RE: DRV8835: Question for logic input current in datasheet

Hi Rick,

Thank you for your support. The customer asks more detailed questions about the IIH condition because their circuit is unusual.

Configuration: SoC -> H-Bridge circuits (for control signals) -> DRV8835

So, the output from H-Bridge circuits is 5V(High) and 0V(Low) and it will be inputted to the AIN1/AIN2 pins of IN/IN mode of DRV8835. Also, the output current of H-Bridge is supported up to 200mA.


Question 1. Is it possible to use this configuration (output from H-Bridge) for the AIN1/2 input of DRV8835 when considering max. 50uA of IIH?

Question 2. We’re now confused about the meaning of 50uA, so can you let us know which one is correct in the following statements?
2-1 From current flow point of view,
a. External host is to give the specific current (fixed by external host) to AIN1/2 of DRV8835?
b. DRV8835 is to draw the specific current (required by AIN1/2) from external host?

2-2 a. AIN1/2 in DRV8835 need less than 50uA to drive motors?
: In this case, is there any limitation of min. current to make AIN1/AIN2 work normally?
b. AIN1/2 in DRV8835 need more than 50uA to drive motors?

Best Regards,
Sam Lee