FantomXR

STP16 as alternative to HC595?

12 posts in this topic

Hey people,

a friend of mine just told me about the STP16CPC. It looks great. It can be accessed via SPI, it has 16 outputs and a current-setting. So if one would like to build LED-Rings this looks like a great solution with very less parts-count. You wouldn't need any current-limiting resistors in front of the LEDs and only one IC to drive 16 LEDs.
So, does anyone used this IC before and does it work in a classic DIO-chain without changes on the code?

I took a look into the datasheet but I'm not sure. The STP has a LE-input which the HC595 doesn't have. But it might work if one connect the chipselect (RC) which is normally connected to RCLK on the HC595 to the LE of the STP. 

Thanks,
Chris

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Interesting

wonder if 90mA for 16 led is enough for all application.

I suppose code need adaptation to consider it as two DOUT for shift register update

Best

Zam

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I found datasheet unclear.

absolute max rating say 90mA for Iout  (1 or 16 ?)

But max Ignd is 1.6A, look that the device can sink more than 90mAx16out, which tend to say you'r right

Best

Zam

 

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Looks like a nice chip, worth a try! Pinout is much better than a 595.

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Yes it's a good chip, I already used it. I confirm it's 90mA for each output.
But It's a on/off output. In this range I prefer the TLC5947, it's a 24 outputs(better for RGB leds), chainable, with a 12bits PWM outputs. But it's not the same in code for sure it requires a specific driver.

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14 minutes ago, Antichambre said:

the TLC5947

interesting too, but honestly you can't find less DIY friendly device... thermal pad under body... you need a reflow to solder it :decayed:

I'm nor afraid of SMD but this is a no go, like QFN (eventually ?) or BGA

Best

Zam

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4 minutes ago, Zam said:

you need a reflow to solder it

Hot air station is enough.

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1 minute ago, Antichambre said:

Hot air station is enough.

If you say it I trust you :cheers:

Best

Zam

ps: "extended side question" is it possible to solder QFN with hot air ?

my deeper skill is SOIC with larger tip as possible (true !! it work better)

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3 minutes ago, Zam said:

ps: "extended side question" is it possible to solder QFN with hot air ?

Yes I soldered the TLC5958 (VQFN56) for the OLRE16 like that.

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4 minutes ago, Antichambre said:

Yes I soldered the TLC5958 (VQFN56) for the OLRE16 like that.

OK :happy:

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Of course there are tons of other ICs, that are very usable but are not supported by MIDIbox though a dedicated driver is needed.

I thought that the STP may can be used with very little changes in the firmware but giving a great benefit. TLC5958 is a complete other story I think. 

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