LP5018: LED flashing scenario can be achieved?

Yen Ting Chu

Part Number: LP5018

Hi Team,

My customer is looking at LP5018, but there is one LED lighting scenario, in which we are unsure about LP5018. The scenario requires the LEDs to light up immediately when the system is plug in. LED driver is controlled by the SoC in the system. My customer is concerned that LED flashing will be delayed since SoC requires time to boot up and then give I2C command to LP5018.

Can LP5018 do the above user scenario, i.e. LED flashing immediately when the system is power plug in? Or is there other LED driver suggestion or other way to implement such design? Thanks.

Best regards,

Andy Chu

over 4 years ago

0 Hardy Wu over 4 years ago

TI__Genius 12915 points

Hi Andy,

Sorry that LP50 would be powered up by send 2 commands to register at least. And also we have no device to support this function because we want to avoid turning on unexpected channels.

0 Yen Ting Chu over 4 years ago in reply to Hardy Wu

TI__Intellectual 1350 points

Hi Hardy,

If LP50xx can't support such spec, is there any device suggestion or any design methodology to perform such LED driving?

Thanks,

Best regards,

Andy Chu

0 Hardy Wu over 4 years ago in reply to Yen Ting Chu

TI__Genius 12915 points

Hi Andy,

As I mentioned in last reply, we have no device to support this function because we want to avoid turning on unexpected channels. Communication is necessary to illuminate LEDs by LED driver. What function does customer want for this quick turn-on LED? If they just want it on/off but no other dimming or animation request, LED could be connected to power supply directly. Just make sure the forward voltage and current are in the LED’s spec.

Power management

Power management forum

LP5018: LED flashing scenario can be achieved?