iam on the search for the right TI-LED-Driver chip.
my requirements are
- Input:
- 5-12V DC
- Output:
- single HP LED (~ 3V@350mA)
- (optional 1..3 leds - 3..9V@350mA)
- 350mA / 700mA option
target is a really nice smooth dimming - and that specially in the low levels.
so a jump-less dimming from 0% on is key-feature.
one idea for this is to use the led current in the low dimming area -
so - for the first 2% of dimming range use current adjustment with an DAC and for >2%..100% PWM
the target board will have 4-channels separate controlled by a 5V uC.
i have searched the http://www.ti.com/lsds/ti/power-management/led-lighting-products.page#p207=DC/DC&p2297=PWM; Analog LED-Driver Product base.
but iam not sure about the right direction.
i also look for a system that is easy to hand solder - just because it will not go in series production - its tech- artwork...
so i like big footprints - and low component counts ;-)
and easy to source components - so its best if the 'special Low-Value-Resistor' for Rsens is build in..
i hope some one have an idea in what direction to look...
sunny greetings
stefan
PS: i don't know why my formating is lost - i just write the content in the webpage -
and for me after posting it shows up as on big text without spaces.....
edit: i have inserted html linebreaks (<br>) to format the text..
