LM3532: Addressing multiple LM3532's on the same board? Your recommendation?

Hi Leif,

Do you mean your application needs more than 3 LED strings? I would like to know why you need more than one LM3532 on the same board. Thanks

BR

Patrick

He he ... I'm always amused when curiosity forgoes an answer. 

Happy to explain. I design small custom lighting projects. Sometimes, more than three controllable strings are desired. 

Hi Leif,

Because LM3532 only has one I2C address, so there will hardly have solution except for adding more MCUs. Or let me know if you also accept other new LED drivers?

BR

Patrick

I accept other new LED drivers. It's been a couple years since I scoured the market.  The current project I'm focused on is battery based, using 2 or 3 AA's NiMH. (3 in LM3532's case).  I'd like to know what you recommend. Here's my list (LM3532 being the best offering for me at the time and currently): 

Hi Leif,

May I know your VIN, VOUT and LED current? These will help me find suitable solutions.

BR

Patrick

Vin_min = 2.4 - 3.6

Vout  = 20v

LED Current = 15mA

Hi Leif,

LP8556 is a 6-CH LED driver with I2C. But the input voltage down to 2.4V is a big challenge for our device.

LP8556

BR

Patrick

Thanks for the suggestion. It looks like a solid alternative as long as I stick to 3AA's if using NimH to stay above the Vin min of 2.7V

It does not appear that the 6 channels of the LP8556 can be individually controlled other than enabling/disabling. I need individual channel dimming.

Hi Leif,

TPS61196 could support individual current dimming but it will over spec too much. So we may not have more suitable device for this application.

BR

Patrick