Dear Dennis...
EN-Genius Network's Dennis Feucht answers your design
queries in his new Circuit Design Clinic!
July, 2007
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EN-Genius Network presents a new, interactive
analog design service to readers! Send us your design questions (with
relevant data; schematics in JPEG or GIF, please) for some free
engineering advice from EN-Genius Network's circuit
consultant, Dennis Feucht, on how you might solve a design problem or
improve circuit performance. Submissions may be edited for clarity or
brevity, and submitters and their email addresses will remain anonymous
(unless otherwise indicated). Please send your questions to Dennis here.
Commodity IC Data: SG3525A
by Dennis L. Feucht
Q: I am having trouble doing detailed design of analog circuits for low-cost products using commonly-available ICs. In particular, the SG3525A PWM controller, popular for push-pull converter designs, lacks some useful design data, such as the transfer function of the error amplifier. Can you provide some of this information?
A: Some SG3525A PWM IC missing data is not really missing but can be hard to find.
...download complete article here (235 KB PDF)
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