1. DRV3201 Waveforms
7/2/2015

2. Boost Internal (from datasheet)

3. SW Pin
During ‘On’ stage, SW pin will switch at specified frequency until the BOOST pin good, then the pin stops switching. This repeats while boost is enabled. (The measured frequency on the bottom of the image is not correct)
BOOST SW

4. GNDLS_B
GNDLS_B only shows the current through the SW pin, not the full boost current (look at the boost diagram for details)
GNDLS_B

5. BOOST Pin
Below image shows AC coupled scope capture showing the ripple voltage on the BOOST pin. The SW pin is switching while the voltage is increasing and is not switching when the voltage is decreasing.
BOOST
Not Switching
Switching

6. Gate Drive VS = 16V, EVM is spinning a motor
Zoomed in of the HS turning off and the LS turning on
When HS FET is off, GHS = SHS, so VGS for the HS = 0V (FET is off). The HS Gate will follow the HS Source to keep the FET off
VGS ~10V : HS FET is on, motor output voltage is 12V
Both FETs are off, GHS = SHS
GLS1
GHS1
SHS1 (Motor Terminal)
LS FET is ON, HS is OFF (GHS = SHS). Motor output voltage is 0V