official Sony screen
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whats the most volts can you put into an official Sony screen, with out killing it....
You won't blow any fuses with extra voltage. Since the voltage gets regulated off the top, the current draw remains constant as long as you're putting in at least ~7V.
But the screen, stock, draws 1A. Already you're dissipating (7.2V-5V)*1A=2.2W of power. At 10V, that's up to 5W.
Looking at the 7805 datasheet, a bare TO-220 is rated for 4W. Less in an enclosed space, more with a fan or heatsink. So in a small space, don't use more than about 8-9V; in the open, maybe up to 10V; with a fan, you could probably get away with 12V without damaging anything. (But at that point, you've nearly doubled the power consumption of the screen.)
But the screen, stock, draws 1A. Already you're dissipating (7.2V-5V)*1A=2.2W of power. At 10V, that's up to 5W.
Looking at the 7805 datasheet, a bare TO-220 is rated for 4W. Less in an enclosed space, more with a fan or heatsink. So in a small space, don't use more than about 8-9V; in the open, maybe up to 10V; with a fan, you could probably get away with 12V without damaging anything. (But at that point, you've nearly doubled the power consumption of the screen.)
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Some interesting things on the datasheet. I'm looking at this one. One chart shows voltage differential vs output current. Drawing 1A, you can only put about 35V into it. (35V is also the nominal max. I missed that one before.)
Still, the main issue is power dissipation. At 35V, you're making a 4W part dissipate 30W. Something's going to melt.
And you're wasting batteries.
If you want to put 12V into this thing, I suggest looking into DC-DC converters. You can get some 1A+ parts that are no more than an inch square.
Still, the main issue is power dissipation. At 35V, you're making a 4W part dissipate 30W. Something's going to melt.
And you're wasting batteries.
If you want to put 12V into this thing, I suggest looking into DC-DC converters. You can get some 1A+ parts that are no more than an inch square.
There is something I don't quite get, I didn't take any electronics courses so bare with me. My psone's power adapter only outputs 7.5 volts.
However, it powers both the PSone and the sony screen when plugged in. If the ps1 needs 7.2 volts, then how is it possible for the screen to even power on, since the PS1 is already taking so much of the power. I saw something on the board that looked kind of like wrapped copper coils, how many volts can it boost (assuming that is what it does)?
I'm a little confused.
However, it powers both the PSone and the sony screen when plugged in. If the ps1 needs 7.2 volts, then how is it possible for the screen to even power on, since the PS1 is already taking so much of the power. I saw something on the board that looked kind of like wrapped copper coils, how many volts can it boost (assuming that is what it does)?
I'm a little confused.
Guest, when you hook up system + screen to the adaptor, the same voltage is applied to each. The required current increases, which is why a 3A adaptor came with your screen, as opposed to a 2A one with the PSOne.
The coils boost voltage to at least 800-1000 volts, probably more. The stock backlight needs that kind of voltage.
The coils boost voltage to at least 800-1000 volts, probably more. The stock backlight needs that kind of voltage.