Operation

The bq2158 monitors each series element for under-

voltage, over-voltage, and over-current conditions. If a

sleep mode. The bq2158 wakes up and enables discharge

plied across POS and NEG. Charging is disabled if a cell

charge FET off if the steady state load current exceeds

3

FG2158cc.eps

B1P

NC

Load

or

Charger

Three-Cell Configuration

POS

NEG

B1N

B2N

B3N

B4N

B1P

Load

or

Charger

Four-Cell Configuration

POS

NEG

B1N

B2N

B3N

B4N

Note: B1P, B4N, POS, and NEG accomodate a #20 AWG stranded wire.

B1N, B2N, and B3N accomodate a #24 AWG stranded wire.

Figure 1. Module Connection Diagram

Number of Cells

On-board bq2058 Configuration

3 cells

BAT1N tied to BAT1P

4 cells

Table 2. Pin Connections

bq2158