MiniBoost 5V @ 1A (TPS61023) Can it give 2A?

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IoTAll
 
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MiniBoost 5V @ 1A (TPS61023) Can it give 2A?

Post by IoTAll »

Hi!

I am using this breakout: Adafruit MiniBoost 5V @ 1A - TPS61023, PRODUCT ID: 4654, and I was wondering:

In the Adafruit breakout product description it is written:
- At 3.5V DC in, max current out at 5V is 1100 mA (this is a LiPoly nominal voltage)
- At 4V DC in, max current out at 5V is 1400 mA (3 NiMH, or a fresh LiPoly)

But looking at the datasheet of the TPS61023, I see this graph:
boost amp.jpg
boost amp.jpg (144 KiB) Viewed 52 times
I am a noob in this but I could understand that, even though the efficiency is not this great with a Vin between 3.5~4.2Vabove 1A, I could still get 2Amps at the 5V output.
As the breakout description is stating less, I was wondering.

I have a Lipo battery at the Vin of this breakout and my project is powered with 5V, drawing around 800mA constantly with short peaks at 2A.

If you can help me understand the lower available output current in the description VS in the datasheet, and if I could use this breakout in my project that would be awesome!

Thanks!

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dastels
 
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Re: MiniBoost 5V @ 1A (TPS61023) Can it give 2A?

Post by dastels »

That graph is for the chip itself, whereas the specs on the product page are for the complete circuit. Also the graph is for 5v output while the board is tuned for 5.2v output. You *might* be able to get short bursts of more current, but I wouldn't count on it, and it might overheat the boost.

Dave

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IoTAll
 
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Re: MiniBoost 5V @ 1A (TPS61023) Can it give 2A?

Post by IoTAll »

Ok clear, thanks a lot for the fast answer!!

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