[Arm-netbook] LCD LED driver IC recommendation

[luke.leighton]

On Wed, Jan 9, 2013 at 8:23 AM, jm <joem at martindale-electric.co.uk> wrote:
> On Tue, 2013-01-08 at 20:46 +0000, luke.leighton wrote:
>> hi folks,
>>
>> can anyone recommend an LCD backlight driver IC to drive an
>> HV070WS1-100?  also the datasheet's a bugger: one part of it says it
>> needs 40V 30mA, and another says it needs 3.7V @ 420mA - anyone know
>> which is correct?
>
> 40V is absolute max rating.
>
> Typical is 15.5V / 80mA for decent lit screen.

 oh, ok.  that should be easier to find.

> But obviously a switch mode power supply LED driver chip that has dimmer
> controls is needed to control brightness and that must be able to take
> the battery voltage and convert it to supply 15.5V (17V max) @ 80mA to
> light the display properly.

 yeah, that's why i picked the LM1755, but it turns out it's micro-bga
grid, and i don't want micro-bga grid parts.

 i was kinda planning to use the STM32F to do PWM.

 i think i know of a chip that will do - it's cheap and cheerful but
it's DIL (which will do fine).

 any recommendations however would be great.

l.