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MSP430FR5043: Drive a 300Khz Ultrasonic Tranducor. How to set up Ultrasonic Sensing Design Center parameters?

Part Number: MSP430FR5043

We have driven the 200Khz utlrasonic truanducor by MSP430FR5043 and made the product for sales. 200Khz utlrasonic truanducor is OK now.

But the 200Khz utlrasonic truanducor size is too big. So we want to change to  a smaller size 300Khz utlrasonic truanducor.

After we try dozens of parameter combinations on Ultrasonic Sensing Design Center. We can not make dirve the 300Khz utlrasonic truanducor successfully. The max flow is very low. 

Could you help give a 300Khz utlrasonic truanducor parameter on  Ultrasonic Sensing Design Center that have been verified?

Thanks a lot!

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