UBA2007TKSLASHN2 datasheet(8/19 Pages) TI

8 / 19 page

2003 Oct 01

Philips Semiconductors

Product speciﬁcation

Charge switch

UBA2007

7.6

REVERSE mode

The REVERSE mode switch is activated when the

REVMOD input is pulled HIGH.

The current through the REVERSE mode switch is

monitored by the current limiting circuit. This current

limiting circuit reduces the drive voltage for the REVERSE

mode switch when the current exceeds the set current limit

resulting in a constant current behaviour of the REVERSE

mode switch.

When VBAT < 2.7 V the REVERSE mode is automatically

disabled and the UBA2007 returns to SHUTDOWN mode

(see Fig.3).

Remark: The dissipation inside the UBA2007 will increase

strongly when the current limitation is activated, this might

lead to activation of the thermal protection.

7.7

REVERSE and SLOW CHARGE mode

The REVERSE and SLOW CHARGE mode corresponds

to the SLOW CHARGE mode if a charger is connected to

pin CHG. When no charger is present, this mode is

equivalent to the REVERSE mode.

7.8

REVERSE and FAST CHARGE mode

The REVERSE and FAST CHARGE mode corresponds to

the FAST CHARGE mode if a charger is connected to pin

CHG. When no charger is present, this mode is equivalent

to the REVERSE mode. When the current flows from the

charger to the battery, the current limit can be adjusted

from 50 mA to 2 A, using the external resistor RRLIMF.

handbook, full pagewidth

MRC314

VBAT

(V)

REVERSE

mode

SHUTDOWN

mode

REVERSE

mode

>2.7 V

<3.1 V

hysteresis (VBAT(rev)(hys))

Fig.3 Reverse mode behaviour as a function of VBAT.

UBA2007TK/N2 Datasheet(PDF) 8 Page - Texas Instruments

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