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Old 16th August 2012, 11:54 AM   #2301
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when i apply function generator with input frequency of 1KHZ it give output of 3KHZ ......why is that so???????????
any feedback would be highly appreciated
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Old 16th August 2012, 03:55 PM   #2302
manojtm is offline manojtm  India
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Hi ALL
Any class D amp design "high important side is level shifter" if it is not good your amp will generate noise,sparking sound etc...

all schematic shows some mistake ...........

If your design analog side voltage is 5V you should provide level shifter same and IR2110 pin 9 should be 5V. PIN 3 you can change 12V or 15V

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MANOJ
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Old 16th August 2012, 03:56 PM   #2303
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after the 6k8 resistor on the positive side(+5.6V)in series,just cut the copper and place the resistor on it.
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Old 16th August 2012, 04:00 PM   #2304
CPX is offline CPX  Romania
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Quote:
Originally Posted by manojtm View Post
Hi ALL
Any class D amp design "high important side is level shifter" if it is not good your amp will generate noise,sparking sound etc...

all schematic shows some mistake ...........

If your design analog side voltage is 5V you should provide level shifter same and IR2110 pin 9 should be 5V. PIN 3 you can change 12V or 15V

Regards
MANOJ
If level shifter is not good the amplifier will not work at all..,or something will get very hot quick.
What mistake have you found in my schematics?
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Old 16th August 2012, 04:08 PM   #2305
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Originally Posted by CPX View Post
If level shifter is not good the amplifier will not work at all..,or something will get very hot quick.
What mistake have you found in my schematics?
nothing is hot....but output is distorted.....when applied input of 1KHZ it gives output of 3KHZ
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Old 16th August 2012, 04:12 PM   #2306
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Quote:
Originally Posted by manojtm View Post
Hi ALL
Any class D amp design "high important side is level shifter" if it is not good your amp will generate noise,sparking sound etc...

all schematic shows some mistake ...........

If your design analog side voltage is 5V you should provide level shifter same and IR2110 pin 9 should be 5V. PIN 3 you can change 12V or 15V

Regards
MANOJ
yes there is much noise on outputs but i dint find any source saying this voltage variations
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Old 16th August 2012, 04:12 PM   #2307
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Hi CPX please share your schematic,thank's a lot
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Old 16th August 2012, 04:13 PM   #2308
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Originally Posted by don2007ksa View Post
after the 6k8 resistor on the positive side(+5.6V)in series,just cut the copper and place the resistor on it.
what diff will it make...as it will be in supply???????/
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Old 16th August 2012, 04:37 PM   #2309
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this resistor make's the voltage to drop a few m.volt along with the current that goes to the load (TLO71) and the result's temperature,voltage stabilization.
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Old 16th August 2012, 05:22 PM   #2310
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when i apply function generator with input frequency of 1KHZ it give output of 3KHZ ......why is that so???????????
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