power-amplifier 2
A friend is interested in building a hi-fi power amplifier, specifically a Class AB model due to its quality sound, particularly in bass response and distinct clarity. This circuit is designed as a hi-fi OCL (Output Capacitor-Less) power amplifier with a power output of 120W RMS, provided that a suitable power supply is used, specifically with 8-ohm speakers. The circuit exclusively utilizes transistors without any integrated circuits. For optimal performance, the power supply should provide +40V and -40V, delivering approximately 4A of current. Additional details can be found in the circuit diagram. The STA505 is a monolithic quad half-bridge stage utilizing Multipower BCD Technology. This device can be configured as a dual bridge or a single bridge with double current capability by connecting the CONFIG pin to the Vdd pin. The amplifier can also operate in half-bridge mode, which provides half the current capability. This audio power amplifier is capable of delivering 80 watts of audio into an 8-ohm load. The LM3875 IC requires proper heat sinking. It is important to note that the amplifier is a bridged circuit, with both speaker leads being active. This design includes several external components compared to standard schematics, along with a simple high-frequency filter on the input. The IC supports mute and standby functions. The TDA7294 is another option for a hi-fi amplifier, capable of providing 100W RMS with 10% distortion, or 50W RMS with 1% distortion at a supply voltage of 30V. Its frequency range extends from 16Hz to 100kHz, and it also requires good heat sinking. A symmetrical 30V power supply is sufficient to power this unit, which comes in an 8-pin DIL package. The LM3875, a preferred choice, can deliver up to 56W RMS continuously with peaks of 100W at a distortion rate of 0.05%. This chip is capable of functioning as a DC amplifier, allowing for a frequency response up to 400kHz.
The LM3875 Chip Amplifier represents a notable design within the realm of audio amplification, utilizing a single integrated circuit based on operational amplifier technology. The circuit's design emphasizes high efficiency and sound fidelity, making it suitable for audiophiles seeking quality performance. The amplifier's architecture is characterized by a robust power supply design, which is critical for maintaining stability and minimizing distortion during operation.
The choice of components, including the STA505 and LM3875, reflects a balance between performance and simplicity, avoiding the complexities often associated with integrated solutions. The implementation of discrete transistors allows for greater flexibility in tuning the amplifier's characteristics, such as gain and frequency response.
The circuit's configuration as a bridged amplifier enhances its output capabilities, effectively doubling the voltage swing across the load compared to a standard single-ended design. This approach is particularly advantageous when driving 8-ohm speakers, as it maximizes the power delivered while maintaining sound quality.
Heat management is a crucial aspect of the design, necessitating the use of adequate heat sinks to ensure reliability during prolonged operation. The inclusion of mute and standby functions adds versatility, allowing the user to manage power consumption and reduce noise during idle periods.
In summary, this hi-fi power amplifier circuit is designed for those who appreciate quality audio reproduction, offering a powerful output while maintaining low distortion and a wide frequency response. The careful selection of components and thoughtful circuit design contribute to an amplifier that not only meets but exceeds the expectations of discerning audio enthusiasts.A friend takes an interest to want to try build hi-fi power Amplifier the some one. He likes model class AB, because the sound is good. keen bass good distinct. I chooses this circuit gives him sees, be power Amplifier hi-fi OCL 120W rms sizes really, if use power supply circuit at enough good and use 8ohm size prominent point interesting loudspea kers. Of the circuit be use the transistor entirely have no the integrated circuit mixes. Then make bland good sound, for power supply voltage should use +40V GND -40V sizes give current about 4A. Other detail please see in circuit picture better STA505 is a monolithic quad half bridge stage in Multipower BCD Technology.
The device can be used as dual bridge or reconfigured, by connecting CONFIG pin to Vdd pin, as single bridge with double current capability, and as half bridge (Binary mode) with half current capability. This Audio power Amplificator will deliver 80 watt of audio into an 8 Ohm load. The LM3875 IC devices should be suitably heatsinked. Note that the amplifier is a bridged circuit, with both speaker leads hot . This one is already pretty strong. It`s got a handful of additional external devices in comparison to the generic schematic. Note that there`s a simple HF filter on the input. This IC supports mute and stand-by modes. I`ve never built this one, so I`ve got no suggestions concerning practical construction. This is a stronger type. It features mute and stand-by functions, which require some additional discrete devices. The rest is just the common op-ampish and power-ampish stuff. I`ve never built this one, so I`ve got no suggestions concerning practical construction. The TDA7294 is a Hi-Fi amplifier and can give 100W RMS but with 10% distortion. Supplying 30 Volts you can have 50 Watts RMS with 1% distortion. Frequency range start at 16Hz and can reach 100KHz. Make sure you are using good heatsink. The chip supports mute function as well. A symmetrical 30V power supply is all its need to power the unit. A very useful audio amp in an 8-pin DIL package. The IC features a very low minimum working supply voltage of 3V, low quiescent current, good ripple rejection, no crossover distortion and low power dissipation.
Maximum supply voltages is 16 Volts into 16 Ohms speaker, 12Volts into 8 Ohms and 9Volts into 4 Ohms. That is, a single integrated circuit based on an operational amplifier (op amp) on a single substrate of silicon.
The LM3875 is the weapon of choice. This great chip, is a little larger than the size of a thumbnail and can deliver up to 56W RMS continuous with 100W peaks and it can do this at 0. 05% distortion! Because they are DC amplifiers (DC coupling right through the amp) they can go all the way to 400kHz!
The Beast is a LM3875 Chip Amplifier, built from a popular chipamp kit. I`m hard to please and always looking for new things to try in audio. If it involves a DIY project, all the better. Mark and Gio had been after me to try a chipamp for some time. I really didn`t need any more amps and the spousal concern factor has been growing! My collection of gear exceeds size of my listening room and stray pieces are being stashed throughout the house. If you have looked at the other projects on the site you will see that a modified K-12 is my primary serious listening amp.
It does what I ask and more. I used the original board layout, transistors and JFETs, and made some modifications. Heat sinking was increased to approximately triple the amount recommended. Instead of using the standard bridge rectifier, capacitor bank and battery setup, I opted for a fully regulated supply with a total of 127, 0000 uF capacitance per channel and a 500 VA toroid transformer My goal was to design a high-powered wide-bandwidth amplifier with the finest sound and to keep it simple but not too simple. I rejected single-ended (SE) designs because of their low power and limited bandwidth. I wanted to see if I could g 🔗 External reference
The LM3875 Chip Amplifier represents a notable design within the realm of audio amplification, utilizing a single integrated circuit based on operational amplifier technology. The circuit's design emphasizes high efficiency and sound fidelity, making it suitable for audiophiles seeking quality performance. The amplifier's architecture is characterized by a robust power supply design, which is critical for maintaining stability and minimizing distortion during operation.
The choice of components, including the STA505 and LM3875, reflects a balance between performance and simplicity, avoiding the complexities often associated with integrated solutions. The implementation of discrete transistors allows for greater flexibility in tuning the amplifier's characteristics, such as gain and frequency response.
The circuit's configuration as a bridged amplifier enhances its output capabilities, effectively doubling the voltage swing across the load compared to a standard single-ended design. This approach is particularly advantageous when driving 8-ohm speakers, as it maximizes the power delivered while maintaining sound quality.
Heat management is a crucial aspect of the design, necessitating the use of adequate heat sinks to ensure reliability during prolonged operation. The inclusion of mute and standby functions adds versatility, allowing the user to manage power consumption and reduce noise during idle periods.
In summary, this hi-fi power amplifier circuit is designed for those who appreciate quality audio reproduction, offering a powerful output while maintaining low distortion and a wide frequency response. The careful selection of components and thoughtful circuit design contribute to an amplifier that not only meets but exceeds the expectations of discerning audio enthusiasts.A friend takes an interest to want to try build hi-fi power Amplifier the some one. He likes model class AB, because the sound is good. keen bass good distinct. I chooses this circuit gives him sees, be power Amplifier hi-fi OCL 120W rms sizes really, if use power supply circuit at enough good and use 8ohm size prominent point interesting loudspea kers. Of the circuit be use the transistor entirely have no the integrated circuit mixes. Then make bland good sound, for power supply voltage should use +40V GND -40V sizes give current about 4A. Other detail please see in circuit picture better STA505 is a monolithic quad half bridge stage in Multipower BCD Technology.
The device can be used as dual bridge or reconfigured, by connecting CONFIG pin to Vdd pin, as single bridge with double current capability, and as half bridge (Binary mode) with half current capability. This Audio power Amplificator will deliver 80 watt of audio into an 8 Ohm load. The LM3875 IC devices should be suitably heatsinked. Note that the amplifier is a bridged circuit, with both speaker leads hot . This one is already pretty strong. It`s got a handful of additional external devices in comparison to the generic schematic. Note that there`s a simple HF filter on the input. This IC supports mute and stand-by modes. I`ve never built this one, so I`ve got no suggestions concerning practical construction. This is a stronger type. It features mute and stand-by functions, which require some additional discrete devices. The rest is just the common op-ampish and power-ampish stuff. I`ve never built this one, so I`ve got no suggestions concerning practical construction. The TDA7294 is a Hi-Fi amplifier and can give 100W RMS but with 10% distortion. Supplying 30 Volts you can have 50 Watts RMS with 1% distortion. Frequency range start at 16Hz and can reach 100KHz. Make sure you are using good heatsink. The chip supports mute function as well. A symmetrical 30V power supply is all its need to power the unit. A very useful audio amp in an 8-pin DIL package. The IC features a very low minimum working supply voltage of 3V, low quiescent current, good ripple rejection, no crossover distortion and low power dissipation.
Maximum supply voltages is 16 Volts into 16 Ohms speaker, 12Volts into 8 Ohms and 9Volts into 4 Ohms. That is, a single integrated circuit based on an operational amplifier (op amp) on a single substrate of silicon.
The LM3875 is the weapon of choice. This great chip, is a little larger than the size of a thumbnail and can deliver up to 56W RMS continuous with 100W peaks and it can do this at 0. 05% distortion! Because they are DC amplifiers (DC coupling right through the amp) they can go all the way to 400kHz!
The Beast is a LM3875 Chip Amplifier, built from a popular chipamp kit. I`m hard to please and always looking for new things to try in audio. If it involves a DIY project, all the better. Mark and Gio had been after me to try a chipamp for some time. I really didn`t need any more amps and the spousal concern factor has been growing! My collection of gear exceeds size of my listening room and stray pieces are being stashed throughout the house. If you have looked at the other projects on the site you will see that a modified K-12 is my primary serious listening amp.
It does what I ask and more. I used the original board layout, transistors and JFETs, and made some modifications. Heat sinking was increased to approximately triple the amount recommended. Instead of using the standard bridge rectifier, capacitor bank and battery setup, I opted for a fully regulated supply with a total of 127, 0000 uF capacitance per channel and a 500 VA toroid transformer My goal was to design a high-powered wide-bandwidth amplifier with the finest sound and to keep it simple but not too simple. I rejected single-ended (SE) designs because of their low power and limited bandwidth. I wanted to see if I could g 🔗 External reference
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