In this circuit, it looks as if there is no feedback system to measure output voltage, so im wondering how they know when to boost the voltage or not like an actual buck boost converter.
Because there is no datasheet for the circuit i cannot tell you 100% how.... BUT, it can work using "open loop control". Knowing only input voltage you can adjust parameters of the system according to it. For example, you know that for 3 volts, duty cycle should be 0.5. So, when voltage increases to 3.05 V, for example, you decrease duty cycle to 0.49. And when voltage decrease to 2.95 V, you increase duty cycle. That is how it can be done using microcontroller. But, as a said, i do not know 100%. Maybe there is analogue circuitry inside with its specific control algorithms )
@@NickElectronics thanks for the reply, i was thinking the same since that's the only way left to get feedback with the help of the "mysterious IC". i don't know if its more practical or efficient though.
Subscribed. Thank you. Can you please tell a story on how you started tinkering with circuits? I am a beginner myself, and, frankly speaking, I have no idea how you guys get so clever 🤯
Thank you for such a nice comment! Actually, I have an electrical engineering education. 😅 But, as my professor once said, "Your experience is directly proportional to the number of devices you have burned." So the best way to learn electronics is to study some theory and then try implementing that knowledge. Good luck! :)
Should have been an easy circuit to review, but it was not )))
In this circuit, it looks as if there is no feedback system to measure output voltage, so im wondering how they know when to boost the voltage or not like an actual buck boost converter.
Because there is no datasheet for the circuit i cannot tell you 100% how.... BUT, it can work using "open loop control". Knowing only input voltage you can adjust parameters of the system according to it. For example, you know that for 3 volts, duty cycle should be 0.5. So, when voltage increases to 3.05 V, for example, you decrease duty cycle to 0.49. And when voltage decrease to 2.95 V, you increase duty cycle. That is how it can be done using microcontroller. But, as a said, i do not know 100%. Maybe there is analogue circuitry inside with its specific control algorithms )
@@NickElectronics thanks for the reply, i was thinking the same since that's the only way left to get feedback with the help of the "mysterious IC". i don't know if its more practical or efficient though.
@@Inti72600 You`re welcome!
I don`t believe engineers who designed it were thinking about efficiency, cause power is too low )
Subscribed. Thank you. Can you please tell a story on how you started tinkering with circuits? I am a beginner myself, and, frankly speaking, I have no idea how you guys get so clever 🤯
Thank you for such a nice comment! Actually, I have an electrical engineering education. 😅 But, as my professor once said, "Your experience is directly proportional to the number of devices you have burned." So the best way to learn electronics is to study some theory and then try implementing that knowledge. Good luck! :)
@@NickElectronics bless 🙏🏼