Target Data

TLE 6285

Version 1.02

7

2002-05-15

In case the voltage regulator control input is not connected to INH output or the

microcontroller is active respectively, the TLE6285 can be set in normal operation mode

without a wake-up via the communication bus.

2.2

LIN Transceiver

The LIN Transceiver has already a pull up resistor of 30k

W as termination implemented.

There is also a diode in this path, to protect the circuit from feedback of voltages from

the bus line to the power supply. To configure the TLE 6285 as a master node, an

additional external termination resistor of 1k

W is required. To avoid reverse currents from

the bus line into the battery supply line in case of an unpowered node, it is also

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, application circuit).

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.

2.3

Input Capacitor

of approx. 1

input capacitance can be damped. The output capacitor is necessary for the stability of

the regulating circuit. Stability is guaranteed at values

³ 22 mF and an ESR of £ 5 W

within the operating temperature range. For small tolerances of the reset delay the

spread of the capacitance of the delay capacitor and its temperature coefficient should

be noted.

2.4

Voltage regulator

The 6285 incorporates a PNP based very low drop linear voltage regular. It regulates the

circuit protects the device against potential caused by damages overcurrent and

overtemperature.

The internal control circuit achieves a 5 V output voltage with a tolerance of

± 2% in the

The device includes a power on reset and an under voltage reset function with adjustable

reset delay time and adjustable reset switching threshold as well as a sense control/early

warning function. The device includes an inhibit function to disable it when the ECU is

not used for example while the motor is off.