11
9120A–AUTO–01/08
ATA6831/ATA6832 Driver ICs
Undervoltage detection can be demonstrated with a variable power supply. As soon as the sup-
ply voltage VVS falls below threshold, all activated loads are switched off, and the PSF bit in the
output register is set. If the voltage returns to the normal level, the outputs switch on again to
their previous setting. The PSF bit latches the undervoltage occurrence and needs to be reset
by SRR activation in the input register.
If the IC is not used in the typical H-bridge arrangement, parallel operation of outputs is possible
for more powerful applications. Two output stages at a time can be paralleled to achieve cur-
rents up to 2A.
In any case, the IC's maximum power dissipation has to be considered. Excellent thermal con-
tact to an on-board cooling area is obligatory for powerful applications.
Note:
x = do not care for this demonstration; if set to high: overcurrent shutdown is active
Table 6-1.
Configuration Table of Datawords Required to Set Certain Functions of the Appli-
cation Circuit (See
)
Bit 13
(OCS)
Bit 6
(HS3)
Bit 5
(LS3)
Bit 4
(HS2)
Bit 3
(LS2)
Bit 2
(HS1)
Bit 1
(LS1)
Bit 0
(SRR)
M1
Forward
x
H
H
M1
Reverse
x
H
H
M2
Forward
x
H
H
M2
Reverse
x
H
H
