LM3671-evaluation board: configuration & BOM

Jason Kang

Intellectual 470 points

Other Parts Discussed in Thread: LM3671

Hi.

I am planning to use "LM3671" to supply "1.2V / 600 mA max power" on my product.

I will evaluate LM3671 with "AN-1395 LM3671 Evaluation Board".

I guess I need to place R1, R2, C1, C2 to configure the right output voltage of 1.2V.

By the way, it is not clear to me if L (2.2 uH), Cin (4.7 uF), Cout (10 uF) are already placed on the evaluation board according to the User's guide (AN-1395).

Are these components already there? Or do I need to order these parts separately?

Thank you in advance.

over 11 years ago

0 Kern Wong over 11 years ago

TI__Intellectual 1955 points

Hi Jason,

The EVB should be populated with all external support components. If that was not setup for 1.2V output, then you will need to change R1 and R2 to get your target voltage; you may not need to alter C1, C2, check DS for suggested values. Note that in customer application board, PCB parasitics might influence the value of C1 and or C2, optimize it as needed. Regards,

Kern

0 Jason Kang over 11 years ago in reply to Kern Wong

Intellectual 470 points

I see.

Thank you for your support.

0 Kern Wong over 11 years ago in reply to Kern Wong

TI__Intellectual 1955 points

Jason,

Someone notes the AN BOM section it calls out C1 and C2 as Cin and Cout, while C3 and C4 are the caps across the Rfeedback. Hope this will clarify for you and users. Kern

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LM3671-evaluation board: configuration & BOM