Monday, August 16, 2010
Exploring power amplifier integrated circuit LM4780 from National Semiconductor.
What's so special? Well, first of all - a very low harmonic distortion. Usually, manufacturers indicate the maximum power of its regular ingenious handicrafts with the harmonic content of 10%. At the same chip, CT at the maximum specified power is only 0,5%! Thus, it is the most honest of all mikruha I encountered.
In the chip implements two identical amplifier channels and features are given for the stereo mode of the amplifier. Circuit can also operate in mono - in bridge inclusion. In this case, the output power at CT = 0.5% of 120 watts. Other features remain virtually unchanged.
Skema rangakain amplifier 60W stereo LM4780
Skema rangakain amplifier 120W Bridged LM4780LM4780 IC Fiture
- Features SPiKe Protection
- Low external component count
- Quiet fade-in/out mute mode
- Wide supply range: 20V - 84V
- Signal-to-Noise Ratio ≥ 97dB (ref. to PO = 1W)
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