Hi all,
I have a new project with me now. It requires me to design and build several dc/dc converters such as boost, buck and cuk...
I have read some relevant threads available in this site, and it did provide me the necessary information I need...but I still have some doubts over here, so please help. Thanks a lot.
Starting with the boost converter...I will use microcontroller to generate a signal with high frequency and adjustable duty cycle to a N-type MOSFET for switching boost converter. The MOSFET I use is IRF540N and I also use a MOSFET driver (IR2110) in between the microcontroller and MOSFET to step up the switching voltage. Based on the IRF540N datasheet, it requires 10V voltage supplied to the gate in order to fully drive the chip. The voltage generated out from the microcontroller is 5V, thus a mosfet driver was used. but, I wonder how am I going to fully on the mosfet when I adjust the duty cycle of the pwm signal generated from the microcontroller??
From my understanding, the pwm signal will be varied from 0V to 5V if I adjust the duty cycle from 0% to 100% (Is this concept wrong?). So, if the mosfet driver boost the voltage up to 10V at 5V pwm signal, then what will the mosfet driver output when the pwm signal is below 5V?? And if the voltage to the mosfet is below 10V, will it still work well??
The IR2110 mosfet driver has low input, low output and high input, high output The input voltage I will use in my boost converter is <=12V. So, I just need to use the low I/O pins right for my application right? If yes, then how should I connect the pins of High I/O and its relevant supply and com pins?? Can I just leave the pins floating or do I need to ground them all.
Please advice. Thank you very much
Regards
I have a new project with me now. It requires me to design and build several dc/dc converters such as boost, buck and cuk...
I have read some relevant threads available in this site, and it did provide me the necessary information I need...but I still have some doubts over here, so please help. Thanks a lot.
Starting with the boost converter...I will use microcontroller to generate a signal with high frequency and adjustable duty cycle to a N-type MOSFET for switching boost converter. The MOSFET I use is IRF540N and I also use a MOSFET driver (IR2110) in between the microcontroller and MOSFET to step up the switching voltage. Based on the IRF540N datasheet, it requires 10V voltage supplied to the gate in order to fully drive the chip. The voltage generated out from the microcontroller is 5V, thus a mosfet driver was used. but, I wonder how am I going to fully on the mosfet when I adjust the duty cycle of the pwm signal generated from the microcontroller??
From my understanding, the pwm signal will be varied from 0V to 5V if I adjust the duty cycle from 0% to 100% (Is this concept wrong?). So, if the mosfet driver boost the voltage up to 10V at 5V pwm signal, then what will the mosfet driver output when the pwm signal is below 5V?? And if the voltage to the mosfet is below 10V, will it still work well??
The IR2110 mosfet driver has low input, low output and high input, high output The input voltage I will use in my boost converter is <=12V. So, I just need to use the low I/O pins right for my application right? If yes, then how should I connect the pins of High I/O and its relevant supply and com pins?? Can I just leave the pins floating or do I need to ground them all.
Please advice. Thank you very much
Regards