INFINEON TLE 6259-2 User Manual
Final Datasheet, Version 2.06, 2003-02-21
现货库存、技术资料、百科信息、热点资讯，精彩尽在鼎好!
LIN Transceiver
TLE 6259-2
Automotive and
Industrial
Never stop thinking.
Single-Wire-Transceiver TLE 6259-2
Final Datasheet
1Overview
1.1 Features
• Single-wire transceiver, suitable for LIN protocol
• Transmission rate up to 20 kBaud
• Compatible to LIN specification 1.2
• Compatible to ISO 9141 functions
• Very low current consumption in sleep mode
• Control output for voltage regulator
• Bus short to GND protection
• Short circuit proof to ground and battery
• Overtemperature protection
P-DSO-8-3, -6
Type Ordering Code Package
TLE 6259-2G Q 67006 - A 9596 P-DSO-8-3
Description
The TLE 6259-2 is a monolithic integrated circuit in a P-DSO-8-3 package. It works as
an interface between the protocol controller and the physical bus. The TLE 6259-2 is
especially suitable to drive the bus line in LIN systems in automotive and industrial
applications. Further it can be used in standard ISO9141 systems. The TLE6259-2 has
a BUS short to GND feature implemented, to avoid a battery decharge.
In order to reduce the current consumption, the TLE 6259-2 offers a sleep operation
mode. In this mode a voltage regulator can be controlled to minimize the current
consumption of the whole application. A wake-up caused by a message on the bus,
enables the voltage regulator and sets the RxD output LOW until the device is switched
to normal operation mode.
®
The IC is based on the Smart Power Technology SPT
which allows bipolar and CMOS
control circuitry in accordance with DMOS power devices existing on the same
monolithic circuit.
The TLE 6259-2 is designed to withstand the severe conditions of automotive
applications.
Version 2.06 2 2003-02-21
1.2 Pin Configuration (top view)
Final Datasheet TLE 6259-2
RxD
EN
TxD
Figure 1
1.3
Pin Definitions and Functions:
Pin No. Symbol Function
1
2
3
4
P-DSO-8-3
8
7
6
5
INH
Vs
BusVcc
GND
1RxDReceive data output; integrated pull up, LOW in dominant state,
2ENEnable input; integrated 30 kW pull down, transceiver in normal
operation mode when HIGH
3V
CC
5V supply input;
4TxDTransmit data input; integrated pull up, LOW in dominant state
5GNDGround;
6BusBus output/input; internal 30 kW pull up, LOW in dominant state
7VsBattery supply input;
8INHInhibit output; to control a voltage regulator, becomes HIGH
when wake-up via LIN bus occurs
Version 2.06 3 2003-02-21
1.4 Functional Block Diagram
Final Datasheet TLE 6259-2
Figure 2
Vs
Bus
7
30 k
9
6
Output
Stage
Driver
Mode
Control
30 k
9
8
INH
3
Vcc
2
EN
Temp.-
Protection
Filter
4
TxD
1
RxD
Receiver
TLE 6259-2G
5
GND
Version 2.06 4 2003-02-21
1.5 Application Information
Normal Mode
Final Datasheet TLE 6259-2
Start Up
Power Up
EN
high high
EN
low
EN
(V
high
CC
ON)
Sleep Mode
EN
low floating
1)
after wake-up via bus
2)
ON when INH not connected to voltage regulator
3)
after start up
INH
OFF
Figure 3: operation mode state diagram
VccINH
ON
V
CC
EN high
Stand-By
RxD
low
high
V
CC
1)
ON
3)
INH
EN
low high
2)
Wake Up
t > t
WAKE
Master Termination
For fail safe reasons, the TLE6259-2 already has a pull up resistor of 30kW implemented.
To achieve the required timings for the dominant to recessive transition of the bus signal
an additional external termination resistor of 1kW is required. It is recommended to place
this resistor in the master node. To avoid reverse currents from the bus line into the
battery supply line in case of an unpowered node, it is recommended to place a diode in
series to the external pull up. For small systems (low bus capacitance) the EMC
performance of the system is supported by an additional capacitor of at least 1nF in the
master node (see figure 6 and 7, application circuit).
External Capacitors
An capacitor of 22µF at the supply voltage input V
buffers the input voltage. In
S
combination with the required reverse polarity diode this prevents the device from
detecting power down conditions in case of negative transients on the supply line.
Version 2.06 5 2003-02-21
Final Datasheet TLE 6259-2
The 100nF capacitors close to the VS pins of the 6259-2 and the voltage regulator help
to improve the EMC behavior of the system.
Sleep Mode
In order to reduce the current consumption the TLE 6259-2 offers a sleep operation
mode. This mode is selected by switching the enable input EN low (see figure 3, state
diagram). In the sleep mode, a voltage regulator can be controlled via the INH output in
order to minimize the current consumption of the whole application. A wake-up caused
by a message on the communication bus, automatically enables the voltage regulator by
switching the INH output high. In parallel the wake-up is indicated by setting the RxD
output LOW. When entering the normal mode this wake-up flag is reset and the RxD
output is released to transmit the bus data.
In case the voltage regulator control input is not connected to INH output or the
microcontroller is active respectively, the TLE6259-2 can be set in normal operation
mode without a wake-up via the communication bus.
Bus Short to GND Feature
The TLE6259-2 also has a BUS short to GND feature implemented, in order to protect
the battery from running out of charge. A normal master termination connection like
described above, 1kW resistor and diode between bus and V
, whould cause a
S
constantly drawn current via this path. The resulting resistance of this short to GND is
lower than 1kW. To avoid this current during a generator off state, like a parked car, the
sleep mode has a bus short to GND feature implemented in the 6259-2. This feature is
only applicable, if the master termination is connected with the INH pin, instead of the
. For a more detailed information see the application circuit in figure 6 and 7.
V
S
Version 2.06 6 2003-02-21
Loading...