brushless motor driver with two current shunt amplifiers

MARK PESACH

Other Parts Discussed in Thread: BOOSTXL-DRV8301, DRV8301, DRV8308, DRV10983

Hi!

I am using the BOOSTXL-DRV8301 to drive bldc motor and measuring 2 phases currents. till now for evaluation it is great.

my problem is that the default configuration (amplifier gain for example) isnt good for me and i need an spi

to configure it every time.

so my first question - is there something similar but with fix (high) gain or the gain could be changed by external resistence? i dont want to use spi.

both solutions driver(with integrated FET) or predriver (like drv8301) works for me.

also if there any evaluation board that uses driver with external shunt amplifiers it can also be interesting .

i am working with currents < 1.6A and voltages < 12v

be grateful for advise

best regards

mark

over 9 years ago

0 Rick Duncan over 9 years ago

TI__Guru** 114905 points

Hi Mark,

Please take a look at the DRV10983 with integrated FETs and DRV8308 predriver. Both devices can be operated without mcu control.

EVMs are available for both devices.

0 MARK PESACH over 9 years ago in reply to Rick Duncan

Intellectual 850 points

Hi Rick

both solutions dont have 2 current amplifiers

0 Rick Duncan over 9 years ago in reply to MARK PESACH

TI__Guru** 114905 points

Hi Mark,

Correct, neither has external current amplifiers.

The DRV10983 monitors the current internally.

The DRV8308 has a speed control loop, adjusting the current automatically to maintain the proper speed. I failed to mention that although the DRV8308 can drive using 180 degree sinusoidal current control, hall sensors are required.

If you need current amplifiers for your application, you may have to place them externally to obtain the desired fixed gain and bypass the DRV8301 amplifiers.

0 MARK PESACH over 9 years ago in reply to Rick Duncan

Intellectual 850 points

i will check it

thanks

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brushless motor driver with two current shunt amplifiers