whitemoustache
Newbie level 5
Hi
I read some books and papers, including Switching Power Supply Design ( by A.I.Pressman ) and Switching Power Supplies A to Z ( by S.Maniktala ) , but still puzzled.
Generally, those books and papers mention what need to consider in Freq Comp for a PWM system with an EA. However, most other cases are not mentioned, for example, PSM and PFM cases, EA works as a integrator...
R.W.Erickson's Fundamentals of Power Electronics contains more, but it does not mention so much about Freq Stab.
Is there any books discribe such a subject in detail ?
I wander what a system designer do when he is designing such a board. Does he calculate and abey some kind of rules, or just try and summary ?
Besides, I heard that some kind of systems need not Freq Compensation. For example, a PSM system with a Hys Comparator needn't that, and someone else says that an LED driver need not Freq Comp because it applies constant avg current ( I totally cannot understand this one ) .
Similarly, some chip datasheets declare that their system need not Freq Compensation Component at all ( for instance, iW3620 ). So what's the difference between them and other chips ?
Best Wishes and Thx:-D
I read some books and papers, including Switching Power Supply Design ( by A.I.Pressman ) and Switching Power Supplies A to Z ( by S.Maniktala ) , but still puzzled.
Generally, those books and papers mention what need to consider in Freq Comp for a PWM system with an EA. However, most other cases are not mentioned, for example, PSM and PFM cases, EA works as a integrator...
R.W.Erickson's Fundamentals of Power Electronics contains more, but it does not mention so much about Freq Stab.
Is there any books discribe such a subject in detail ?
I wander what a system designer do when he is designing such a board. Does he calculate and abey some kind of rules, or just try and summary ?
Besides, I heard that some kind of systems need not Freq Compensation. For example, a PSM system with a Hys Comparator needn't that, and someone else says that an LED driver need not Freq Comp because it applies constant avg current ( I totally cannot understand this one ) .
Similarly, some chip datasheets declare that their system need not Freq Compensation Component at all ( for instance, iW3620 ). So what's the difference between them and other chips ?
Best Wishes and Thx:-D