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Old 9th September 2013, 10:14 PM   #1
bimo is offline bimo  Indonesia
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Default VSSA FOR HEADPHONE

Hi, all. I just learn how to use LTSPICE and I want to modify VSSA for headphone amplifier.
Here, my schematic diagram. I use +15V,0,-15V power supply and approximately 100mA for quiescent current output transistor. The simulation is good. But I want suggestions from the experts if I miss something here.
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File Type: asc vssa bjt_headphone.asc (11.3 KB, 54 views)
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Old 10th September 2013, 02:03 AM   #2
DUG is offline DUG  Canada
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1.5W power dissipation for each output power transistor.

Transistors rated for 12.5W @ Tc of 25C
or 1.25W at Ta of 25C

Heat sink is required.

Just in case you forgot.

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Old 10th September 2013, 02:06 AM   #3
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by DUG View Post
1.5W power dissipation for each output power transistor.

Transistors rated for 12.5W @ Tc of 25C
or 1.25W at Ta of 25C

Heat sink is required.

Just in case you forgot.

Thank you, Dug. I will remember it
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Old 16th September 2013, 10:51 PM   #4
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I have +/- 15V VSSA original 6-transistor circuit running. It puts out 4.8 vrms before clipping.
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Old 17th September 2013, 01:42 AM   #5
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by woofertester View Post
I have +/- 15V VSSA original 6-transistor circuit running. It puts out 4.8 vrms before clipping.
I think 2sj162 and 2sk1058 lateral mosfet is too much and too expensive for headphone amplifier. I made VSSA with lateral mosfet for my 8 ohm speaker.
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