전자부품 데이터시트 검색엔진 |
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TLE6280 데이터시트(PDF) 7 Page - Infineon Technologies AG |
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TLE6280 데이터시트(HTML) 7 Page - Infineon Technologies AG |
7 / 24 page Datasheet TLE6280GP & & NAND Vmfp x 2 MFP Shoot Through 80ns 1.45 / 1.7V Gate control 4.5V IHx ILx Levelshifter Dissable = Reset Fig. 4: Block diagram of internal structure of MFP pin Shoot through protection / option As already mentioned, the device has a built-in shoot-through protection, to avoid a simulta- neous activation of high- and low-side switch in one half-bridge. In case there is a short circuit in the bridge, the driver will switch off all external Mosfets. If there is still current flowing in the motor, it is possible for the user to override this shoot through protection. By setting the ILx to “high”, the IHx to “low” and MFP to a level above 4.5V, all external Mos- fets will be turned on simultaneously to blow a well-dimensioned fuse. The application will be finally disconnected in this way from battery, and thus guarantee that the motor does not ap- ply any uncontrolled torque. Undervoltage warning: If the voltage of a bootstrap capacitor CBxx reaches the undervoltage warning level the error flag is set and will remain set until the voltage of the bootstrap capacitor has recovered. The error signal can be seen as awarning that an undervoltage shut-down could occur soon, and the user can take appropriate measures to avoid this. Such measures could be the change of the duty cycle to a range of 10-90% or the ramp down of the motor. Undervoltage shut down: The TLE6280GP has an integrated undervoltage shut-down, to guarantee that the behavior of the device is predictable in all voltage ranges. If the voltage of a bootstrap capacitor CBxx reaches the undervoltage shut-down level, the Gate-Source voltage of the affected external Mosfet will be actively pulled to low. In this situation the short circuit detection of this output stage is deactivated to avoid a complete shut down of the driver. This allows continued operation of the motor in case of undervoltage shut-down for a short period of time. 7 2004-03-31 |
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