Showing posts with label 100w. Show all posts
Showing posts with label 100w. Show all posts
Thursday, November 6, 2014
Monday, November 3, 2014
100W Audio Amplifier Transistor used BDW83D BDW84D circuit diagram
Here 100 watt power audio amplifier which using power transistor BDW83D and BDW84D. Copyright belong to Smart Kit. Schematic diagram:
Component part list:
R1 = 1,2 K D1 = 1N4002-7
R2 = 0,47 OHM D2 = 1N2002-7
R3 = 220 OHM D3 = 1N4148
R4 = 3,9 K D4 = 1N4148
R5 = 2,2 K D5 = 1N4148
R6 = 2,2 K D7 = 1N4148
R7 = 10 K D8 = 1N4148
R8 = 4,7 K Q1 = BDW84D
R9 = 150 OHM Q2 = BD829
R10 = 39 OHM Q3 = BC546
R11 = 3,3 K Q4 = BC556
Wednesday, September 3, 2014
100W MOSFET power amplifier
Circuit Description:
MOSFET power amplifier circuit based on IRFP240 and IRFP9240 MOSFETs is shown here. The amplifier operates from a +45/-45 V DC dual supply and can deliver 100 watt rms into an 8 ohm speaker and 160 watt rms into a 4 ohm speaker. This Hi-Fi amplifier circuit is suitable for a lot applications like general purpose amplifier, guitar amplifier, keyboard amplifier. The amplifier can be also used as a sub woofer amplifier but a subwoofer filter stage has to be added before the input stage. The amplifier has a low distortion of 0.1%, a damping factor greater than 200, input sensitivity of 1.2V and the bandwidth is from 4Hz to 4 KHz.
Circuit Features:
- Assemble the circuit on a good quality PCB.
- Use a +45/-45 V DC, 3A dual supply for powering the circuit.
- Power supply voltage must not exceed +55/-55 V DC.
- Before connecting the speaker, check the zero signal output voltage of the amplifier and in any case it should not be higher than 50mV. If it is higher than 50mV, check the circuit for any error. Replacing Q1, Q2 with another set could also solve the problem.
- Fit Q7 and Q8 to a 2°C/W heat sink. Both Q7 and Q8 must be isolated from the heat sink using mica sheets. Heat sink mounting kits for almost all power transistors/ MOSFETs of almost all package styles are readily available in the market.
- All resistors other than R10, R11 and R19 are 1/4 watt metal film resistors. R10 and R11 are 5W wire wound type while R19 is a 3W wire wound type.
Circuit Diagram:

Friday, August 15, 2014
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