SM72295: does SM72295 support buck-boost topology

Hello Sean,

Thank you for your interest in the SM72295. The SM72295 is a dual high side low side half bridge, or full bridge gate driver. The high side floating power supply is configured to be a boot strap, which is charged when the switch node transitions to ground in a typical half bridge configuration.
With a buck-boost, the typical configuration I see is the inductor between the high side FET source and low side drain. In the boost configuration the high side device can be on in a DC state.
The 1st concern I would see, if you need the high side to be on as a DC switch, is maintaining the high side bias.

Can you send a schematic of your design, to confirm the switch configuration?
The dead time appears to be controlled by the inputs to each driver, there is no dead time control logic internal to the driver.

Regards,
Richard Herring

Richard,

 

Thanks your comment. Customer wants TI can provide reference design schematic for buck-boost to confirm it is workable.

Could you please check if TI has a reference schematic for buck-boost? It is for OMM customer, the reference schematic is helpful to convince customer to choose SM72295 as solution.

By the way, how can customer to get source code of MCU for TIDA-00120?

Best Regards

Sean Zhang