SLVSE89C August 2017 – June 2020 DRV10987
The DRV10987 device is available in either a sleep mode (DRV10987D) or standby mode version (DRV10987S). The DRV10987 device enters either sleep or standby to conserve energy. When the device enters either sleep or standby, the device stops driving the motor. The step-down regulator is disabled in the sleep mode version to conserve more energy. The I2C interface is disabled and any register data not stored in EEPROM is reset for the sleep mode version. The switching regulator remains active in the standby mode version. The register data is maintained, and the I2C interface remains active for standby mode version.
For different speed command modes, Table 1 shows the timing and command to enter the sleep or standby condition.
|SPEED COMMAND MODE||ENTER STANDBY CONDITION||ENTER SLEEP CONDITION||EXIT FROM STANDBY CONDITION||EXIT FROM SLEEP CONDITION|
|Analog||SPEED pin voltage < VEN_SB for tEN_SB_ANA||SPEED pin voltage < VEN_SL for tEN_SL_ANA||SPEED pin voltage > VEX_SB for tEX_ SB_ANA||SPEED pin voltage > VEX_SL for tEX_SL_ANA|
|PWM||SPEED pin low (V < VDIG_IL) for tEN_SB_PWM||SPEED pin low (V < VDIG_IL) for tEN_SL_PWM||SPEED pin high (V > VDIG_IH) for tEX_SB_PWM||SPEED pin high (V > VDIG_IH) for tEX_SL_PWM(1)|
|I2C||SpdCtrl[8:0] is programmed as 0 for tEN_SB_PWM||See Required Sequence to Enter Sleep Mode(2)||SpdCtrl[8:0] is programmed as non-zero for tEX_SB_PWM||SPEED pin high (V > VDIG_IH) for tEX_SL_PWM (PWM mode) or SPEED pin voltage > VEX_SL for tEX_SL_ANA (Analog mode)|
Note that when using the analog speed command, a higher voltage is required to exit from the sleep condition than from the standby condition. The I2C speed command cannot take the device out of the sleep condition because I2C communication is disabled during the sleep condition.
|INPUT PWM FREQUENCY (kHz)||PWM DUTY CYCLE (%)|
|0.1 to 0.5||14|
|0.5 to 1||11|
|1 to 50||9|
|50 to 100||4|