mono power amplifier Archives - Amplifier Circuit Design

High Quality Monoblock Power Amplifier

Amplifier Circuit — Mon, 05 Sep 2011 06:59:58 +0000

High quality mono audio amplifier circuit. This amplifier is built on the classic symmetrical scheme with output stage operates in class AB and has a pretty good sound, with no complicated setup and scarce components.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/09/monoblock-amplifier.jpg?resize=200%2C111&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/09/monoblock-amplifier.jpg?resize=630%2C350&ssl=1" class="aligncenter size-medium wp-image-409" title="Monoblock amplifier" src="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/09/monoblock-amplifier-300x166.jpg?resize=300%2C166" alt="Monoblock amplifier" width="300" height="166" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/09/monoblock-amplifier.jpg?resize=300%2C166&ssl=1 300w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/09/monoblock-amplifier.jpg?resize=1024%2C569&ssl=1 1024w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/09/monoblock-amplifier.jpg?w=1188&ssl=1 1188w" sizes="(max-width: 300px) 100vw, 300px" />This high quality monoblock power amplifier is a good transistor amplifier circuits. And with a simple high quality power amplifier circuit that can produce good sound quality. This amplifier is built on the classic symmetrical scheme with output stage operates in class AB and has a pretty good sound, with no complicated setup and scarce components.

Correctly assembled amplifier is immediately reduced to setting the quiescent current setting. It put up trimmer R15. First, put a minimum quiescent current and allow the amplifier to work for 15-20 minutes on medium power. After this input shorting switch off and expose the acoustics of a quiescent current of 50-80 mA. It measures the decline in voltage on the resistors R24 – R27, it should be in the range 0,22-0,36 V. The voltage on the right and the left arm might be slightly different. The scheme is desirable to use film capacitors K73-17 or foreign analogues, C8, C12, C13 – can be ceramics. Weekends and proximity with transistors it is desirable to choose pairs, well, at least one of the parties, as mutually desirable to select and VT1, VT3 and VT2, VT4. In the photo resistors R1 and R2 at 0.25 W, and later they were replaced by 2W, although enough of resistors and 0.5 Watts. For transistors VT5, VT7 made a small aluminum heatsink. The dimensions of the PCB 140h80mm.

You can find the power supply of High quality monoblock power amplifier here.

The post High Quality Monoblock Power Amplifier appeared first on Amplifier Circuit Design.

25/50 W Power Amplifier Class D based MAX9709 chip

Amplifier Circuit — Wed, 27 Jul 2011 16:05:04 +0000

25 watts MAX9709 Stereo Mode. Despite the relatively small power output specified in the title of the article, it has one distinct advantage – the acoustics can be connected directly to pins – no extra coils is not required – as they say – all included.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/25-watts-MAX9709-Stereo.jpg?resize=108%2C135&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/25-watts-MAX9709-Stereo.jpg?resize=480%2C290&ssl=1" class="aligncenter size-medium wp-image-92" title="25 watts MAX9709 Stereo" src="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/25-watts-MAX9709-Stereo-240x300.jpg?resize=240%2C300" alt="25 watts MAX9709 Stereo" width="240" height="300" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/25-watts-MAX9709-Stereo.jpg?resize=240%2C300&ssl=1 240w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/25-watts-MAX9709-Stereo.jpg?w=480&ssl=1 480w" sizes="(max-width: 240px) 100vw, 240px" />Despite the relatively small power output specified in the title of the article, it has one distinct advantage – the acoustics can be connected directly to pins – no extra coils is not required – as they say – all included.

Features chips as follows :

Supply voltage,	:10 … 22V
Supply current absence of a signal, mA	:20mA
Maximum Power Output:
in stereo (CG = 10%)	:29W
in mono (CG = 10%)	:50W
“Normal” Power Output:
in stereo (CG = 0.1%)	:12W
in mono (CG = 0.09%)	:22W
S / N ratio (weighted)	:96%
Efficiency (max)	:87%

The device has built-in overload protection, output current limiting, suppression of the “click-and-pop” when you turn on and off. There is also a programmable gain amplifier and switch-off temperature.

50 watts MAX9709 Mono Mode. As can be seen, the device is connected to two power supplies – 22 V – for analog and digital 5-12V. If it is assumed that the chip will be powered by 12 volts, the findings for the power supply can be combined. Otherwise, it is enough to feed the analog part to connect any integral stabilizer – TIPPING or LM.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/50-watts-MAX9709-Mono.jpg?resize=108%2C135&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/50-watts-MAX9709-Mono.jpg?resize=480%2C290&ssl=1" class="aligncenter size-medium wp-image-93" title="50 watts MAX9709 Mono" src="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/50-watts-MAX9709-Mono-240x300.jpg?resize=240%2C300" alt="50 watts MAX9709 Mono" width="240" height="300" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/50-watts-MAX9709-Mono.jpg?resize=240%2C300&ssl=1 240w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/50-watts-MAX9709-Mono.jpg?w=480&ssl=1 480w" sizes="(max-width: 240px) 100vw, 240px" />

As can be seen, the device is connected to two power supplies – 22 V – for analog and digital 5-12V. If it is assumed that the chip will be powered by 12 volts, the findings for the power supply can be combined. Otherwise, it is enough to feed the analog part to connect any integral stabilizer – TIPPING or LM.

The post 25/50 W Power Amplifier Class D based MAX9709 chip appeared first on Amplifier Circuit Design.

60 / 120 watts Power Amplifier LM4780

Amplifier Circuit — Wed, 27 Jul 2011 15:30:45 +0000

Stereo mode of LM4780 schematic diagram. In the chip implements two identical channels of amplification and specifications are for the stereo mode of the amplifier. Chip can also operate in mono – in bridged mode. In this case, the output power at CG = 0.5% at 120 watts. The other characteristics remain practically unchanged.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Stereo-mode-of-LM4780.jpg?resize=120%2C135&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Stereo-mode-of-LM4780.jpg?resize=533%2C321&ssl=1" class="aligncenter size-medium wp-image-82" title="Stereo mode of LM4780" src="../wp-content/uploads/2011/07/Stereo-mode-of-LM4780-266x300.jpg" alt="Stereo mode of LM4780" width="266" height="300" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Stereo-mode-of-LM4780.jpg?resize=266%2C300&ssl=1 266w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Stereo-mode-of-LM4780.jpg?w=533&ssl=1 533w" sizes="auto, (max-width: 266px) 100vw, 266px" />Operating power amplifier integrated circuit LM4780 from National Semiconductor .
What is special? Well, first of all – it is very low harmonic distortion. Typically, manufacturers indicate the maximum power of its regular genius crafts at THD 10%. At the same chip, the CG at the maximum specified power is only 0.5%!

IC Features :

Supply voltage	: 20 … 84V
Supply current absence of a signal	: 110mA
Output Power (CG = 0.5% = 35V Upit)	: 60W
Harmonic (Pout = 30W, RL = 8Ohm)	: 0.03%
S / N ratio (weighted)	: 114%

In the chip implements two identical channels of amplification and specifications are for the stereo mode of the amplifier. Chip can also operate in mono – in bridged mode. In this case, the output power at CG = 0.5% at 120 watts. The other characteristics remain practically unchanged.
Below is a schematic of the LM4780 Mono channel mode :

Mono Mode of 4780 schematic diagram. In the chip implements two identical channels of amplification and specifications are for the stereo mode of the amplifier. Chip can also operate in mono – in bridged mode. In this case, the output power at CG = 0.5% at 120 watts. The other characteristics remain practically unchanged.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Mono-Mode-of-4780.jpg?resize=117%2C135&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Mono-Mode-of-4780.jpg?resize=518%2C312&ssl=1" class="aligncenter size-medium wp-image-83" title="Mono Mode of 4780" src="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Mono-Mode-of-4780-259x300.jpg?resize=259%2C300" alt="Mono Mode of 4780" width="259" height="300" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Mono-Mode-of-4780.jpg?resize=259%2C300&ssl=1 259w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Mono-Mode-of-4780.jpg?w=518&ssl=1 518w" sizes="auto, (max-width: 259px) 100vw, 259px" />Parts list :

Notation on the chart	Nominal
C1	15
C2	15
C3	1uF
C4	1uF
C5	68uF/50V
C6	68uF/50V
C7	0.1
C8	10uF/50V
C9	0.1
C10	1000uF/50V
C11	10uF/50V
C12	1000uF/50V
C13	0.1
C14	0.1

R1	10K
R2	1K
R3	1K
R4	15kOm
R5	1K
R6	15kOm
R7	1K
R8	20kOm
R9	2.7 Ohm
R10	2.7 Ohm
R11	20kOm

DA1	LM4780

The post 60 / 120 watts Power Amplifier LM4780 appeared first on Amplifier Circuit Design.

240W Class D Audio Amplifier based TDA8924

Amplifier Circuit — Mon, 25 Jul 2011 23:44:33 +0000

240W Power Amplifier class D circuit based TDA8924. The chip has a short-circuit proof output, thermal protection and acoustic protection from the “inrush current” when you turn on and off. The scheme provides two options turn on an amplifier – both stereo and mono on a bridge. So this could be used for amplifier subwoofer.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Power-Amplifier-class-D-circuit.jpg?resize=200%2C102&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Power-Amplifier-class-D-circuit.jpg?resize=630%2C323&ssl=1" class="aligncenter size-medium wp-image-52" title="Power Amplifier Class D Circuit" src="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Power-Amplifier-class-D-circuit-300x153.jpg?resize=300%2C153" alt="Power Amplifier class D circuit" width="300" height="153" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Power-Amplifier-class-D-circuit.jpg?resize=300%2C153&ssl=1 300w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Power-Amplifier-class-D-circuit.jpg?resize=1024%2C525&ssl=1 1024w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Power-Amplifier-class-D-circuit.jpg?w=1444&ssl=1 1444w" sizes="auto, (max-width: 300px) 100vw, 300px" />

Power amplifier operates in class D power amplifier is powerful enough produces a total output power 240 W (120 W each channel). Much power is generated by a chip made by Philips TDA8924.

Reference Data :

Supply voltage	: ±12V …± 30V
Supply current absence of a signal	: 100mA
Output power (max)
in stereo	: 120W
in mono	: 240W
Efficiency	: 90%

Chip also has a short-circuit proof output, thermal protection and acoustic protection from the “inrush current” when you turn on and off. The scheme provides two options turn on an amplifier – both stereo and mono on a bridge. So this could be used for amplifier subwoofer.

Power to the amplifier is connected to the following scheme :

This is the power supply for Class D 240W Power Amplifier. The chip has a short-circuit proof output, thermal protection and acoustic protection from the “inrush current” when you turn on and off. The scheme provides two options turn on an amplifier – both stereo and mono on a bridge. So this could be used for amplifier subwoofer.

" data-image-caption="" data-medium-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Class-D-Power-Amplifier-Power-Supply.jpg?resize=177%2C135&ssl=1" data-large-file="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Class-D-Power-Amplifier-Power-Supply.jpg?resize=521%2C314&ssl=1" class="aligncenter size-medium wp-image-53" title="Class D Power Amplifier Power Supply" src="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Class-D-Power-Amplifier-Power-Supply-300x229.jpg?resize=300%2C229" alt="Class D Power Amplifier Power Supply" width="300" height="229" srcset="https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Class-D-Power-Amplifier-Power-Supply.jpg?resize=300%2C229&ssl=1 300w, https://i0.wp.com/amplifiercircuit.net/wp-content/uploads/2011/07/Class-D-Power-Amplifier-Power-Supply.jpg?w=521&ssl=1 521w" sizes="auto, (max-width: 300px) 100vw, 300px" />

Parts list :

Notation on the chart	Value
C1, C2, C3, C4	470nF
C5, C6	330
C7, C11, C17, C20, C8, C12, C18, C22	100
C23, C24, C32, C31	15nF
C25, C26	560
C28, C27	1mkF
C30, C29, C9, C19, C15, C13, C10, C21, C14	220nF
C16	47
D1	KS156A
L1, L2	10 uH
R1, R2, R3, R4	5.6 kOhm
R9, R8	4.7
R10, R11	22
R6, R7	39kOm
R5	30kOm
DA1	TDA8924

Power supply
C1, C2	100nF
C3, C4	470uF/35V
C7, C5, C6	47uF/63V
L1, L2, L3, L4	MURATA BL01RN1A2A2B

The post 240W Class D Audio Amplifier based TDA8924 appeared first on Amplifier Circuit Design.