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STSPIN233

Description

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6

Description

The STSPIN233 device is a protected triple half-bridge motor driver.

6.1

Standby and power-up

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

below the VSTBYL threshold.

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

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

leaves the standby status, all the control circuitry is reset at power-up condition.

6.2

Motor driving

The outputs of the three half-bridges are directly driven through the logic input as listed in

Table 8.

6.3

Overcurrent and short-circuit protections

The device embeds a circuitry protecting each power output against the overload and short-

circuit conditions (short-circuit to ground, short-circuit to VS and short-circuit between

outputs).

When the overcurrent or the short-circuit protection is triggered, the power stage is disabled

and the EN\FAULT input is forced low through the integrated open-drain MOSFET

discharging the external CEN capacitor (refer to Figure 4).

The power stage is kept disabled and the open-drain MOSFET is kept ON until the

EN\FAULT input falls below the VRELEASE threshold, then the CEN capacitor is charged

through the REN resistor.

Table 8. ENx and INx truth table

EN\FAULT

ENx

INx

OUTx

'x' half-bridge condition

0

X

X

HiZ

Disabled

1

0

X

HiZ

Disabled

1

1

0

GND

Low side MOSFET ON

1

1

1

VS

High side MOSFET ON