Datasheet

DocID13183 Rev 5 9/18
STA516B Power supply and control sequencing
18
4 Power supply and control sequencing
To guarantee correct operation and reliability, the recommended power-on sequence as
given below should be followed:
 Apply V
CC
and V
L
, in any order, keeping PWRDN low in this phase
 Release PWRDN from low to high, keeping TRISTATE low (until V
DD
and V
SS
are
stable)
 Release TRISTATE from low to high
Always maintain PWM inputs INxy < V
L
.
Figure 5. Power-ON sequence
Power-OFF sequence:
– When TRISTATE or PWRDN go low, the outputs go into HiZ state
– Inputs INxy are removed before VL is removed
– VL can be removed before or after VCC