TPS61043: VIN's I(Q) while switching

Jeffrey Summit

Part Number: TPS61043

I am looking for guidance on VIN's quiescent current while switching.

I have a 2 NiMH battery pack, driving 3 LEDs at 1mA. When the batteries near full discharge their ESR causes a large ripple (500mV) which causes an early UVLO trigger.

over 3 years ago

0 Yuting Shao over 3 years ago

TI__Genius 13001 points

Hi Jeffrey,

Let me have a check and reply you later. BTW, TPS61043 is used for what application?

Robin

0 Jeffrey Summit over 3 years ago in reply to Yuting Shao

Prodigy 20 points

This is a outdoor path lighting application

0 Yuting Shao over 3 years ago in reply to Jeffrey Summit

TI__Genius 13001 points

Hi Jeffrey,

Sorry for that I don't find any database about TPS61043 quiescent current when switching. I think it's much smaller than 1mA, so the VIN ripple mainly caused by inductor current. Please try with larger inductor to decrease inductor current ripple.

Robin

0 Yuting Shao over 3 years ago in reply to Jeffrey Summit

TI__Genius 13001 points

Hi Jeffrey,

I'm interested in your design. Could you share the similar product introduction link with me? Thanks a lot in advance!

Robin

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TPS61043: VIN's I(Q) while switching