Showing posts with label 20. Show all posts
Showing posts with label 20. Show all posts

Wednesday, April 10, 2013

Dual 20 Watt Audio Power Amplifier

Overture Audio Power Amplifier Series Dual 20-Watt Audio Power Amplifier with Mute and Standby Modes
The LM1876 is a stereo audio amplifier capable of delivering typically 20W per channel of continuous average output power into a 4 or 8 load with less than 0.1% THD+N. Each amplifier has an independent smooth transition fade-in/out mute and a power conserving standby mode which can be controlled by external logic.

The performance of the LM1876, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, places it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are safeguarded at the output against overvoltage, undervoltage, overloads, including thermal runaway and instantaneous temperature peaks.

Dual 20-Watt Audio Power Amplifier Circuit diagram :

Dual 20-Watt Audio Power Amplifier

Key Specification
THD+N at 1kHz at 2 x 15W continuous average
output power into 4 or 8: 0.1% (max)
THD+N at 1kHz at continuous average
output power of 2 x 20W into 8: 0.009% (typ)
Standby current: 4.2mA (typ)

Applications :

  • High-end stereo TVs
  • Component stereo
  • Compact stereo
    Features :
  • SPiKe protection
  • Minimal amount of external components necessary
  • Quiet fade-in/out mute mode
  • Standby-mode
  • Isolated 15-lead TO-220 package
  • Non-Isolated 15-lead TO-220 package
  • Wide supply range 20V - 64V 

    • Source : http://www.ecircuitslab.com/2011/06/dual-20-watt-audio-power-amplifier.html
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    Saturday, April 6, 2013

    9 20 Volt amplifier circuit

    KA2203 , SN16975, TBA820, UL1482P schematicsFor this time I will post the scheme following an amplifier of the IC KA2203, SN16975, TBA820, UL1482P. Which has 4 Watt power output with 4 Ohm impedance. At least 8 Volt supply voltage and a maximum of 20 volts.



    Part List
    R1 = 100K
    R2 = 56R 
    R3 = 56R
    Use 1/2 W resistor

    Rangkaian amplifier KA2203 , SN16975, TBA820, UL1482P
    C1 = 47uF
    C2 = 100uF
    C3 = 100uF
    C4 = 470uF
    C5 = 470pF
    C6 = 0.22uF
    C7 = 100uF
    U1 = KA2203 , SN16975, TBA820, UL1482P
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