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TLE6208-3-G Datasheet(PDF) 5 Page - Infineon Technologies AG |
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TLE6208-3-G Datasheet(HTML) 5 Page - Infineon Technologies AG |
5 / 21 page TLE 6208-3 G Data Sheet 5 2001-05-10 1.5 Circuit Description Figure 2 shows a block schematic diagram of the module. There are 3 halfbridge drivers on the right-hand side. An HS driver and an LS driver are combined to form a halfbridge driver in each case. The drivers communicate via the internal data bus with the logic and the other control and monitoring functions: undervoltage (UV), overvoltage (OV), overtemperature (TSD), charge pump and fault detect. Two connection interfaces are provided for supply to the module: All power drivers are connected to the supply voltage V S. These are monitored by overvoltage and undervoltage comparators with hysteresis, so that the correct function can be checked in the application at any time. The logic is supplied by the V CC voltage, typ. with 5 V. The VCC voltage uses an internally generated Power-On Reset (POR) to initialize the module at power-on. The advantage of this system is that information stored in the logic remains intact in the event of short- term failures in the supply voltage V S. The system can therefore continue to operate following V S undervoltage, without having to be reprogrammed. The “undervoltage” information is stored, and can be read out via the interface. The same logically applies for overvoltage. “Interference spikes” on V S are therefore effectively suppressed. The situation is different in the case of undervoltage on the V CC connection pin. If this occurs, then the internally stored data is deleted, and the output levels are switched to high-impedance status (tristate). The module is initialized by V CC following restart (Power-On Reset = POR). The 16-bit wide programming word or control word (see Table Input Data Protocol) is read in via the DI data input, and this is synchronized with the clock input CLK. The status word appears synchronously at the DO data output (see Table Diagnosis Data Protocol ). It is also possible to connect two TLE 6208-3 G in a daisy chain configuration. The DO data output of one device is connected with the DI data input of the second device. In this configuration these two devices are controlled with a single CSN chip select and using a 32-bit wide control word. The transmission cycle begins when the chip is selected with the CSN input (H to L). If the CSN input changes from L to H then the word which has been read in becomes the control word. The DO output switches to tristate status at this point, thereby releasing the DO bus circuit for other uses. The INH inhibit input can be used to cut off the complete module. This reduces the current consumption to just a few µA, and results in the loss of any data stored. The output levels are switched to tristate status. The module is reinitialized with the internally generated POR (Power-On Reset) at restart. This feature allows the use of this module in battery-operated applications (vehicle body control applications). |
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