LM2674: LM2674 : stability model

lioni William

Part Number: LM2674

Hello,

I got 2 question on LM2674 :

-The current limit is a peak current, rms current or average current ? If the ripple current is big the protection current can actived ? For example Io= 500mA and ripple current =1Apk_pk at 12V?

- Have you a model for test the stability of the LM2674 ( on LTSPICE or other simulator free)?

Best regard,

William LIONI.

over 5 years ago

0 Andy Chen over 5 years ago

TI__Mastermind 34575 points

Hi Lioni,

The control circuit monitor the high-side current peak value at each switching cycle, it's not RMS or average current,

The maximum current peak is about 800mA, so for 500mA load current, you need to select proper inductor value to make the inductor current ripple peak is below 800mA.

LM2674 application circuit can be simulated in free Webench on TI.com, you can check loop stability by modify the Cout and inductor per your application.

B R

Andy