Thanks, no hurry. I'm just saying that should be in the datasheet. I can proceed without knowing Twake exactly, its a small part of the power budget, I'll just fudge it.
The breakout board page is at: www.pololu.com/.../2135
An image of the schematic is at: a.pololu-files.com/.../0J4059.600.png
There was a discussion of what the circuitry does in some forum on the net (Stack Overflow?), I can find it if you need it.
Polulu is selling this as a dual DC motor driver, but they could sell it as a stepper motor driver.
They have another breakout board for the DRV8834 which they are selling as a stepper driver. It has a higher level interface and is not low power (600nA) sleeping. I guess that's why I earlier chose the DRV8835.
If you have any references to application notes or reference designs?
BTW, your TI store sells a breakout board for $50. Polulu is much cheaper ($8). TI probably provides more support.
I'm programming using MSP430 Launchpad and Energia. I intend to share the library. Its interesting that the existing Arduino/Wiring 'Stepper' library might drive this chip through braking between some steps, and coasting between other steps, for say a few uS. I haven't sorted that out yet.
The application is surely on the margins. What ultra low power system needs mechanical action of a stepper?
I'm rambling in case anyone else is interested.
The breakout board page is at: www.pololu.com/.../2135
An image of the schematic is at: a.pololu-files.com/.../0J4059.600.png
There was a discussion of what the circuitry does in some forum on the net (Stack Overflow?), I can find it if you need it.
Polulu is selling this as a dual DC motor driver, but they could sell it as a stepper motor driver.
They have another breakout board for the DRV8834 which they are selling as a stepper driver. It has a higher level interface and is not low power (600nA) sleeping. I guess that's why I earlier chose the DRV8835.
If you have any references to application notes or reference designs?
BTW, your TI store sells a breakout board for $50. Polulu is much cheaper ($8). TI probably provides more support.
I'm programming using MSP430 Launchpad and Energia. I intend to share the library. Its interesting that the existing Arduino/Wiring 'Stepper' library might drive this chip through braking between some steps, and coasting between other steps, for say a few uS. I haven't sorted that out yet.
The application is surely on the margins. What ultra low power system needs mechanical action of a stepper?
I'm rambling in case anyone else is interested.