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TLE6259-2 Datasheet(PDF) 6 Page - Infineon Technologies AG |
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TLE6259-2 Datasheet(HTML) 6 Page - Infineon Technologies AG |
6 / 18 page Final Datasheet TLE 6259-2 Version 2.06 6 2003-02-21 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, 1k W resistor and diode between bus and VS, whould cause a constantly drawn current via this path. The resulting resistance of this short to GND is lower than 1k W. 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 VS. For a more detailed information see the application circuit in figure 6 and 7. |
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