BQ2058T Datasheet, PDF (2/18 Pages) Texas Instruments – Lithium Ion Pack Supervisor For 2-Cell Packs

bq2058T
Pin Descriptions
UVD
CHG
CTL
VSS
CSL
BAT2N
BAT_1N
DSG
Charge control output
This open-drain output controls the charge
path to the battery pack. Charging is allowed
when high.
Pack disable input
When high, this input allows an external
source to disable the pack by making both
DSG and CHG inactive. For normal opera-
tion, the CTL pin is low.
Low potential input
Overcurrent sense low-side input
This input is connected between the low-side
discharge FET (or sense resistor) and BAT_2N to
enable overcurrent sensing in the battery
pack’s ground path.
Battery 2 negative inputs (3 pins)
These pins are connected to the negative termi-
nal of the cell designated BAT2 in Figure 2.
Battery 1 negative input
This input is connected to the negative termi-
nal of the cell designated BAT1 in Figure 2.
Discharge control output
This push-pull output controls the discharge
path to the battery pack. Discharge is al-
lowed when high.
OVD
OCD
VCC
CSH
BAT1P
Undervoltage delay input
This input uses an external capacitor to V_CC
to set the undervoltage delay timing.
Overvoltage delay input
This input uses an external capacitor to VCC
to set the overvoltage delay timing.
Overcurrent delay input
This input uses an external capacitor to V_CC
to set the overcurrent delay timing.
High potential inputs (2 pins)
Overcurrent sense high-side input
This input is connected between the
high-side discharge FET (or sense resistor)
and BAT1P to enable overcurrent sense in
the battery pack’s positive supply path.
Battery 1 positive input
This input is connected to the positive terminal
of the cell designated BAT1 in Figure 2.
July 1997
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