STSPIN820 datasheet(12/29 Pages) STMICROELECTRONICS

No. de pieza	STSPIN820

Descripción Electrónicos	Advanced 256 microsteps integrated motor driver with step-clock and direction interface

PDF	29 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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12 / 29 page

Functional description

STSPIN820

12/29

DocID031065 Rev 2

Functional description

The STSPIN820 is a stepper motor driver integrating a microstepping sequencer (up to

1/256th step), two PWM current controllers and a power stage composed by 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 pin is forced low until the VS

voltage rises above the VSth(ON) threshold.

If the VS falls below the VSth(ON) - VSth(HYST) value the 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 forcing the STBY\RESET input

below the VSTBYL 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 exits the standby status, all of the control circuitry is reset at power-up condition.

STSPIN820 Datasheet(PDF) 12 Page - STMicroelectronics