T6818 ATMEL [ATMEL Corporation], T6818 Datasheet - Page 13

• Manufacturer Part Number: T6818
• Description: Triple Halfbridge DMOS Output Driver with Serial Input Control
• Manufacturer: ATMEL [ATMEL Corporation]

Application Circuit
Application Notes
4530C–BCD–11/03
Watchdog
U5021M
V
CC
V
CC
Enable
CLK
INH
CS
DO
DI
10
5
6
4
9
It is strongly recommended to connect the blocking capacitors at V
possible to the power supply and GND pins.
Recommended value for capacitors at V
Electrolytic capacitor C > 22 µF in parallel with a ceramic capacitor C = 100 nF. Value
for electrolytic capacitor depends on external loads, conducted interferences and
reverse conducting current I
Recommended value for capacitors at V
Electrolytic capacitor C > 10 µF in parallel with a ceramic capacitor C = 100 nF.
To reduce thermal resistance it is recommended to place cooling areas on the PCB as
close as possible to the GND pins.
Negative spikes at the output pins (e.g. negative spikes caused by an inductive load
switched off with a high side driver) may activate the overtemperature protection func-
tion of the T6818/T6828. In this condition, all outputs will be switched off simultaneously.
If this behavior is not acceptable or compatible with your application functionally, it is
necessary, that for switching on required outputs again, the SRR bit (Status Register
Reset) is set, to ensure a reset of the overtemperature function.
P
S
F
u.
n.
Output register
Input register
O
P
u.
L
n.
detect
detect
Fault
Fault
C
O
C
S
S
D
n.
u.
n.
u.
OUT3
2
n.
u.
n.
u.
n.
u.
n.
u.
detect
M
detect
Fault
Fault
n.
u.
n.
u.
u.
n.
n.
u.
12
OUT2
n.
u.
n.
u.
S
H
3
H
S
3
Serial interface
S
L
3
S
L
3
detect
detect
Fault
M
Out1,2,3
Fault
H
S
2
H
S
2
S
L
2
L
S
2
13
OUT1
H
S
1
(see “Absolute Maximum Ratings” on page 7).
H
S
1
S
L
1
L
S
1
R
R
T
S
P
S
CC
:
protection
Thermal
:
Control
logic
protection
Power-on
Charge
pump
reset
UV
T6818/T6828
11
14
3
1
7
8
GND
VCC
GND
GND
GND
CC
VS
and V
V
S
+
V
S
CC
BYT41D
+ +
as close as
V
13 V
Batt
V
5 V
CC
13