FantomXR Posted June 22, 2019 Report Share Posted June 22, 2019 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 Quote Link to comment Share on other sites More sharing options...
Zam Posted June 22, 2019 Report Share Posted June 22, 2019 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 Quote Link to comment Share on other sites More sharing options...
FantomXR Posted June 22, 2019 Author Report Share Posted June 22, 2019 Isn't it 5-90mA per channel? Quote Link to comment Share on other sites More sharing options...
Zam Posted June 22, 2019 Report Share Posted June 22, 2019 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 Quote Link to comment Share on other sites More sharing options...
latigid on Posted June 22, 2019 Report Share Posted June 22, 2019 Looks like a nice chip, worth a try! Pinout is much better than a 595. Quote Link to comment Share on other sites More sharing options...
Antichambre Posted June 22, 2019 Report Share Posted June 22, 2019 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. Quote Link to comment Share on other sites More sharing options...
Zam Posted June 22, 2019 Report Share Posted June 22, 2019 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 I'm nor afraid of SMD but this is a no go, like QFN (eventually ?) or BGA Best Zam Quote Link to comment Share on other sites More sharing options...
Antichambre Posted June 22, 2019 Report Share Posted June 22, 2019 4 minutes ago, Zam said: you need a reflow to solder it Hot air station is enough. Quote Link to comment Share on other sites More sharing options...
Zam Posted June 22, 2019 Report Share Posted June 22, 2019 1 minute ago, Antichambre said: Hot air station is enough. If you say it I trust you 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) Quote Link to comment Share on other sites More sharing options...
Antichambre Posted June 22, 2019 Report Share Posted June 22, 2019 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. Quote Link to comment Share on other sites More sharing options...
Zam Posted June 23, 2019 Report Share Posted June 23, 2019 4 minutes ago, Antichambre said: Yes I soldered the TLC5958 (VQFN56) for the OLRE16 like that. OK Quote Link to comment Share on other sites More sharing options...
FantomXR Posted June 23, 2019 Author Report Share Posted June 23, 2019 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. Quote Link to comment Share on other sites More sharing options...
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