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Part Number: DRV8837
hi ,Sir/ woman :
I use the DRV8837 as the two phase motor drive Chip , we have some power issue on motor start , So do we have some similar chip which have the softe-start funiction, thanks !
Most motor drive devices get the driving PWM signal or two phase switch input from MCU. So, the soft-start is controlled by MCU.
So far, I don't see any soft-start function device.
Motor Drive Solutions
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In reply to Wang5577:
Thanks for your kindly reply , yes , most motor chips have the PWM signal control,but from the datasheet of the DRV8837 ,there just a litter content of the PWM , Do TI have the two phase motor drive chip which have the detail introduction of the PWM control ,could you recommend some ?
In reply to jianfeng qin:
BTW, we do have a couple of devices that have soft start built in for single phase DC motor. The DRV8832 (Hardware I/F) and DRV8830 (I2C) slowly ramp the motor to the desired speed without the need of a PWM input. For example: DRV8832's duty cycle slowly ramps up to the commanded voltage. This can take up to 12 ms to go from sleep to 100% duty cycle. Because of this, highspeed PWM signals cannot be applied to the IN1 and IN2 pins.
But, since we talk about two phase motor, I am not sure what "soft-start" do you mean?
a. the winding current soft-start to setting value
b. the motor speed soft-start to setting speed
Would you send me your 2 phase motor spec?
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