Application circuit diagram of W296 with reset functions

Published:2011/5/5 7:16:00 Author:Nicole | Keyword: reset function | From:SeekIC

Compared with other switching regulator, W296 has a feature: internal reset function, when the regulator's output voltage produces reset signal within correct limits. The reset is achieved by the reset input side 12-pin, delayed side 13-pin and reset output side 14-pin. When the 12-pin voltage is lower than 5V, reset output is turned into low level by the comparator of resetting circuit; when the 12-pin voltage is higher than 5V, the reset output side turns into high level whichis delayed ashort period of time, the overtime is determined by the delay capacitor which is connected to 13-pin. The value of reset capacitor is between 1 ~ 4.7μF, when it is 2.2μF, the delay time is l00ms. The reset output side is a open collector, an external resistor is required when it is used. There are two ways, one is the 12-pin connects to output side directly, the other is to connect a resistor on input side, then divide to 12-pin, as shown. (a)connect output; (b)connect input.



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