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DRV2605L: Different motor configurations

user5883945
Expert 1946 points
Part Number: DRV2605L


Dears,

   Could you help to give some advice for motor configurations based on customer motor which they selected.

   vib-rated-mv=<3200>;

   vib-overdrive-mv=<3200>;

   mode=<DRV260X_LRA_MODE>;

   library-sel=<DRV260X_LIB_LRA>;

    whether these configurations are corrcet?

    

SLA0815B-01-SPEC-V6-通用版.pdf

  • 0
    TI__Mastermind 21195 points

    The Mode and Library-Sel parameters are correct.

    however the rated voltage in the datasheet is given as 1.2V for the LRA. why have you selected 3200 mV as the rated voltage?

    Regards,
    Arthur

  • 0 in reply to Arthur Brown
    Expert 1946 points

    Hi Arthur,

       Does the overdrive also need to be changed?

  • 0 in reply to user5883945
    TI__Mastermind 21195 points

    Yes, sometimes LRA datasheets will give the overdrive votlage. If they do not, then we reccomend that the Overdrive voltage be set to ~1.3xRated_Voltage

    Regards,
    Arthur

  • 0 in reply to Arthur Brown
    Prodigy 80 points

    We changed a LRA motor and then configured it according to the program shown above. Then we found that the waveform was distorted, are there other parameters that need to be modified？

  • 0 in reply to martin
    Expert 1946 points

    add setting file

    Fullscreen regsetting.txt Download 
        rated_voltage = drv260x_calculate_voltage(VIB_RATED_MV);
    overdrive_voltage = drv260x_calculate_voltage(VIB_OVERDRIVE_MV);
    
    drv2605L_reg_write_one_byte(DRV260X_RATED_VOLT,rated_voltage);
    drv2605L_reg_write_one_byte(DRV260X_OD_CLAMP_VOLT,overdrive_voltage);

    drv2605L_reg_write_one_byte(DRV260X_MODE,DRV260X_AUTO_CAL);
    drv2605L_reg_write_one_byte(DRV260X_CTRL3,DRV260X_NG_THRESH_2);
    drv2605L_reg_write_one_byte(DRV260X_FEEDBACK_CTRL,DRV260X_FB_REG_LRA_MODE |
		DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH );
    
   //calibration
    result_i2c = drv2605L_reg_write_one_byte(DRV260X_GO,DRV260X_GO_BIT);
    if(result_i2c != CY_SCB_I2C_SUCCESS)
    {
         Term_Printf("drv2605L(%d) write reg DRV260X_GO err\r\n",seq);
         goto drv2605L_err;   
    }

    do 
    {
         result_i2c = SCB3_I2C_Reg_Read(DRV2605L_I2C_ADDR,DRV260X_GO,&reg_data,1);
         if(result_i2c != CY_SCB_I2C_SUCCESS)
         {
             Term_Printf("drv2605L(%d) read reg DRV260X_GO err\r\n",seq);
             goto drv2605L_err;   
         }
    } while (reg_data == DRV260X_GO_BIT);

//set TRIGGER mode
drv2605L_reg_write_one_byte(DRV260X_MODE,DRV260X_EXT_TRIGGER_EDGE);





#define VIB_RATED_MV                    1800
#define VIB_OVERDRIVE_MV                1800


#define DRV260X_AUTO_CAL                0x07
#define DRV260X_NG_THRESH_2             (1 << 6)
#define DRV260X_FB_REG_LRA_MODE         (1 << 7)
#define DRV260X_BRAKE_FACTOR_4X		(3 << 4)
#define DRV260X_LOOP_GAIN_HIGH		(2 << 2)
#define DRV260X_GO_BIT                  0x01
#define DRV260X_RT_PLAYBACK             0x05
#define DRV260X_EXT_TRIGGER_EDGE	0x01


//DRV2605L reg list
#define DRV260X_STATUS                  0x0
#define DRV260X_MODE                    0x1
#define DRV260X_RT_PB_IN                0x2
#define DRV260X_LIB_SEL                 0x3
#define DRV260X_WV_SEQ_1                0x4
#define DRV260X_WV_SEQ_2                0x5
#define DRV260X_WV_SEQ_3                0x6
#define DRV260X_WV_SEQ_4                0x7
#define DRV260X_WV_SEQ_5                0x8
#define DRV260X_WV_SEQ_6                0x9
#define DRV260X_WV_SEQ_7                0xa
#define DRV260X_WV_SEQ_8                0xb
#define DRV260X_GO                      0xc
#define DRV260X_OVERDRIVE_OFF           0xd
#define DRV260X_SUSTAIN_P_OFF           0xe
#define DRV260X_SUSTAIN_N_OFF           0xf
#define DRV260X_BRAKE_OFF		0x10
#define DRV260X_A_TO_V_CTRL		0x11
#define DRV260X_A_TO_V_MIN_INPUT	0x12
#define DRV260X_A_TO_V_MAX_INPUT	0x13
#define DRV260X_A_TO_V_MIN_OUT          0x14
#define DRV260X_A_TO_V_MAX_OUT          0x15
#define DRV260X_RATED_VOLT		0x16
#define DRV260X_OD_CLAMP_VOLT           0x17
#define DRV260X_CAL_COMP		0x18
#define DRV260X_CAL_BACK_EMF            0x19
#define DRV260X_FEEDBACK_CTRL           0x1a
#define DRV260X_CTRL1			0x1b
#define DRV260X_CTRL2			0x1c
#define DRV260X_CTRL3			0x1d
#define DRV260X_CTRL4			0x1e
#define DRV260X_CTRL5			0x1f
#define DRV260X_LRA_LOOP_PERIOD         0x20
#define DRV260X_VBAT_MON		0x21
#define DRV260X_LRA_RES_PERIOD          0x22
#define DRV260X_MAX_REG			0x23

  • 0 in reply to martin
    TI__Mastermind 21195 points

    Hi Martin, 

    this is the correct waveform. if auto calibration is successfull then it is OK

    Regards,
    Arthur

  • 0 in reply to Arthur Brown
    Prodigy 80 points

    But why didn't I find this BEMF on another small size motor？

  • 0 in reply to martin
    TI__Mastermind 21195 points

    the BEMF is still in the waveform you attached. the BEMF is common mode between the outputs therefore will not appear when the waveform is taken as OUTP-OUTN

    Regards,
    Arthur