Circuit description
L6206Q
The disable time (tDISABLE), before recovering normal operation, can be easily programmed
by means of the accurate thresholds of the logic inputs. It is affected either by CEN or REN
values and its magnitude is reported in Figure 12. The delay time (tDELAY), before turning off
the bridge when an overcurrent has been detected, depends only on the CEN value. Its
magnitude is reported in Figure 13.
CEN is also used for providing immunity to pin EN against fast transient noises. Therefore
the value of CEN should be chosen as big as possible according to the maximum tolerable
delay time and the REN value should be chosen according to the desired disable time.
The resistor REN should be chosen in the range from 2.2 k to 180 k. Recommended
values for REN and CEN are respectively 100 k and 5.6 nF which allow a 200 µs disable
time to be obtained.
Figure 9. Overcurrent protection simplified schematic
32:(56(16(
FHOO
287$ 96$ 287$
+,*+6,'('026V2)
7+(%5,'*($
&RU/2*,&
9
5(1 (1$
&(1
,$ ,$
72*$7(
/2*,&
32:(5'026
QFHOOV
2&'
&203$5$725
,$ Q
5'621
7<3
,17(51$/
23(1'5$,1
,$,$Q
,5()
29(57(03(5$785(
32:(5'026
QFHOOV
,$ Q
32:(56(16(
FHOO
$0Y
12/27
DocID022028 Rev 3