DRV8910-Q1: OLD current

Oba said:

Low-current acitve OLD looks like supporting only L outpt. Can't it be used for H output?

This is correct.

Oba said:

The active OLD current is defined as 2~18mA(TYP 9mA). This is too big for their application.
Is there any way to reduce it?

Enabling low-current OLD will set the IOLD threshold for the low-side FET to 0.2 to 2mA (0.8 typical). Other than enabling this setting, there is not another way to reduce the IOLD threshold

Oba said:

2mA MAX of Low currect active OLD is good, but it looks like not supporting H output. 
They need to support both H and L outputs

loads which will only drive the high side FET cannot use the low-current OLD feature to change the IOLD threshold values. 

Oba said:

doesn't DRV8908 support passive OLD?

DRV8908 does support passive OLD. The steps to enable the passive OLD feature can be found in section 8.3.3.5.3 of the datasheet and Table 9 contains the passive OLD truth table.

Regards,

Joshua