#buckconverter — Public Fediverse posts

Well, this is annoying.

I have some little power #modules (bought on #AliExpress, natch) that were advertised as automatic boost/buck converters. Input from <4V to >30V, output from 1.25V to 35V.

They're based on the XL6009 switching converter, which supports auto-buck-boost as one mode.

But they appear to use it in boost-only mode. The output voltage can not go below the input as far as I can tell. From the datasheet, it looks like that's because the auto-buck-boost config requires a few more components, plus a transformer instead of a simple inductor, which is probably the main reason (BOM).

The listing just seems to be ... wrong.

Annoying.

#seller #SellerDescription #YumCha #Chinesium #BuckConverter #BoostConverter #AutoBuckBoost #BuckBoost #electronics #hobby

Well, this is annoying.

I have some little power #modules (bought on #AliExpress, natch) that were advertised as automatic boost/buck converters. Input from <4V to >30V, output from 1.25V to 35V.

They're based on the XL6009 switching converter, which supports auto-buck-boost as one mode.

But they appear to use it in boost-only mode. The output voltage can not go below the input as far as I can tell. From the datasheet, it looks like that's because the auto-buck-boost config requires a few more components, plus a transformer instead of a simple inductor, which is probably the main reason (BOM).

The listing just seems to be ... wrong.

Annoying.

#seller #SellerDescription #YumCha #Chinesium #BuckConverter #BoostConverter #AutoBuckBoost #BuckBoost #electronics #hobby

Well, this is annoying.

I have some little power #modules (bought on #AliExpress, natch) that were advertised as automatic boost/buck converters. Input from <4V to >30V, output from 1.25V to 35V.

They're based on the XL6009 switching converter, which supports auto-buck-boost as one mode.

But they appear to use it in boost-only mode. The output voltage can not go below the input as far as I can tell. From the datasheet, it looks like that's because the auto-buck-boost config requires a few more components, plus a transformer instead of a simple inductor, which is probably the main reason (BOM).

The listing just seems to be ... wrong.

Annoying.

#seller #SellerDescription #YumCha #Chinesium #BuckConverter #BoostConverter #AutoBuckBoost #BuckBoost #electronics #hobby

Well, this is annoying.

I have some little power #modules (bought on #AliExpress, natch) that were advertised as automatic boost/buck converters. Input from <4V to >30V, output from 1.25V to 35V.

They're based on the XL6009 switching converter, which supports auto-buck-boost as one mode.

But they appear to use it in boost-only mode. The output voltage can not go below the input as far as I can tell. From the datasheet, it looks like that's because the auto-buck-boost config requires a few more components, plus a transformer instead of a simple inductor, which is probably the main reason (BOM).

The listing just seems to be ... wrong.

Annoying.

#seller #SellerDescription #YumCha #Chinesium #BuckConverter #BoostConverter #AutoBuckBoost #BuckBoost #electronics #hobby

Well, this is annoying.

I have some little power #modules (bought on #AliExpress, natch) that were advertised as automatic boost/buck converters. Input from <4V to >30V, output from 1.25V to 35V.

They're based on the XL6009 switching converter, which supports auto-buck-boost as one mode.

But they appear to use it in boost-only mode. The output voltage can not go below the input as far as I can tell. From the datasheet, it looks like that's because the auto-buck-boost config requires a few more components, plus a transformer instead of a simple inductor, which is probably the main reason (BOM).

The listing just seems to be ... wrong.

Annoying.

#seller #SellerDescription #YumCha #Chinesium #BuckConverter #BoostConverter #AutoBuckBoost #BuckBoost #electronics #hobby

Coping with Disappearing Capacitance in a Buck Converter https://hackaday.com/2025/08/10/coping-with-disappearing-capacitance-in-a-buck-converter/ #ceramiccapacitor #analogdiscovery #buckconverter #dielectric #capacitor #hardware #ceramic #Parts

Coping with Disappearing Capacitance in a Buck Converter - Designing a circuit is a lot easier on paper, where components have well-defined ... - https://hackaday.com/2025/08/10/coping-with-disappearing-capacitance-in-a-buck-converter/ #ceramiccapacitor #analogdiscovery #buckconverter #dielectric #capacitor #hardware #ceramic #parts

The BAPPR Keeps Your Addressable LED System Cool https://hackaday.com/2024/07/27/the-bappr-keeps-your-addressable-led-system-cool/ #switchingpowersupply #addressableleds #buckconverter #Neopixels #hardware #LEDHacks #ledstrip #rgb

The BAPPR Keeps Your Addressable LED System Cool - We all love a nice strip or grid of addressable LEDs. It can add flair or an artis... - https://hackaday.com/2024/07/27/the-bappr-keeps-your-addressable-led-system-cool/ #switchingpowersupply #addressableleds #buckconverter #neopixels #hardware #ledhacks #ledstrip #rgb

Minimizing Stress on a Coin Cell Battery - When it comes to powering tiny devices for a long time, coin cell batteries are th... - https://hackaday.com/2023/08/10/minimizing-stress-on-a-coin-cell-battery/ #boostconverter #buckconverter #batteryhacks #switchmode #voltagesag #coincell #battery #dc-dc #life #smps

Op Amp Challenge: An Op-Amp Buck Regulator - Switching regulators have delivered such convenience and efficiency compared to th... - https://hackaday.com/2023/05/01/op-amp-challenge-an-op-amp-buck-regulator/ #opampchallenge #buckconverter #contests #hardware #op-amp #pwm

A Simple Soft Power Switch Using Common Modules - If you want to easily control the power in a circuit, you’ll probably reach for the classic toggle... more: https://hackaday.com/2020/07/21/a-simple-soft-power-switch-using-common-modules/ #buckconverter #lm2596 #ttp223 #parts #dc-dc