Just to update you. We realize the DC motor is just too demanding for the DRV8850. There is no driver IC available that we could find, that can handle such high current at low voltage. We had to build a custom driver for this product. Even a high current…
Part Number: DRV8850 We are trying to smooth out our motor voltage as much as possible. Its a small battery powered system, so the PWM is mirrored in the battery voltage drop. This can cause problems. So our goal is to increase the PWM frequency and increase…
Part Number: DRV8850 We are developing a new motor design with the DRV8850. Its a great chip, but we've had some unexplained failures. For no apparent reason, the driver will stop functioning. It then goes into a high current draw at idle. From 0.3 -…
Part Number: DRV8850 Hi,
I'm using a DRV8850 to drive a very small DC motor on 3.7V battery,
The Vpropi pin is connected to a 4.3kOhm resistor and voltage is measured by the MCU's ADC.
On empty load the motor use about 15mA.
Some boards are able…
Part Number: DRV8850 I want to reduce LDO current as low as possible for my application.
I found the biggest power consumption from resistor divider.
for example :R1=4.7K, R2=2K, Vout=2.68 then we have at leat 400uA(2.68V/6.7K) + 40uA(LDO enabled)
I can…
Part Number: DRV8850
Hi Team,
My customer use DRV8850, below is the SCH,
VadjG = 3V TEC-EN-G = 5V TEC-IN1-G=5V TEC-IN2-G = 0.9V But there's no output in OUT2-G & OUT1-G, voltage are both about 0.02V.
What might be the problem?
Part Number: DRV8850 Other Parts Discussed in Thread: DRV8873 We are using DRV8850 motor driver in our project. We are measuring current flowing through the motor, using VPROPI output. Schematics attached below. VMTR is 5.5V. The motor is connected to…
Hi Jitendra,
We have not heard from you in some time, and are assuming your issue has been resolved. If it has not, please reply to this thread or if the thread is locked please select "Ask a related question" at the top right of the screen.…
Part Number: DRV8850 Hello,
I'd like to use half-bridges in the DRV8850 in parallel (OUT1 and OUT2 connected together), and connect the motor between this combined output and ground. I expect that I can drive the motor with more current that way. …
Hi Wang Li,
Thank you for your inputs this is much appreciated, the post is for DRV8825 . I overlooked that DRV8850 is also tagged and it is my mistake.
Regards,
-Renan
