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How to use Programmable-Current LED Lamp Driver IC with PWM Dimming
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dhaval
Dec 11, 2012, 1:54:26 AM12/11/12
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Dear sir,
I am new bee in electronics. [basically computer guy]
I need to resolve following scenario :
Using 3.3V DC supply [which can provide me PWM signals],i need to make dimming the LEDs [which is operated through AC Line 240V].
I have searched following IC :
http://www.supertex.com/pdf/datasheets/HV9925.pdf
But i dont know how to use it...
please help me to resolve this issue.
:)
I am new bee in electronics. [basically computer guy]
I need to resolve following scenario :
Using 3.3V DC supply [which can provide me PWM signals],i need to make dimming the LEDs [which is operated through AC Line 240V].
I have searched following IC :
http://www.supertex.com/pdf/datasheets/HV9925.pdf
But i dont know how to use it...
please help me to resolve this issue.
:)
miso
Dec 11, 2012, 4:02:37 AM12/11/12
to
This chip doesn't provide isolation. I'd think twice about using it if
you are not familiar with electronics design.
The chip provides a 7.5v output which presumably you could use to power
up PWM circuitry, but I don't know if I would trust bringing the PWM
control to the outside world due to a lack of isolation.
If you are just experimenting, why not get a surplus 48vdc switcher,
then use a DC/DC to drive the LEDs.
If you are trying to develop a product to sell on the open market, I
think this is over your head.
you are not familiar with electronics design.
The chip provides a 7.5v output which presumably you could use to power
up PWM circuitry, but I don't know if I would trust bringing the PWM
control to the outside world due to a lack of isolation.
If you are just experimenting, why not get a surplus 48vdc switcher,
then use a DC/DC to drive the LEDs.
If you are trying to develop a product to sell on the open market, I
think this is over your head.
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