SLVSD29 October 2015 DRV8704
PRODUCTION DATA.
In direct PWM input mode, the AIN1, AIN2, BIN1, and BIN2 directly control the state of the output drivers. This allows for driving up to two brushed DC motors. Table 1 shows the logic.
SLEEPn | xIN1 | xIN2 | xOUT1 | xOUT2 | DESCRIPTION |
---|---|---|---|---|---|
0 | X | X | Hi-Z | Hi-Z | Sleep mode; H-bridge disabled Hi-Z |
1 | 0 | 0 | Hi-Z | Hi-Z | Coast; H-bridge disabled Hi-Z |
1 | 0 | 1 | L | H | Reverse (current xOUT2 → xOUT1) |
1 | 1 | 0 | H | L | Forward (current xOUT1 → xOUT2) |
1 | 1 | 1 | L | L | Brake; low-side slow decay |
In direct PWM mode, the current control circuitry is still active. The full-scale VREF is set to 2.75 V. The TORQUE register may be used to scale this value, and the ISEN sense amplifier gain may still be set using the ISGAIN bits of the CTRL register.