12W audio amplifier | Electronic Schematic Diagram https://electronicscheme.net Schematic Diagram & PCB Design Sun, 13 Dec 2015 13:58:50 +0000 en-US hourly 1 https://i0.wp.com/electronicscheme.net/wp-content/uploads/2017/05/cropped-transparent_text_effect.png?fit=32%2C32&ssl=1 12W audio amplifier | Electronic Schematic Diagram https://electronicscheme.net 32 32 129969089 12W Audio Amplifier based MOSFET 2SK135 / 2SJ50 https://electronicscheme.net/12w-audio-amplifier-mosfet-2sk135-2sj50/?utm_source=rss&utm_medium=rss&utm_campaign=12w-audio-amplifier-mosfet-2sk135-2sj50 https://electronicscheme.net/12w-audio-amplifier-mosfet-2sk135-2sj50/#respond Sun, 13 Dec 2015 13:54:42 +0000 http://electronicscheme.net/?p=3644 This is a small 12W audio amplifier over a load of 8 Ω, that combining the NE5534 integrated with a pair of V-MOSFET transistor output […]

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This is a small 12W audio amplifier over a load of 8 Ω, that combining the NE5534 integrated with a pair of V-MOSFET transistor output stage technology as we get excellent sound performance. MOSFET 2SK135 / 2SJ50 from Hitachi is used in this circuit. Input sensitivity of the circuit is 3V RMS maximum, the distortion factor is 0.002% at 1 kHz, and the frequency response is 15 Hz to 100 kHz. (-3dB).

This circuit requires a symmetrical (dual polarity) power supply with voltage output +/- 25V and the current output should be 2A maximum.

12W Audio Amplifier Components List:

R1 = 33 kΩ C1 = 1nF 63V D1 = 1N967B zener 18V 0.5W
R2 = 6.8 kΩ C2 = 47 ?uF 40V D2 = 1N967B zener 18V 0.5W
R3 = 22 kΩ C3 = 100 nF 63V D3 = 1N4148
R4 = 100 kΩ C4 = 100 nF 63V D4 = 1N4148
R5 = 1 kΩ C5 = 47 ?uF 40V Q1 = 2SK135 MOSFET
R6 = 330 Ω C6 = 4.7 pF ceramic Q2 = 2SJ50 MOSFET
R7 = 1 kΩ C7 = 100 ?uF 40V IC1 = NE5534
R8 = 10 kΩ C8 = 100 ?uF 40V
R9 = 0.47 Ω 2W
R10 = 0.47 Ω 2W
R11 = 10 kΩ

Power Supply Specification:
Voltage: Symmetrical 25V
Current : 1A – 2A Max

MOSFET 2SK135 and 2SJ50 Datasheet Downloads:

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SK133, SK134, SK135 Datasheet

1 file(s) 192.12 KB
Download

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2SJ48, 2SJ49, 2SJ50 Datasheet

1 file(s) 193.15 KB
Download

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