TH8065KDCAA MELEXIS [Melexis Microelectronic Systems], TH8065KDCAA Datasheet - Page 31

• Manufacturer Part Number: TH8065KDCAA
• Description: Voltage Regulator with LIN Transceiver and Watchdog
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

5. Operating during Disturbance
5.1 Operating without VSUP or GND
The absence of V
nodes. No reverse supply of the IC can appear if without GND or VSUP connection the BUS pin is on VBAT
level.
5.2 Short Circuit BUS against VBAT
The reaction of the IC depends on the send state of the transceiver:
5.3 Short Circuit BUS against GND
LIN bus is blocked. No influence on the TH8065.
5.4 Short Circuit TxD against GND
The LIN transceiver is permanently in the dominant state, which means the whole LIN bus. This state can
only be detected from the LIN controller. In this case the controller must switch off the LIN node via the EN
input of the TH8065. A thermal shut down of TH8065 will appear if the power dissipation will make an
overrun of T
5.5 TxD open
The internal pull-up resistor forces the LIN node to the recessive state. The communication between the
other bus-nodes will not be disturbed.
5.6 Short Circuit VCC against GND
The VCC pin is protected via a current limitation. This state is comparable with the behaviour in the sleep
mode.
5.7 Overload of VCC
Thermal switch off
The power dissipation is increasing if the load current is between I
temperature of >155°C is reached, the IC will be switched off. The voltage regulator will also be switched off
and a reset signal is forced.
If the current limitation is active the voltage on VCC drops down. If this voltage under-runs the threshold
V
5.8 Undervoltage VCC
The reset unit ensures the correct behaviour of the driver during under-voltage. The BUS pin generates the
recessive state if V
If V
TH8065 – Datasheet
3901008065
Over current
RES
CC
-
-
, a reset will be forced.
≥ V
Recessive
Dominant
MRes
J.
the TxD signal is transmitted to the bus. The receive mode is also active.
SUP
CC
< V
or GND connection will not influence or disturb the communication between other bus
overrun of T
LIN bus is blocked, no influence to the TH8065
Current limitation, thermal shut down of TH8065 if power dissipation will make an
MRes
(3.15V). The inputs EN, WDI and TxD have pull-up or pull-down characteristics.
J
Voltage Regulator with LIN Transceiver and Watchdog
Page 31 of 40
VCC_max
and I
LVCC
TH8065
. If the max junction
May 2006
Rev 003