TLC5948A: Application Scenario Consulting

Hi Rhea,

Yes. TLC5948ADBQ and TLC6948DBQR can realize the scenario you mentioned.

Could you kindly share more detailed information for me to make a better suggestion?

What is the application / end equipment? What effects do you want to achieve with our devices?

Best Regards,

Steven

Hi Steven,

Thank you very much for your reply!

Requirements: Control 8 RGB LED, need at least 2, 4 control IC, drive current can be adjusted, color can be adjusted, to achieve different color indication under different working conditions.

1. Is TLC5948ADBQ /TLC6948DBQR and the main control only connected to 4 pins (SCLK, GCLK, DATA, LAT)? If I don't want to cascad between the two pieces, should both of them be connected to IO pins?

2.SCLK: serial data transfer clock signal, used for synchronous data transmission control;

GCLK for PWM control reference clock signal, I understand is to control each channel?

How do these two control signals cooperate with DATA to complete the control of LED?

3. Does GSCLK have to be provided by the Controller? Is there an internal CLK that would reduce the resource footprint of the Controller?

4. Does the LP5009 also support this application? Or is the I2C interface also reduced IO pin? I don't know how to choose now, please help to recommend, thank you!

Hi Steven,

No, it's just eight leds. It's one of those lights that has three colors.

In fact, as long as each channel can be individually controlled on the line, you can do some effects.

Best Regards,

Rhea

Hi Steven,

OK ,many thanks~

Hi Rhea,

You are welcome. I am going to close this thread. Feel free to contact me if you have any further questions.

Best Regards,

Steven

Hi Steven,

I'm sorry. I think I hit the wrong button.

Hi Rhea,

No. It was my fault. I am sorry for that.

I will close this thread. Feel free to contact me if you have any further questions.

Best Regards,

Steven

Hi Steven,

TLC5948ADBQ, using out0 ~ out7, IREF connection resistance 2.2K.

Now I have done a version of the program, I want to make the 8 lights gradually light up, the current is about eight levels, the brightest one is set in accordance with the current maximum current (more than 20 mA in theory), is the state we need (is alternating on and off), but the other seven lights in the process of flashing (want only alternating on and off, rather than flashing) May I ask why this phenomenon? Please help analyze it, thank you!

See the attachment for details.

tlc5948A.docx                  

Hi Rhea,

Sorry. I am currently out of office. I will reply to you by the end of 12/30/2022.

BR,

Steven

Hi Rhea,

Sorry for the delayed response.

I need to confirm some things:

1. You mean you want only one red LED (which I circled in the below picture) to blink. However, other LEDs are flashing mistakenly. Is my understanding correct? 

2. Could you check if the pin 21 and pin 22 of TLC5948A are wired correctly?

Best Regards,

Steven

Hi Steven,

Thanks for your reply!

Steven Li said:

You mean you want only one red LED (which I circled in the below picture) to blink. However, other LEDs are flashing mistakenly. Is my understanding correct? 

No. I need eight leds,and they need to light up gradually.

Hi Steven,

Steven Li said:

Could you check if the pin 21 and pin 22 of TLC5948A are wired correctly?

Pin22 is suspended，pin 21 connects to the single chip microcomputer.

Hi Rhea,

Please accept my friendship request on the forum in which I leave my personal contact info there. You can contact me directly. Please let me know if you have any problems in contacting me.

Best Regards,

Steven