MP26121 – +28V, 1A Li+ Linear Batt Charger with Flexible NTC Interface

MP26121 Rev. 0.9

www.MonolithicPower.com

9

9/15/2008

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Under full charge conditions, certain systems

may draw a very narrow current pulse that

exceeds the IBF threshold. The CHG indicator

may glitch. It is desirable to blank the

CHG glitch

so that the system can properly indicate full

charge conditions to the user. A simple solution

is to add a RC filter on the CHG pin to filter out

the possible

CHG glitch, as shown in Figure 4.

Figure 4—Filtered Charge Status with GPIO Connection

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