[Arm-netbook] urgent: laptop I/O Board - IC selection needed for Battery charging and monitor, LCD Backlight PWM and power supply, and AC97 USB Audio

[lkcl luke]

allo simon,

yes that initially looks good... except...

"The SMB347 is a programmable single-cell lithium-ion/lithium-polymer
battery chargers designed for a variety of portable applications."

the key feature which makes it unsuitable is "single-cell".

i think.... i think.... it may be necessary to just have a hardware
charging circuit and just have a battery monitor IC rather than
anything else.   i know some of these big 6-cell batteries come with
built-in charging on an I2C circuit: at this point we just don't know
if that's what's in the sample laptops being converted.

... yes, we've asked the client to provide them ASAP... :)

l.

On 8/31/12, Simon Kenyon <simon at koala.ie> wrote:
> On 08/31/12 13:37, lkcl luke wrote:
>> hi folks,
>>
>> right, our client finally asked for help in getting the laptop made,
>> by mid-october.  as that's far too tight a deadline to use an STM32F,
>> discrete components have to be selected for audio, battery and lcd
>> PWM.  that means I2C or USB devices, which need to have linux kernel
>> device drivers already written (to save time).
>>
>> the max17040 has code in drivers/i2c but it's a "monitor" system
>> rather than an actual charger IC.  i'd like to find a charger IC that
>> can do around 2A and charge a multi-cell laptop battery.
>>
>> audio i found the GL632 but i really need help finding alternatives.
>>
>> LCD PWM *should* be easy as an I2C device but again if one already
>> exists i'd like to use that.
>>
>> much appreciated some assistance finding suitable ICs here.
>
> what about http://www.summitmicro.com/prod_select/summary/SMB347/SMB347.htm
>
> there is a linux device driver for it.
>
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