TH8061KDCA MELEXIS [Melexis Microelectronic Systems], TH8061KDCA Datasheet - Page 22

• Manufacturer Part Number: TH8061KDCA
• Description: Voltage Regulator with integrated LIN Transceiver
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

4.
4.1 Power Dissipation and operating range
The maximum power dissipation depends on the thermal resistance of the package and the PCB, the
temperature difference between Junction and Ambient as well as the airflow.
The power dissipation can be calculated with:
The power dissipation of the transmitter P
as well as on the bus voltage V
C
V
cycle on TxD of 50%
The permitted package power dissipation can be calculated:
If we consider that P
TH8061 – Datasheet
3901008061
SUP
L
and the bit rate. Figure 22 shows the dependence of power dissipation of the transmitter as function of
. The conditions for calculation of the power dissipation is R
P
Application Hints
P
I
V
D
D
CCmax
max
= (V
SUP
=
=
R
T
– V
j
THJ
R
D_TX_max
T
50
45
40
35
30
25
20
15
10
−
5
0
j
THJ
CC
T
5
−
−
) * I
A
A
Figure 22 - Power dissipation LIN transceiver @ 20kbit
T
−
A
A
= f(V
VCC
6
VSUP
−
P
+ P
BUS
SUP
D
7
_
=V
D_TX
) the max output current I
TX
−
8
BAT
VCC
_
Voltage Regulator with integrated LIN Transceiver
max
-V
9
D_TX
D
, the resulting termination resistance R
@
VSUP
10
depends on the transceiver configuration and its parameters
Page 22 of 36
11
V
SUP
12
[V]
VCC
13
on V
L
14
=500 Ω , C
CC
15
can be calculated:
16
L
=10nF, bit rate=20kbit and duty
17
L
, the capacitive bus load
18
TH8061
19
June 2004
Rev 007