.
Thanks , you can show me that . Maybe i have some mistake
Regards
Thienchay,
Do yuo also have DIY files for the 12v bias regulator of IRS900D?...
thanks!
Yeah , i used LM317 for 1 Channel .Thienchay,
Do yuo also have DIY files for the 12v bias regulator of IRS900D?...
thanks!
This my Layout and PDF file
Regards
Attachments
You can see all Information of LM317 in datasheet , Vout = Vref (1 + R1 / R2) + I adj R2 .Thienchay,
Do you have the schematic? what was the appropriate values of R1 & R2?..
Andrew,
Can you post the construction details for 100uh inductor?
Thank you guys!
You can calculate in this site : LM317 / LM338 / LM350 Voltage and Current Regulator Calculators
Hi
+ (12V) on Regulator Board connect to +12V on Power board
.... and - (GND) on Regulator Board connect to COM (V-) on Power Board .
GND of Regulator must be connect to V- on Power Board .
Digital deadtime no,but effective analog deadtime may vary somewhat with this schematic ,you have to measure with the scope.does dead time vary with voltage ? as in the more high voltage you use the more you have to adjust dead time.?
But with increased voltage , switching disipasion increases also , and you should adjust deadtime at maximum used voltage for lowest THD possible and maneable disipation.
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thanks,,,Thienchay
its negative referred....i have etch the pcb of the design which u provided...can u tell me the value of the resistor RSS and osc and also RFB....i need to know the inductance of output coil
Yeah .
- RSS dependent of rail voltage you used , you can calculate it , RSS = (Volt - V(zener) / 0,01 (set 10mA passing RSS) .
+ EX : If you used +/- 75V ; RSS = (75 - 5,6) / 0,01 = 6940 , so you should used 6,8K ohm / 2W
- RFB = 100K , OSC = 1K , it set Gain .
- OCP = (V bias x R ocp / 6800 ) / R (Source MOSFET) . Set limit of output current .
+ EX : I used 12V Bias , R ocp = 220 ohm , R (Source) = 0,02 ohm ( 5 x 0,1 ohm parallel)
(12 x 220 / 6800) / 0,02 = 19,4 Ampe
Change R ocp is change limit output current .
- L output ~ 30 - 40 uH .
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Hi Thienchay,what output mosfet can i use for +/-80V ? i was thinking at IRFB5620 (25nC gate charge) because they are class d mosfets and they are easy to drive at high speed without overheating the driver IR2110.I build a CHE900 and with IRFP4227 and 1k at oscilator i had 500Khz oscilation but the IR2110 was very hot 60-65 degrees,so i change the R OSC at 470R and got exactly 300Khz IR2110 only 40 degrees but the sound on high's was a little under the veil like something was missing.
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ok. thanks for the information. never knew how to change the oscillation frequency in that design before.