quaternion
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ASA
I wanted to make a voltage booster in order to power up some projects that need more than 9V supply with only 9V battery.
I searched in local market for chips that make voltage boost but I didn't find any.So ,I decided to build it my self.I did make a fly-back sps but the output current was very low.I decided to make a boost sps in order to decrease loss of more components.I searched the web a little and found some threads among them i found this
12V To 24V DC-DC Converter Circuit
I start to simulate and notice unstable behavior and not easy analyzed.So I modified it in order to make it in a form that I can understand.
And at last ,I implemented the attached circuit.
The problem is that I can't get from it more than 400mWatt(20V,20mA using 1Kohm load).
I did tuned the loop gain varing the feedback resistors but it seems more or less open loop gain decrease the output power in addition to that i can't use small resistors in order not to dissipate more power nor i can use large resistors in 1M range in order not to have currents comparable with op amp biasing ones.
I want to get max 1Watt from a regulated output
I appreciate any help, thanks in advance.
-I hope that the topic is in place ,I wanted to put it in Hobby Circuits and Small Projects Problems forum -
I wanted to make a voltage booster in order to power up some projects that need more than 9V supply with only 9V battery.
I searched in local market for chips that make voltage boost but I didn't find any.So ,I decided to build it my self.I did make a fly-back sps but the output current was very low.I decided to make a boost sps in order to decrease loss of more components.I searched the web a little and found some threads among them i found this
12V To 24V DC-DC Converter Circuit
I start to simulate and notice unstable behavior and not easy analyzed.So I modified it in order to make it in a form that I can understand.
And at last ,I implemented the attached circuit.
The problem is that I can't get from it more than 400mWatt(20V,20mA using 1Kohm load).
I did tuned the loop gain varing the feedback resistors but it seems more or less open loop gain decrease the output power in addition to that i can't use small resistors in order not to dissipate more power nor i can use large resistors in 1M range in order not to have currents comparable with op amp biasing ones.
I want to get max 1Watt from a regulated output
I appreciate any help, thanks in advance.
-I hope that the topic is in place ,I wanted to put it in Hobby Circuits and Small Projects Problems forum -