TPS61071: VOUT accuracy

Hironori Yoshimura

Part Number: TPS61071

My customer designed attached schematic file based on datasheet parameter P12 formula.

But output voltage shows slightly different against VOUT cal formula.

R1=R2×(Vo/VFB －１) //VFB=500mv

Would you please adivse how to adjust or how much we expect the output variance?

0 Jasper Li over 5 years ago

Hi Hironori,

the equation is OK. what is the target voltage and what is the voltage customer observe currently.

0 Hironori Yoshimura over 5 years ago in reply to Jasper Li

Customer mention a bit higher output voltage than calculation formula during light road condition.

Do you know reason why and need to show how much expected variance of output voltage?

0 Jasper Li over 5 years ago in reply to Hironori Yoshimura

could you share the measure data? normally the output voltage changes a little bit over output current.

also try to remove the feed-forward capacitor and check the output voltage again.

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