60W MosFet Audio Amplifier

High Quality, powerful unit: 90W into 4 Ohm load Also suited as guitar or bass amplifier

60W MosFet Audio Amplifier

60W MosFet Audio Amplifier Description

To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 - 90W High Quality power amplifier design is presented here.

Circuit topology is about the same of the above mentioned amplifier, but the extremely rugged IRFP240 and IRFP9240 MosFet devices are used as the output pair, and well renowned high voltage Motorola's transistors are employed in the preceding stages.

The supply rails voltage was kept prudentially at the rather low value of + and - 40V. For those wishing to experiment, the supply rails voltage could be raised to + and - 50V maximum, allowing the amplifier to approach the 100W into 8 Ohm target: enjoy!

A matching, discrete components, Modular Preamplifier design is available here:Modular Audio Preamplifier.

Notes:

• In the original circuit, a three-diode string was wired in series to R10. Two of these diodes are now replaced by a red LED in order to achieve improved quiescent current stability over a larger temperature range. Thanks to David Edwards of LedeAudio for this suggestion.
• A small, U-shaped heatsink must be fitted to Q6 & Q7.
• Q8 & Q9 must be mounted on large heatsinks.
• Quiescent current can be measured by means of an Avo-meter wired in series to the positive supply rail and no input signal.
• Set the Trimmer R10 to its minimum resistance.
• Power-on the amplifier and adjust R10 to read a current drawing of about 120 - 130mA.
• Wait about 15 minutes, watch if the current is varying and readjust if necessary.
• The value suggested for C1 and C2 in the Power Supply Parts List is the minimum required for a mono amplifier. For optimum performance and in stereo configurations, this value should be increased: 10000µF is a good compromise.
• A correct grounding is very important to eliminate hum and ground loops. Connect to the same point the ground sides of R1, R3, C2, C3 and C4 and the ground input wire. Connect R7 and C7 to C11 to output ground. Then connect separately the input and output grounds to the power supply ground.

Parts:

R1______________47K   1/4W Resistor
R2_______________4K7  1/4W Resistor
R3______________22K   1/4W Resistor
R4_______________1K   1/4W Resistor
R5,R12,R13_____330R   1/4W Resistors
R6_______________1K5  1/4W Resistor
R7______________15K   1/4W Resistor
R8______________33K   1/4W Resistor
R9_____________150K   1/4W Resistor
R10____________500R   1/2W Trimmer Cermet
R11_____________39R   1/4W Resistor
R14,R15___________R33 2.5W Resistors
R16_____________10R   2.5W Resistor
R17_______________R22   5W Resistor (wirewound)

C1_____________470nF   63V Polyester Capacitor
C2_____________470pF   63V Polystyrene or ceramic Capacitor
C3______________47µF   63V Electrolytic Capacitor
C4,C8,C9,C11___100nF   63V Polyester Capacitors
C5______________10pF   63V Polystyrene or ceramic Capacitor
C6_______________1µF   63V Polyester Capacitor
C7,C10_________100µF   63V Electrolytic Capacitors

D1___________1N4002   100V 1A Diode
D2_____________5mm. Red LED

Q1,Q2,Q4_____MPSA43   200V 500mA NPN Transistors
Q3,Q5________BC546     65V 100mA NPN Transistors
Q6___________MJE340   200V 500mA NPN Transistor
Q7___________MJE350   200V 500mA PNP Transistor
Q8___________IRFP240  200V 20A N-Channel Hexfet Transistor
Q9___________IRFP9240 200V 12A P-Channel Hexfet Transistor

60 W Quad Half-Bridge Digital Amplifier

General Description:

The CS44130 is a high-efficiency power stage for digital Class-D amplifiers designed to recieve PWM signals from a modulator such as the CS44800/600. The power stage outputs can be configured as four half-bridge channels, two half-bridge channels and one full-bridge channel, two full-bridge channels, or one parallel full-bridge channel.

Features:

 Configurable Outputs (10% THD+N)

– 2 x 30 W into 8 Ω, Full-Bridge

– 1 x 60 W into 4 Ω, Parallel Full-Bridge

– 4 x 15 W into 4 Ω, Half-Bridge

– 2 x 15 W into 4 Ω, Half-Bridge + 1 x 30 W 

into 8 Ω, Full-Bridge

 Space-Efficient, Thermally-Enhanced QFN 

Package

 PWM Popguard® Technology for Quiet Startup

 > 100 dB Dynamic Range - System Level

 < 0.12% THD+N @ 1 W - System Level

 Built-In Protection with Error Reporting

– Over-Current

– Thermal Warning

– Thermal Fault

– Under-Voltage

 Single (+10.8 V to +21 V) High Voltage Supply

 High Efficiency (90%)

 Low RDS(ON)

 Low Quiescent Current

 Low Power Standby Mode

Common Applications

 Digital Televisions

 MP3 Docking Stations

 Mini Shelf Systems

 Networked Audio/POE Systems

 Desktop Speakers

Circuit Diagram:

60 W Quad Half-Bridge Digital Amplifier

Datasheet for CS44130: Download

70V - 60W DMOS Audio Amplifier

General Description:

The TDA7296 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Topclass TV)

Circuit Diagram:

Circuit diagram for 70V - 60W DMOS Audio Amplifier

Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier

Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier

Datasheet: Download

High Efficiency Power Amplifier 2 x 30W into 8Ω or 1 x 60W into 4 Ω

GENERAL DESCRIPTION

The DDX-2050 power device is a monolithic dual channel H-Bridge that can provide up to 30 watts 

per channel of audio power at very high efficiency. The DDX-2050 power device  contains a logic interface, integrated bridge  drivers, high efficiency MOSFET output  transistors and protection circuitry. The device  may be used as a dual bridge or reconfigured as  a single bridge with double the output current  capability.  The benefits of the DDX amplification system are  an all-digital design that eliminates the need for a  digital to analog converter (DAC) and the high  efficiency operation derived from the use of  Apogee's patented damped ternary pulse width  modulation (PWM). This approach provides an  efficiency advantage over conventional Class-D  designs and up to three times the efficiency of  typical Class A/B amplifiers with music input  signals.

Mono High Efficiency Power Amplifier 60 Watt

Stereo High Efficiency Power Amplifier 2 x 30 Watt

60 W Quad Half-Bridge Digital Amplifier Power Stage

Features:
Configurable Outputs (10% THD+N)
– 2 x 30 W into 8 Ω, Full-Bridge
– 1 x 60 W into 4 Ω, Parallel Full-Bridge
– 4 x 15 W into 4 Ω, Half-Bridge
– 2 x 15 W into 4 Ω, Half-Bridge + 1 x 30 W 
into 8 Ω, Full-Bridge
 Space-Efficient, Thermally-Enhanced QFN 
Package
 PWM Popguard® Technology for Quiet Startup
 > 100 dB Dynamic Range - System Level
 < 0.12% THD+N @ 1 W - System Level
 Built-In Protection with Error Reporting
– Over-Current
– Thermal Warning
– Thermal Fault
– Under
Circuit Diagram:

60 W Quad Half-Bridge Digital Amplifier Power Stage

60W Hi-Fi Power Amplifier Circuit

Circuit Diagram:

60W Hi-Fi Power Amplifier Circuit

60W MOSFET Audio Amplifier

General Description:

• MPSA43 – NPN high voltage transistor with low current and high voltage used for telephony, professional communication equipment, and telephony, and is the complement type of MPSA93
• MJE350 – a plastic medium power PNP silicon transistor designed for use in line-operated applications such as low power, line-operated series pass and switching regulators requiring PNP capability with features of high collector-emitter sustaining voltage, excellent DC current gain, and plastic thermopad package
• IRFP240 – an N-channel enhancement mode silicon gate power field effect transistor with an advanced power MOSFET designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation used in applications such as switching regulators, switching converters, motor drivers, relay drivers, and drivers for high power bipolar switching transistors requiring high speed and low gat drive power due to features of high input impedance, linear transfer characteristics, nanosecond switching speeds, limited power dissipation, and single pulse avalanche energy rated

     The 60W MOSFET audio amplifier may be used in automotive sound systems, home theater entertainment systems, and audio-video receivers to continually improve the quality of the audio. redcircuits.com/Page100.htm

Circuit Diagram:

60W MOSFET Audio Amplifier

60W High Efficiency amplifier STA502

Circuit diagram 60W High Efficiency amplifier STA502

70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

Features

MULTIPOWER BCD TECHNOLOGY
VERY HIGH OPERATING VOLTAGE RANGE (±35V)
DMOS POWER STAGE
HIGH OUTPUT POWER (UP TO 60W MUSIC POWER)
MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
NO BOUCHEROT CELLS
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN

Circuit Diagram

Circuit Diagram for 70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

60W Hi-Fi AUDIO POWER AMPLIFIER WITH MUTE / STAND-BY TDA2052

Features

• SUPPLY VOLTAGE RANGE UP TO ±25V
• SPLIT SUPPLY OPERATION
• HIGH OUTPUT POWER
• (UP TO 60W MUSIC POWER)
• LOW DISTORTION
• MUTE/STAND-BY FUNCTION
• NO SWITCH ON/OFF NOISE
• AC SHORT CIRCUIT PROTECTION
• THERMAL SHUTDOWN
• ESD PROTECTION

Circuit Diagram

Circuit Diagram for 60W Hi-Fi AUDIO POWER AMPLIFIER

Subwoofer Amplifier Circuit 60W

Using the STK4038X audio amplifier IC, can be designed a very simple high power and efficiency audio power amplifier . This circuit is manufactured by Sanyo Corporation and will provide a output power of 60 watts on a 8 ohms load or 4 ohms load with 0.008% distortion . The output power that is provided by this audio IC , can be more higher , but with more distortion.If you will use a 8 ohms load you must power this audio amplifier project from a dual +/- 40 volts DC power supply and if you’ll use a 4 ohms load you must power this audio project form a dual +/- 33.5 volts DC power source. To prevent over heating the STK4038X audio power IC must be heatsinked on a good heatsink . Also you must use a very well filtered power supply ( a 10000uF capacitor will be fine for this audio project) .