DC/DC Buck(Step-down) Converter Controlled by using Arduino

Using Arduino Project Guidance
#1

Hi community,

I'm searching for control the voltage

I just controlling the LRA(Linear resonance Actuator, just Vibration Motor)

To make vibration performance better, It is important to make a voltage controller.

I saw some web page about this issue.

https://www.fischl.de/dcdccontrol/

Hardware components:
LM2596
arduino
DAC module

I will use to control LM2596 buck converter by using DAC Module.

but I heard some issue about the Poor current efficiency of DC/DC Converter.

Will it affect controlling the vibrating motor?

The maximum output current of LM2596 is 3A.

Thanks.

#2

OMG... I'm going to use lithium polymer 3.7V battery.
In LM2596 datasheet, the efficiency at that time is not even 70%.
What should I do?

#3

Why not use the DAC, then buffer the output, quite simple solution. I am assuming this is in the 5 to 12V range, the solution is the same but the cost goes up with the voltage.
Good Luck & Have Fun!
Gil

#4

The speed of a DC motor depends on the load, is not strictly proportional to the motor voltage or current.

Why don't you want to use the traditional PWM approach?

#5

I use power source Lithium polymer 3.7V battery.

is there a DAC module can control voltage level 5v to 12v?

#6

DrDiettrich,

I want to do it is to boost from 3.7V(anyway 5v) to 9V instantaneously.
Is there a way to amplify it by using a PWM?? I'm not sure..

#7

I read that the LM2596 is a step-down coverter, you need step-up to 9V. Select an adjustable step-up converter and we'll see how it can be controlled.

#8