description

The STSPIN840 is a dual brush DC motor driver integrating two PWM current controllers

and a power stage composed of two fully-protected full-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 pins are forced low until the VS

voltage rise above the VSth(ON) threshold.

If the VS falls below the VSth(ON) - VSth(HYST) value power stage is immediately disabled and

the FAULT pins are forced low.

Figure 3. UVLO protection management

The device provides a low consumption mode, which is set by forcing the STBY\RESET

input below the VSTBYL threshold.

When the device is in standby status the power stage is disabled (outputs are at 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 to the power-up condition.

FAULT

POWER

stage

VSth(ON)

VSth(ON) - VSth(HYST)

DISABLED

Internal OD

released

Internal OD

released

Outputs state

according to

input status

Outputsstate

according to

input status

AM040368

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