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UC1875-SP: Figure 1 page 5 duty factor (DF)

Part Number: UC1875-SP

I had a question about the below diagram that is part of the UC1875-SP spec.  (Figure 1 page 5)

The diagram shows duty factor (DF) to be t/T.  This would always be 50% for all F.  The actual DF = tx/T, where tx covers the same time duration covered by F in the above diagram.  The effective PWM frequency is 2/T for full bridge operation.

 

Is my statement correct?