SLIS175 November 2016 DRV8872-Q1
The DRV8872-Q1 output consists of four N-channel MOSFETs that are designed to drive high current. These MOSFETs are controlled by the two logic inputs IN1 and IN2, according to Table 1.
|0||0||High-Z||High-Z||Coast; H-bridge disabled to High-Z (sleep entered after 1 ms)|
|0||1||L||H||Reverse (current OUT2 → OUT1)|
|1||0||H||L||Forward (current OUT1 → OUT2)|
|1||1||L||L||Brake; low-side slow decay|
The inputs can be set to static voltages for 100% duty-cycle drive, or they can be pulse-width modulated (PWM) for variable motor speed. When using PWM, switching between driving and braking typically works best. For example, to drive a motor forward with 50% of its max RPM, IN1 = 1 and IN2 = 0 during the driving period, and IN1 = 1 and IN2 = 1 during the other period. Alternatively, the coast mode (IN1 = 0, IN2 = 0) for fast current decay is also available. The input pins can be powered before VM is applied.