Schematic Rise

Showing posts with label watt. Show all posts

Saturday, November 15, 2014

60 WATT AMPLIFIER CIRCUIT

STK4038 is an integrated AF power amplifier that can deliver 60 watts of output power into a 4 ohm load. The internal fixed current circuitry reduces switch ON/OFF clicks. The IC supports the addition of external circuits for thermal shutdown, pop noise reduction, output short circuit protection etc. This circuit is based on datasheet and it includes a Zobel network ( called filter section ) which improves the high frequency stability of the amplifier.

The 60 watt amplifier shown below is designed based on the datasheet and performs very well. Capacitor C1 is the input DC decoupling capacitor which blocks any DC level present in the audio input and C12 is the input by-pass capacitor. R1 is the input resistor.C10 and C8 are the ripple filter capacitors for the positive and negative power supply rails. R9 and R7 are the current limiting resistors for the internal driver stage while C11 and C3 are their corresponding filter capacitors. Resistor R6 feeds back a portion of the output signal to the inverting input (pin2). Gain of the amplifier depends on the value of R6. C9 and R2 forms a Zobel network which improves the high frequency stability of the amplifier.

Circuit Diagram

Points to Remember

A good quality PCB improves the performance of the circuit.
Maximum supply voltage for STK4038 is +/- 57V DC.
K1 is a 4 ohm / 75 watt loud speaker.
While using 4 ohm speaker as the load, the power supply must not exceed +/- 32V DC.

Wednesday, November 5, 2014

High Voltage 3 Watt Audio Power Amplifier

The LM4954 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 2.4 Watts of continuous average power to an 8

BTL load with less than 1% THD+N from a 7V_DC power supply. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal number of external components. The LM4954 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for lower-power portable applications where minimal space and power consumption are primary requirements.

High Voltage 3 Watt Audio Power Amplifier Circuit Diagram

The LM4954 features a low-power consumption global shutdown mode which is achieved by driving the shutdown pin with logic low. Additionally, the LM4954 features an internal thermal shutdown protection mechanism.

The LM4954 contains advanced pop & click circuitry which eliminates noises that would otherwise occur during turn-on and turn-off transitions.

The LM4954 is unity-gain stable and can be configured by external gain-setting resistors.

Key Specification:

Wide Power Supply Voltage Range	2.7 <= VDD <= 9V
Output Power: VDD = 7V, 1% THD+N	2.4W (typ)
Quiescent power supply current	3mA (typ)
PSRR: VDD = 5V and 3V at 217Hz	80dB (typ)
Shutdown power supply current	0.01µA (typ)

Features:

No output coupling capacitors, snubber networks or bootstrap capacitors required

Unity gain stable

Externally configurable gain

Ultra low current active low shutdown mode

BTL output can drive capacitive loads up to 100pF

"Click and pop" suppression circuitry

2.7V - 9.0V operation

Available in space-saving microSMD package

Applications

Mobile Phones

PDAs

Friday, October 31, 2014

300 Watt MOSFET Broadband Amplifier Using MRF141G

The following segment will provide the enhanced Motorola schematic for any typical application for the MRF141G (which includes parasitic stabilization features), a broadband power RF MOSFET which will place out a conservatively-rated 300 watts across the FM broadcast band. The flange about the MRF141G ought to be mounted to a heat spreader, a copper plate 5/16" thick and 6" x 8", which is then mounted to the heatsink with 6-32 machine screws, if your heatsink is drilled and tapped.

I recommend getting the two transformer assemblies, instead of trying to create them, due to the fact 15-ohm hardline is not straightforward to come across.

Monday, October 27, 2014

TDA2030 bridge 35 watt power amplifier Diagram Circuit

A very simple 35 watt power amplifier electronic project can be designed using the TDA2030 power audio IC. The TDA2030A is a monolithic IC in Pentawatt package intended for use as low frequency class AB amplifier.
The TDA2030A provides high output current and has very low harmonic and cross-over distortion. TDA2030 ICs connected in bridge mode.
This circuit require few external electronics parts and supports a 8 ohms load . This 35 watt power amplifier require a very good filtered DC power supply , that will provide an output voltage of +/- 16 volts .

Using this circuit you can design a very simple and efficiency subwoofer amplifier with a maximum output power of 35 watt power .
The device incorporates a short circuit protection system comprising an arrangement for automatically limiting the dissipated power so as to keep the working point of the output transistors within their safe operating area. Also a conventional thermal shut-down system is also included .
However a heatsink must be used for the TDA2030 bridge circuit but for any reason, if the junction temperature increases up to 150oC, the thermal shut-down simply reduces the power dissipation and the current consumption.

LM4765 2 x 30 watt amplifier Diagram Circuit

A very simple 2 x 30 watt amplifier electronic circuit project can be designed using the LM4765 stereo audio amplifier IC capable of delivering typically 30W per channel of continuous average output power into an 8Ω load with less than 0.1% THD+N.
This 2 x 30 watt amplifier electronic circuit is very simple and require few external electronic parts and can be used in high end stereo TVs or some other audio applications .
Each amplifier has an independent smooth transition fadein/out mute and a power conserving standby mode which can be controlled by external logic.
Like many other audio amplifier ICs the LM4765 has many features like Temperature protection circuitry, SPiKe protection ( means that these parts are safeguarded at the output against overvoltage, undervoltage, overloads, including thermal runaway and instantaneous temperature peaks).
This audio amplifier electronic circuit project can be powered from a wide input voltage range from 20 volt up to 66 volts , but typically is required a dual 28 volts input ( take care because |Vcc|+|Vee|<60 volts .

The LM4765 has a sophisticated thermal protection scheme to prevent long-term thermal stress of the device. When the temperature on the die reaches 165°C, the LM4765 shuts down. It starts operating again when the die temperature drops to about 155°C, but if the temperature again begins to rise, shutdown will occur again at 165°C.
The audio IC must be mounted on a heat sink to keep the die temperature at a level such that the thermal protection circuitry does not operate under normal circumstances.
In this circuit diagram is represented just a part of the IC (one channel ) and numbers in parentheses represent pinout for amplifier B

Friday, October 17, 2014

7 Watt Audio Power Amplifier Circuit Schematic

This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The TDA 2003 has improved performance with the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low number of external components, ease of assembly, space and cost saving, are maintained. The device provides a high output current capability (up to 3.5A) very low harmonic
and cross-over distortion. Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground. A conventional direct current can be connected as supply.

Circuits picture:

Front View of 7 Watt Audio Power Amplifier

Circuit diagram:

7 Watt Audio Power Amplifier Circuit Diagram

Parts:

R1 = 470R
R2 = 47R
R3 = 100R
R4 = 1R
C1 = 1822pF
C2 = 100nF-63V
C3 = 100nF-63v
C4 = 10uF-25V
C5 = 470uF-25V
C6 = 1000uF-35v
C7 = 1000uF-35V
IC1 = TDA2003

Specifications:

Music power output: 7W / 4ohm
RMS output: 3.5W / 4ohm or 2W / 8ohm
Total harmonic distortion: 0.05% (1W / 1kHz)
Frequency response: 20Hz to 20kHz (-3dB)
Signal/noise ratio: 86dB (A weighted)
Input sensitivity: 40mV / 150Kohm
Overload and short-circuit protected
Supply voltage: 15V DC (8 to 18V DC possible) / 0.5A
Dimensions: 2.2 x 1.4"

Wednesday, October 15, 2014

Build a 70 Watt OCL Amplifier Circuit Diagram

OCL power amplifier circuit used in the circuit above is the type of power amplifier OCL (Output Capacitor Less) with a power output of 70 Watt. Circuit 70 Watt power amplifier OCL is working on a class AB with symmetrical voltage source of VCC ± 25 volts DC to ± 32 volts DC. OCL power amplifier circuit uses a 70 watt power transistor complementary transistor TIP in 2955 and TIP 3055. 70 watt power amplifier in the circuit can be used to drive the load (4-16 Ohm loudspeaker). Power supply circuit power amplifier can use power supply circuit with current 5A symmetrical. For stereo audio system needs to make a power amplifier OCL circuit tone control + over 2 units.

70 Watt OCL Amplifier Circuit Diagram

Monday, October 13, 2014

STA575 200 watt stereo power audio amplifier circuit

This power audio amplifier electronic project is based on the STA575 fully integrated power module designed to implement a BASH® amplifier when used in conjunction with STABP01 digital processor. This power audio amplifier electronic project is based on the STA575 is capable to provide a maximum 100 watts output continuous power per channel ( on two channels ) on a 4 or 8 ohms load . The circuit contains all the blocks to build a stereo amplifier. Each single channel is based on the Output Bridge Power Amplifier, and its protection circuit.

STA575 power audio amplifier can be set in three states by the Stby/mute pin: Standby ( Vpin <0.8v), mute (1.6v 4V).
In the Standby mode all the circuits involved in the signal path are in off condition, instead in Mute mode the circuits are biased but the Speakers Outputs are forced to ground potential.
These voltages can be get by the external RC network connected to Stby/Mute pin.
The same block is used to force quickly the I.C. In standby mode or in mute mode when the I.C. dangerous condition has been detected.
The protection of STA575 power audio amplifier are implemented by the Over Temperature, Unbalance .
The Output bridge amplifier makes the single-ended to Differential conversion of the Audio signal using two power amplifiers, one in non-inverting configuration with gain equal to 2 and the other in inverting configuration with unity gain.

To protect the output transistors of the power bridge a power detector is implemented .
To power this 200 watt stereo power audio amplifier you’ll need a DC power source that will provide the following output voltages : Vs+ = 28V, Vs- = -23V, VCD+ = 20V, VCD- = -20V and you’ll need a 8 ohms load .
In the table bellow you can see values for electronic parts required by this 200 watt stereo power audio amplifier electronic project .

Thursday, September 18, 2014

7 Watt Audio Amplifier Using TDA2003

Amplifier Circuits Diagram

Schematic diagram of a simple 7 watt audio amplifier using TDA2003 Amplifier IC. This is a good IC with many built in features like low harmonic distortion, short schema protection,thermal overload protection etc. This IC is a upgrade version of TDA 2002 amplifier IC.

7 Watt Audio Amplifier Circuit Diagram :

7W-audio-amplifier-schema-Diagram

The schema is small and using only few components and it is able to deliver 7w output on 12V DC. Assamble the schema on PCB or veroboard and use heatsink with IC. Input voltage can be between 8 to 18 volt / 0.5A DC.

Monday, August 25, 2014

60 Watt Subwoofer Amplifer Circuit

THis is very nice amplifier circuit , because High output , and voltage required is also not too large, and suitable for th subwoofer speaker.This circuit use IC TDA1102 , Minimum require voltage 6 volt and maximum voltage 16 volt with impedance 4 ohm . This circuit perfect those of you wear the speakers subwoofer especially in the small room , like in the car. See circuit subwoofer below :

OCL 150 Watt with 2N3055 and MJ2955

This is OCL 150 W mono audio amplifier circuit , with impedance 8 Ohms. The supply voltage using 25 volt DC with triple voltage + ,- ,ground. see below this circuit :
Buffer amplifier use PNP transistor is A564 / A733 /A1013 and NPN use D400 / D438. Driver Amplifier use NPN transistor is TIP31 / TIP41 / D401, and PNP transistor use TIP32 / TIP42 / B546. For the transistor booster or end , here I use a 2 x 20355 and MJ2955 . This anplifier is recomended to full range speakers. See pcb line and construction audio amplifier below :

Click to view larger

PCB line

Components are already installed

The booster amplifier already installed.

Friday, August 15, 2014

Build a 3 Watt Stereo Amplifier Wiring diagram Schematic

Build a 3 Watt Stereo Amplifier Circuit Diagram. This schema using MAX 7910 IC. The MAX9710 a stereo audio power amplifier IC capable of delivering 3Watts of out put to 4 Ohm loads. MAX9710 can be operated from a single 4.5V to 5.5V power supply , makes it ideal for hand held applications.The IC for

3 Watt stereo amplifier schema also features thermal overload protection.

3 Watt Stereo Amplifier Circuit Diagram

This 3 Watt stereo amplifier schema is suitable for small power audio devices such as radio sets and portable CD players. 5 V DC power supply is used for powering the 3 Watt stereo amplifier schema. 6V battery with an IN 4007 diode series to the positive terminal of it can also be used instead of 5 V DC supply. The 3 Watt stereo amplifier schema will get a supply voltage approximately 5 V after 0.7 V voltage drop across diode.

Tuesday, August 12, 2014

22 Watt Stereo Amplifier

This schema is very basic to build and puts out great power for your car or home. Keep all leads as short as possible

22 Watt Stereo Amplifier schema diagram