Typical application circuit of intelligent temperature controller MAX6641 based on SMbus

Published:2011/9/8 8:09:00 Author:Felicity | Keyword: intelligent temperature controller | From:SeekIC

Typical application circuit of MAX6641 is shown in the figure. Using the PWMOUT terminal to drive N-MOSFET and to control the rotational speed of the pan. Remote PN junction temperature sensor can be replaced by the emitter of the triode inside micro processor (μP). Discrete component triode as CMPT3906、T3906、KST3906-TF、SMBT3906 etc. can also be adopted. Under the highest expected temperature and 10μA current the forward voltage drop of the emitter shall above 0.25V ; Under the lowest expected temperature and 100μA current the forward voltage drop of the emitter shall above 0.95V. High power triode shall not be adopted.



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