Part Number:DRV10987
Hi,
I am having trouble with the standalone chips. Before integrating into a circuit, I want to check I can communicate with them on the I2C bus/generally make them work from the non-TI controller I am using with the standard I2C libraries.
Unfortunately, I hit a roadblock before that - there is no activity on the SW pin, so no 5V so no 3.3V... There is however 1.8V showing on the 1.8V pin. I am powering the device from a 9V source; i.e. above the threshold voltages, but quite low to avoid damaging anything when I start plugging the motor into it later. I have checked there is actually 9V going into it.
I soldered it myself, and have checked all the pins have continuity and no cross continuity... done two parts, and both show the same behaviour. The switching inductor and capacitor are 47uH and 10uF. All the other 3.3 and 1.8V caps are 100nF, so not quite the values for of 1uF, but I'm not expecting that to be the problem on what I assume is a linear regulator... What am I doing wrong???
I was wondering if I needed to write some registers to start it, but it's not showing up on an I2C bus scanner so I'm kinda stuck!
I have the S (standby) variant, not the D (sleep) variant. Any help appreciated!
