DocID024654 Rev 2

13/29

STNS01

Functional pin description

Figure 16. Shutdown mode entry and exit (not to scale, deglitch times not included)

Pin 5: CHG

Active-low open-drain charging/fault flag. This pin is active when the charging process is

ongoing and toggles at 1 Hz if a fault condition has been detected. Refer to

Table 8 for more

details. This pin is active only when a valid voltage is connected to the IN input (V

UVLO

< V

IN

< V

INOVP

).

Pin 6: CEN

Charger enable pin. A logic low level on this pin disables the battery charger. A transition

from high to low and then back to high restarts the charger when the charge cycle has been

stopped for one of the following reasons:

–

Charging timeout (pre-charge, fast-charge)

–

Battery voltage below V

PRE

after the fast-charge has already started

–

End of charge

The CEN pin has no effect if the charge cycle has been stopped for a battery overcharge

condition.

Device state

CHG pin state

Not charging

High Z

Charging

Low

Battery temperature fault

Toggling

Overcharge fault

Toggling

Charging timeout (precharge, fast charge)

Toggling

Battery voltage below V

PRE

after the fast charge starts

Toggling

AM10402v1

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Shutdown

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Shutdown

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Restart

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Shutdown

V

BAT

V

IN

SD

V

ODCR

V

ODC

V

INOVP

V

UVLO