What is the best current sensor IC for measuring a voltage source (30 V) and 6 A max

[An_RF_Newbie]

I need the smallest current sensor IC (because I don't have much space on my PCB) that has these specifications:

1. Has good isolation (more than 500 V)
2. Works with 3.3 V
3. Measures currents up to 6 A.

I will be grateful if you could introduce me to some ICs that you worked with.

 

[KlausST]

Hi,

"Best" is meaningless without saying in which regard.

Missing informatins:

DC? AC? Frequency / waveform?
Accuracy?
Precision?
Interface?
PCB mount? SMD/THM?
Area limit, size limit?
Price limit?
Volume?

My first idea: "hall current sensor IC". Just do a search at your distributor.

Klaus

 

[BigBoss]

0 to 50 A Integrated Current Sensor ICs | Allegro MicroSystems

Our family of fully integrated, high isolation current sensor solutions provides accurate measurement with very low resistance—all without the need for external isolation components.

www.allegromicro.com

 

[danadakk]

Just go here and set filters to narrow down slection :

https://www.digikey.com/en/products/filter/current-sensors/525?s=N4IgTCBcDaIMYFcBOSCmA7ALgAgM4dwHskQBdAXyA

Regards, Dana.

 

[stenzer]

As Klaus mentioned, it depends on a couple of design constrains. E.g. a single IC solution is offered by Crocus Technology [1].

[1] https://crocus-technology.com/wp-content/uploads/2022/03/CT110-Data-Sheet-Rev2.6.pdf

BR

 

[An_RF_Newbie]

I appreciate your kind comments and explanations. Here is my demands:

Signal: DC signal, Sampling rate: each 10mS, current step:200mA is enough, Interface: better to be an analog output voltage for ADC, SMD is more appropriate, less than 1*1 cm*cm, Price is not important

 

[FvM]

Check Allegro Hall sensors, e.g. ACS722.

 

[crutschow]

From where to where do you need 500V isolation?