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Direct connection for series battery terminals
Measures 1.70 X 0.70 inches
Low standby and operating currents
General Description
The bq2158T provides a complete solution for the super-
vision of two series Li-Ion cells. Designed for battery
pack integration, the bq2158T incorporates a bq2058T
Pack Supervisor, two FETs, and all other components re-
quired to monitor overvoltage, undervoltage, and over-
cu rr en t c on d i ti o n s. T he b o a r d p r o v id es d ir ec t
connections for the negative and positive terminals of
each cell. See Figure 1. Please refer to the bq2058T
data sheet for specific information on the operation of
the bq2058T.
Unitrode configures the bq2158T based on the informa-
tion in Table 1.
Pin Descriptions
B1P
B1N
B2N
POS
NEG
Battery 1 positive input
Battery 1 negative input
Battery 2 negative input
Pack positive
Pack negative
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