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Old 24th October 2005, 08:01 AM   #1
Ipanema is offline Ipanema  Malaysia
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Default Lm4702

Hi,

Is this any good?

http://www.national.com/pf/LM/LM4702.html

A new toy for christmas, boy!
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Old 24th October 2005, 10:03 AM   #2
AmA is offline AmA  France
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... wow ...
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Old 24th October 2005, 02:42 PM   #3
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holy crap..... I found my next project when I'm done with my 10 channel 3886 NIGC.
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Old 24th October 2005, 02:44 PM   #4
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cr@p is a blocked word?
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Old 24th October 2005, 04:11 PM   #5
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"I found my next project" Me too. I was thinking of using mosfet instead of darington.
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Old 24th October 2005, 05:44 PM   #6
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There a bit of a lead time on these little puppies. I have had a few on order for a couple of weeks now. Anyone have suggestions as to what to use for the darlingtons on the source/sink pins. This will give me an excuse to use those XFO's that I have sitting around that put out too much voltage for a GC. Should be F.U.N!

G.
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Old 24th October 2005, 06:15 PM   #7
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That does look very interesting.

However, this looks much more fun!
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Old 24th October 2005, 09:19 PM   #8
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From the Spec Sheet:

POWER DISSIPATION AND HEAT SINKING
When in “play” mode, the LM4702 draws a constant amount
of current, regardless of the input signal amplitude. Consequently,
the power dissipation is constant for a given supply
voltage and can be computed with the equation PDMAX = Icc
* (Vcc – Vee). For a quick calculation of PDMAX, approximate
the current to be 25mA and multiply it by the total supply
voltage (the current varies slightly from this value over the
operating range).


Constant power draw? This sounds like it's going to be a real hog. Is this Class A?
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Old 24th October 2005, 11:06 PM   #9
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Quote:
Originally posted by MikeLewis
From the Spec Sheet:

POWER DISSIPATION AND HEAT SINKING
When in “play” mode, the LM4702 draws a constant amount
of current, regardless of the input signal amplitude. Consequently,
the power dissipation is constant for a given supply
voltage and can be computed with the equation PDMAX = Icc
* (Vcc – Vee). For a quick calculation of PDMAX, approximate
the current to be 25mA and multiply it by the total supply
voltage (the current varies slightly from this value over the
operating range).


Constant power draw? This sounds like it's going to be a real hog. Is this Class A?
Sounds that way. can't wait until I get my samples. I could use a little help with some suggestion for the Darlingtons.

G.
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Old 24th October 2005, 11:56 PM   #10
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HOLY COW! I'm ordering a pair right now...and maybe bye bye bridged 4780...
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