Very very low power 120 segments LCD drivers ?

R

Robert Lacoste

Guest
Hi,

I need to drive a 120-segments custom LCD glass (4-way multiplexed) with a
as low as power as possible, I mean significantly under 10ľA (target is 3 to
5ľA), with of course a very low cost solution. I know it is possible (I've
competitors products achieving 2ľA on my desk), but up to now I didn't found
the good driver chip :

- Dedicated low cost LCD driver chips (Holtec, Rohm) are more in the 30-40ľA
range
- Philips chips seems in the 20-30ľA range, but are far more expensive
- Software-based drive of such a display could be possible with a
microcontroller clocked at 32KHz, but I didn't dound any micro with a sub
10ľA power consumption when running at 32KHz (Microchip nanowatt are more in
the 15ľA, Motorola seems in the 100ľA, etc).

I'm sure there is THE solution somewhere, but which one is it ? Is ASIC the
only answer ?

Many thanks for your help...

Cheers,
Robert
 
Robert Lacoste schrieb:

I need to drive a 120-segments custom LCD glass (4-way multiplexed) with a
as low as power as possible, I mean significantly under 10ľA (target is 3 to
5ľA), with of course a very low cost solution. I know it is possible (I've
competitors products achieving 2ľA on my desk), but up to now I didn't found
the good driver chip :

- Dedicated low cost LCD driver chips (Holtec, Rohm) are more in the 30-40ľA
range
- Philips chips seems in the 20-30ľA range, but are far more expensive
- Software-based drive of such a display could be possible with a
microcontroller clocked at 32KHz, but I didn't dound any micro with a sub
10ľA power consumption when running at 32KHz (Microchip nanowatt are more in
the 15ľA, Motorola seems in the 100ľA, etc).

I'm sure there is THE solution somewhere, but which one is it ? Is ASIC the
only answer ?
Click to expand...
Have a look at the chips from Seiko-Epson, they are *very* low
power and might match your needs.

--
Dipl.-Ing. Tilmann Reh
Autometer GmbH Siegen - Elektronik nach Maß.
http://www.autometer.de

==================================================================
In a world without walls and fences, who needs Windows and Gates ?
(Sun Microsystems)
 
Hi Robert,

if you need a ľC anyway, have a look at TIs MSP430. Very low power,
available with up to 160-LCD-segment-driver.

Andreas
 
Hi Robert,

if you need a ľC anyway, have a look at TIs MSP430. Very low power,
available with up to 160-LCD-segment-driver.

Andreas
 
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