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(MC34063) 5v to 9v and 12 volts ouput

Offline Brilliantes

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(MC34063) 5v to 9v and 12 volts ouput
« on: February 13, 2020, 11:25:09 AM »
Good Day uli mga Masters



Paano po kaya malalagyan ko ng 9v output nang hinde gumagamit ng 7809 voltage regulator?
Pwedi po kaya ang series ng diode?

Balak ko pong gawin may two ang output niya 9v at 12v.

Thanks po ng marame...
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Re: (MC34063) 5v to 9v and 12 volts ouput
« Reply #1 on: February 13, 2020, 02:40:06 PM »
Adjustable ang output nyan boss,,yan ang purpose nung trimmer nya na 1K sa feedback,see diagram. kung di maabot ang desired output na 9 volts pwede mo i-modify yang feedback resistor.

Offline Brilliantes

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Re: (MC34063) 5v to 9v and 12 volts ouput
« Reply #2 on: February 13, 2020, 06:09:14 PM »
:) thanks po
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Offline >>>^żżż^<<<

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Re: (MC34063) 5v to 9v and 12 volts ouput
« Reply #3 on: February 14, 2020, 12:14:10 AM »
consult datasheet at application notes nandun iyan adjstable iyan
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Offline zirlou21

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Re: (MC34063) 5v to 9v and 12 volts ouput
« Reply #4 on: February 14, 2020, 12:37:48 AM »
 :D :D :D

...kung two output voltage need mo
ndi pwd sabay na makuha sa ckt mo.
ang trimmer ay para iset sa
one fixed output voltage lamang.
kung low ampere lang need mo para sa 9volts
gamit ka na lang 78L09
TO-92 package..
...NO OFFENSE pls..usapang teknikal lang,walang personalan.....

Offline motion55

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Re: (MC34063) 5v to 9v and 12 volts ouput
« Reply #5 on: February 14, 2020, 11:04:04 AM »
Too bad boost converter. The output voltage is dependent on the input voltage. So assuming the input is 5V, then the L1 forward voltage is 12-5 = 7V at the output of 12V.  You can add a secondary coil with turns ratio of 9:7 to get about 9V. The diode forward drop is ignored.

So kung kaya bilangin ang turns ng L1, then add a 2nd  coil of wire wrapped to the same core. By a turns ratio of about 9:7, kung say 35 turns ang count ng L1, then wrap 45 turns to get 9V. Connect one end of the 2nd coil to GND and the other one to a fast rectifier diode. Of course add a capacitor to filter the ripple. For proper operation, take note of the polarity of the windings (the dots).

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