TPS62932: inductor Calculation

Ray Wang

Prodigy 40 points

Part Number: TPS62932

Tool/software:

V(IN_MAX)=12V, f_sw=500KHz,I(OUT_MAX)=2A,V_OUT=6V,K=0.4=(∆I_L)/I_(OUT_MAX)

I calculated the inductor base on above condition.

Why in webench showing 12 uH? But I calculate using formula it coming 8.2 uH?

Additional question, If the load current is 0.5A, Should I use 2A rated current or 0.5A load current in formula to calculate?Should I use 2A rated current or 0.5A load current in webench input?

4 months ago

+1 Gui He 4 months ago

TI__Mastermind 26526 points

Hi Ray

The 0.2~0.4 K value is ok.

If the load current is 0.5A, Should I use 2A rated current or 0.5A load current in formula to calculate?Should I use 2A rated current or 0.5A load current in webench input? --- Please also use 2A in the calculate formula, for webench , you can input 0.5A/2A, the recommended L is same.

Thanks and best regards.