ABB AO845 Analog Output Module

ABB AO845 Analog Output Module

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The following chapter describes the board´s operation in the evaluation setup. Please note that the following paragraphs describe the circuits of the 2ED100E12-F2 which has been modified compared to the last revision of this AN to drive IGBT4 modules and to reduce the susceptibility to erroneous triggering of the Vcesat-detection. The same changes also are applied to the 6ED100E12-12-F2, but layout and part list of this board as provided in chapter 7 still represent the initial design. 

The 2ED100E12-F2 and the 6ED100E12-F2 have an integrated DC/DC converter for each leg, which generates the required secondary isolated unsymmetrical supply voltage of +16 V / -8 V. High and Low side driver voltages are independently generated by using one unipolar input voltage of 15 V. Additionally, the power supply is protected against gate – emitter short circuit of the IGBTs. In case of DC/DC converter overload, the output voltage drops. The Under Voltage Lock Out function ensures gate driver operation only to take place within specified IC supply voltages range. The fault is reported to the driver’s primary side.

ABB AO845 Technical drawing:

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