29.10.2014

Power supply circuit diagram for 12v

This is the circuit diagram of 2000W class AB power amplifier uses 7 pairs MJ15003 and MJ15004 transistors for the final amplification block. Dear sir I am new bee to power amplifiers , can u please provide me PCB print design and how much power supply does it requires , I want to make amp for my village people …. Beside that, this transistor is very tough, I build myself, many years ago, a 300 Watts RMS on 4 Ohms load power amplifier that use 3 pairs at the output stage. Electrical engineering news, resources, electronic design projects, circuit diagrams and diy projects with schematic for students and hobbyist. This circuit may be used where a high current is required with a low ripple voltage (such as in a high powered class AB amplifier when high quality reproduction is necessary ). It’s very good to supply an power amplifier, because the capacitor it have high voltage. This 40V dual power supply circuit was designed in response to a request made by Michael from Philippines.
Hi Mounica you can use 100AHbattery for operating the UPS but it is not rated to charge it, hence you have use an external charger. Hi Adnan When you bridge two identical amplifiers into the speaker of same impedance, then it will give 4 times the rated power. Hi Adnan Use a power transistor like 2N3055 with 12 volt zener in the base collector circuit and connect collector emitter to filter capacitor. Regarding these power amplifiers they are not Class A type that is conuming constant current, but they are class B type hence as per volume their current requirement vary from few mA to few thousands of mA. Hi Adnan if by chance if the output is shorted or load takes higher current as per the capability of the trransformer then the rectifier will get destroyed.


With 12 amp transformer your short circuit dissipation of the trasistors are 1200 watts 600 at + and 600 at -. Hi Adnan please bear with me for few more days my desk top is down i am using my mini for just emails no graphics possible. Hi Adnan you can provide series pass transistors with its base being controlled by variable reference. Hi Adnan you have US$1000 in your account hence you can draw easily US$600 from your account. The regulator can be changed for 12 volt and also for 15 volt, which is maximum for the specified transformer.
I have also made power supplies using this method, virtually identical to your schematic, with one difference.
I did not have a 7809 regulator, but I have hundreds of 7805’s left from my old company. I solved this problem by using the 7805 in place of the 7809, but, I placed several rectifier diodes (of the 1N400X family, but others will work as well) in series with the 7805 GND (pin 2 in your schematic) pin, that is, between pin 2 and the negative side of the power supply.
These instructions are sketchy, I know, but perhaps someone will place more information here to show how it is done, as I don’t have anything which allows me to put a schematic here. Larry (I apologize if there are any errors; if I can help, contact me at lspeed1 at comcast dot net. Hi JHKNJ you can use center tapped transformer of minimum 12 0 12 or greater may be upto 18 0 18 with a good heat sink for the regulator IC, if you are likely draw higher current.
It is spe-cially designed for use with 2m handheld rigs with linear power amplifier and CB portable QRP rigs.


OUTPUT +5V-5V, 20 mile AMP power supply of plz send me the circuit diagram to my Email address. The 7809 is a 9 Volt voltage regulator IC with features such as internal current limit, safe area protection, thermal protection etc. The transistors must be mounted on heatsink to prevent the overheating, maintain the transistors work in maximum performance.
So, for a short period of time, the Vce will be equal to the addition of both, which means 155 V. Our website contains Free Collection of Electronics Circuits, PIC microcontroller projects, diagrams, tutorials, cad and PCB design software, vintage vacuum tube archives, hobby designs, datasheets and many schematics.
Minimum should be greater than 10.5 volt, hence use a standard heavy duty 12 volt transformer. If you are bad-lucky and you have some weak transistors, you can break down the emitter-collector junction…and destroy them. The transformer T1 steps down the mains voltage, bridge D1 performs the rectification, C1 and C2 does the job of filtering.C3 and C4 are decoupling capacitors.



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