74HC595 - driving higher loads/voltage

Using Arduino General Electronics
1

Hi,

I have successfully built a port multiplexer with 74HC595 with one led on each 8 pins. However, if I want to control f.ex. 12V Led stripes I cannot connect them directly to 595's pins. What would be the best solution for 8 ports? 8 transistors/Mosfets? Or is there some handy IC available for that?

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TPIC6B595

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What will be the maximum load current for each output to handle ?

1 Like
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Tpic6b595 can handle a max of 150mA per channel. At 12V that's equivalent to about 1.8W of power.

A 5M led strip is typically about 60W, but that can vary greatly depending on the type of LEDs used and how many leds per metre, so you must check the specs of the strip you want to use. But if we assume your 5M strip is 60W, then each output of the tpic chip can control a strip of about 150mm or 6".

If you need to control longer strips than that, I would recommend a logic-level, n-channel MOSFET such as IRLZ44 or STP16NF06L for each channel. You can use 74hc595 to control 8 channels.

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@kjkallela,
You asked this question on the end of someone else's question, which I split. Then I dug a bit deeper and found that you already asked the same thing here, so I deleted the split topic.

Please do not:

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Thank you.

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