L6208QTR STMicroelectronics, L6208QTR Datasheet - Page 19

• Manufacturer Part Number: L6208QTR
• Description: Motor / Motion / Ignition Controllers & Drivers DMOS Dual Full Bridge Driver 5.6A
• Manufacturer: STMicroelectronics

Specifications of L6208QTR

• Product Category: Motor / Motion / Ignition Controllers & Drivers
• Rohs: yes

L6208Q
Figure 21. Overcurrent protection simplified schematic
Figure 22
recovering normal operation can be easily programmed by means of the accurate
thresholds of the logic inputs. It is affected by both C
reported in
overcurrent has been detected depends only on C
Figure
C
the value of C
delay time and the R
The resistor R
values for R
disable time.
μC or LOGIC
EN
V
DD
is also used for providing immunity to pin EN against fast transient noises. Therefore
24.
R
C
shows the overcurrent detection operation. The disable time t
EN
EN
Figure
EN
.
.
EN
EN
and C
EN
should be chosen as big as possible according to the maximum tolerable
should be chosen in the range from 2.2 kΩ to 180 kΩ. Recommended
23. The delay time t
EN
EN
40Ω TYP.
R
DS(ON)
value should be chosen according to the desired disable time.
are respectively 100 kΩ and 5.6 nF which allow to obtain 200 µs
TO GATE
LOGIC
OPEN-DRAIN
Doc ID 018710 Rev 2
INTERNAL
POWER SENSE
COMPARATOR
COMPARATOR
1 cell
OCD
OCD
DELAY
POWER DMOS
OVER TEMPERATURE
n cells
before turning off the bridge when an
EN
OUT1
I
EN
1A
FROM THE
BRIDGE B
value. Its magnitude is reported in
/ n
(I
1A
I
and R
A
REF
I
1A
+I
VS
2A
+
) / n
A
I
2A
EN
OUT2
I
values and its magnitude is
2A
POWER DMOS
A
/ n
n cells
HIGH SIDE DMOSs OF
DISABLE
Circuit description
THE BRIDGE A
POWER SENSE
before
1 cell
AM02563v1
19/33