belax
Member level 2
Hello,
I am building a fly back DC-DC converter based on UC2843BN (8pin-version).
The DC input will be from 10V to 27 V.
The DC-out 5V.
I have question about supplying the UC2843.
If I directly connect VCC pin to DC-input, my MOSFET Gate-To-Source will exceed its maximum value of 16 Volts, when the DC-input is above 16-17 volts.
I decided to build a series emitter voltage regulator, which should keep it’s voltage around 12.4 Volts when the DC-input is grater than ~14 volts and should keep its voltage almost equal to DC-input when the DC-input less than 14 volts.
I would like to ask if this UC2843-supply scheme is stable and reliable for my application? And also, would like to ask if there another typical solution of powering UC2843, when the DC-input in the range from 10 to 27 volts.
Thank you.
I am building a fly back DC-DC converter based on UC2843BN (8pin-version).
The DC input will be from 10V to 27 V.
The DC-out 5V.
I have question about supplying the UC2843.
If I directly connect VCC pin to DC-input, my MOSFET Gate-To-Source will exceed its maximum value of 16 Volts, when the DC-input is above 16-17 volts.
I decided to build a series emitter voltage regulator, which should keep it’s voltage around 12.4 Volts when the DC-input is grater than ~14 volts and should keep its voltage almost equal to DC-input when the DC-input less than 14 volts.
I would like to ask if this UC2843-supply scheme is stable and reliable for my application? And also, would like to ask if there another typical solution of powering UC2843, when the DC-input in the range from 10 to 27 volts.
Thank you.