Status of DRV8832 ?

Hi Eddie,

This part is not coming, it has arrived! As far as I know it should be orderable, so I will check on why it is not available through distribution yet. Thanks for bringing this up!

Best regards,

Jose Quinones

Hi Jose,

Parrallel post mentioned that 8832 has a lower current parallel. My peak current is less than 200mA, meant to drive a 3V bi-directional dc brushless motor.

 Do you recommend alternatives?

I would like to be linked to sources to purchase samples. Could you link me up?

johnathan.wang@nus.edu.sg

BR

Hi Jonathan,

I am now slightly confused. Could you possibly be referring to the DRV8432? Or maybe even the DRV8332? Because there is no parallel mode on the DRV8832. In fact, these three devices are considerably different devices, so before moving on, could you clarify which one of the three are you looking at? Here is what I mean:

DRV8832 is a low voltage single H Bridge with internal voltage control loop designed for toy applications from 3V to 7V. It regulates voltage internally so as the battery voltage is drained, the output voltage remains, as long as the output voltage is smaller than the input voltage, of course. It is like a buck converter where the motor is the inductor. It will not do BLDC motors, but you mention brushless, so this is one of the sources of confusion at the moment. Did you mean brushed DC motor by any chance?

DRV8432 is a high voltage (up to 52V) very high current (up to 24A when bridged in parallel) dual H Bridge integrated driver. It is just the power stage, though, so you would need to add all the circuitry to regulate the current and PWM the inputs accordingly. This device is recommended to be used with a powerful, butr economical, DSP such as the C2000, although any other microcontroller could be used as well. I don't think you can do BLDC motors with this device either. You can do PMSM, but not BLDC as there is no way to tri state the half H Bridges independently. If you want to drive a BLDC, then there is the DRV8332, which is like the DRV8432 but it has 3 half H Bridges instead of 4. It also has the independent tri state control, so it is intended to driving BLDC. You could drive PMSM as well with it.

Could it be that you meant DRV8332 since the beginning?

Hope the info helps. Best regards,

Jose Quinones

Hi Jose,

Good morning!

Indeed I am referring to the 8832 chip. I would like to drive the 3V motor in both directions. I understand there are 2 inputs, when either one is high, it will drive in two different directions.

Am I correct?

Hi Jonathan,

You are correct if the motor is BRUSHED. You specified BRUSHLESS so I must make the distinction. With Brushless, it will not work.

Now, if it is a BRUSHED DC motor, then you are correct. When the IN1 pin is HI and the IN2 pin is LO, the motor moves in one direction and then when IN1=LO, IN2=HI, the motor moves in the opposing direction. If both inputs are the same (both HI or both LO) the device is disabled.

This device is perfect for driving a 3V DC motor!

Best regards,

Jose Quinones

Hi Jose,

Appreciate the time to clarify and affirm my choice.

Need your expertise to connect me to the sales representative or relevant channels.

Cheers

 I too am (remain) curious if this part has become available.

Digi-Key shows zero stock, Mouser shows Ship Date 8/15/2011.  I ordered samples via TI about a month ago, at which time the Stock Status was 'Back Ordered: 23 Apr 2011'.  They didn't arrive.  I just checked and the Status is now 'Back Ordered: 19 May 2011'.

I pulled the plug on the DRV8832 a few weeks ago and went with a BD6211 instead.    I haven't gone to layout yet, so if the DRV8832 magically appears, I would still try to squeeze it in... the speed regulation and overcurrent fault are nifty features.

Thanks Jose, info does help.   No big problem in the larger scheme of things.

Ed