LP5891: Can the LP5891EVM be connected to an external LED display(chips)?

Hi Yuji,

No. It can't be connected to an external LED display.

Best Regards,

Steven

Hi Yuji,

I am sorry about that.

For an external LED display, you can design the board yourself, with the LEDs and the LP5891 on the same board.

Is there anything else we can help regarding your project? You can provide more detailed information if possible so that we can provide better suggestions.

Best Regards,

Steven

Hi Steven,

Thanks for the suggestion.

Now We are developing new led matrix display.
We want to know its capability.

We are plannning to evaluate our new led display with LP5891.

But LP5891 can drive up to 20mA.
It may not enough abillity.
More power may need.

Please teach us, If you have any matrix led driver with more driving abillity.
We would be happy if its has evaluation board with external led terminal.

Best Regards,

Yuji

Hi Yuji,

Thanks for your replying. I need more information to give you some advice.

1. What end equipment will your matrix display be used in? Do you need automotive version chip or not?
2. What's the average current for each LED? What's your pixel pitch and LED panel size?
3. Do you need internal scanning FET solution, like LP5891? Or can you accept external scanning FET solution, like TLC6946 / TLC6948?

Best Regards,

Steven

Hi Steven,

Thanks for your reply.

>What end equipment will your matrix display be used in?
Planning to Signage application for outdoor use.

>Do you need automotive version chip or not?
No need.

>What's the average current for each LED?
Probably 5-40mA depends on size and luminance.

>What's your pixel pitch and LED panel size?
About Pitch, We will decide based on the results of the evaluation.
About Size , TBD.

>Do you need internal scanning FET solution, like LP5891?Or can you accept external scanning FET solution, like TLC6946 / TLC6948?
I do not know the details,
I think internal scannning FET solution type is easy to use.

Best Regards,

Yuji

Hi Yuji,

5-40mA is the max LED current. Right?

For internal scanning FET, the max channel current output capability of our current solutions is 20mA. You can check TLC6983 / TLC6984 / LP5891 / LP5890. (Difference in this thread: [FAQ] How to master LP589x / TLC698x devices with LED display applications within five minutes? - Power management forum - Power management - TI E2E support forums)

For external scanning FET, devices such as TLC5946 / TLC5943 may be a choice for your application.

Best Regards,

Steven

Hi Yuji,

You are welcome.

Some supplements: Devices like TLC5929 / TLC5948A can also be a choice for your 5-40mA case. In fact, we have multi-channel LED display drivers that support max channel output current = 120 mA, such as TLC5940 / TLC59401. Hope this will give you more choices when you develop your products. Anyway, the final choice depends on your product specifications (such as the number of channels, current / voltage requirements, etc.).

Let's keep in touch. I am willing to help if you have any further questions or need any further suggestions.

Best Regards,

Steven

Hi Yuji,

You are welcome.

Best Regards,

Steven