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EL panel driver (46 in2 - 300 cm2)

s1m0n3t

Hi,

 

I'm searching for a driver solution for an EL panel with about 46 in2 surface.

 

These are the main features of the panel:

 

Operating voltage: 70-115 V AC

Operating frequency: 400-800 Hz

Power usage typical: 5-10mW/cm2

Light intensity (80V 600Hz): 40 cd/m2

Luminosity (80V 600Hz): 100-300 lux

Operating current (80V 600Hz): 0.1mA/cm2

 

So, with maximum surface of my panel (300 cm2), I will need 3W of maximum power, or 30mA @ 80-100V.

 

An other important feature I need is to dim the light intensity with a digital control (pwm or variable input voltage or other else).

 

I've found many integrated controller, also with PWM input, but none of these can handle a panel larger than 36 cm2 (5,6 in2):

 

MAX14521E (Maxim)
HV859 (Microchip - Supertex) - and similar, same family
MP3802 (Monolithic Power)

 

Does anyone know an alternative solution, maybe with discrete components (power mosfet, triac)?

 

Thank you in advance!

 

Simone

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  • 0

    Update:

     

    I just found this step up converter with an interesting typical application on the datasheet (page 7), which I report here:

     

    image

     

    This is the regulator: LT1305

     

    The switching current is rated 2A, so with a 1:15 transformer it can handle a maximum current of 130mA at the output.

     

    My application requires about 30mA of current, so it should be fine.

     

    I can replace R1 with a digital potentiometer (like MCP4017) to adjust the output voltage, so the light intensity.

     

    What do you think about it?

Reply
  • 0

    Update:

     

    I just found this step up converter with an interesting typical application on the datasheet (page 7), which I report here:

     

    image

     

    This is the regulator: LT1305

     

    The switching current is rated 2A, so with a 1:15 transformer it can handle a maximum current of 130mA at the output.

     

    My application requires about 30mA of current, so it should be fine.

     

    I can replace R1 with a digital potentiometer (like MCP4017) to adjust the output voltage, so the light intensity.

     

    What do you think about it?

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