Part Number:LM3481
Hello guys,
I have designed a flyback dc to dc converter using LM3481, Specifications are mentioned below;
Input supply: 9-30V
output supply: 5V
Output current: 500mA
switching frequency: 250KHz
There are 2 pins i.e. 1.feedback and 2.compensation in LM3481 which are useful to take feedback from secondary and control PWM accordingly.
I took reference from"www.ti.com/.../snvu528.pdf" -->"Figure 17. LM3481-FlybackEVM Schematic" to build this dc-dc converter.
My question is, this application note suggest to ground feedback pin and use compensation pin for feedback purpose but I don't understand how this feedback mechanism works?
If I use feedback pin instead I am not getting regulated 5V output.
Kindly help me out to understand why compensation pin is used and how it works and why feedback pin is not used.
Thanks.
Kindly help me out