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Part Number: TLC5944
Hi, I'd like some input on how to read the supply current specs for the TLC5944 led driver.
Kenneth Du replied (in now locked thread):
Icc3/Icc4 is with LEDs all on of full greyscale while Icc1/Icc2 is without any LED's ON since BLANK is high.Rief changes the Reference Current in IC and will cause Typ/Max's cahnge. You can refer to the function block diagram.
- Icc3/Icc4, please clarify why the numbers are different as only the Riref resistor has changed (the numbers in the table I assume excludes the actual LED's)
- If we lower DCn (dot correction current register) to say half of the configured Riref, will this also lower the current consumption of the led-driver itself?
- As Icc1/Icc2 will show an increase in quiescent current when led's are off (blank is high), is there a way to reduce the quiescent purely in software? (i.e. I don't want to switch the supply off, nor trying to actively increase the resistance of Riref)
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In reply to Kenneth Du:
please also answer:
In reply to Dav01:
Ok, thanks Kenneth,
So, any other ways to reduce the standby current of this part (without cutting the power that is)!?
i.e. something we can do via the SPI/Serial pins to reduce the unwanted 5-10mA Icc2 current...
ps. our application is battery-powered by a Li-Po battery.
Understand your requirement but there is no other good way to reduce the Icc current since that's the need of internal circuit.
Interesting, I didn't see these before,
- are these new parts?
- identical in function!?
- for low-power applications, which led-driver from TI would you say is most suitable (still offering pwm + dot-correction, 16-24ch)
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