LP8860-Q1: Minimum OUT current

Pjs

Part Number: LP8860-Q1

Hi,

What is the minimum current load on the OUTn pins? I'm looking to run 4 chains of LEDs at low current (a few mA per chain) - is such a low load likely to cause any issues?

Also, is there a minimum load for the boost converter?

Many thanks

over 6 years ago

0 Charles-Chen over 6 years ago

TI__Genius 11836 points

Hi, Pjs,

Proper engineer has been assigned to take a look at this and will reply you soon.

0 Shirley He over 6 years ago in reply to Charles-Chen

TI__Expert 5475 points

Hi,

The maximum current set with Riset resistor or with DRV_LED_CURRENT_SCALE EEPROM bits can't be too low. The current accuracy is not quite good at a very low current setting. But you can set the maximum current at a high level, such as 150mA, and then use the register LED_CURRENT_CTRL[11:0] or DISP_CL1_CURRENT[11:0] to set the current. In that case, you can get very small current. And there's no issue to set a low current.

There's no minimum load for the boost converter.

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LP8860-Q1: Minimum OUT current