Datasheet

DS2780 Standalone Fuel Gauge IC
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Figure 2. Multicell Application Example
DQ
SNS
VDD
VSS
RSNS
PK+
PK-
DATA
Protection
Circuit
PIO
150
150
PIO
Multi-Cell
Li-Ion
Battery
0.1uF
OVD
VIN
(n * R)
(1) (1)
(1) Components improve IEC1004 Air/Contact ESD compliance
R
4.7uF
0.1uF
500
Figure 3. Inside Protector Example
PROTECTOR CIRCUIT LOCATION
The battery protection circuitry can be located inside or outside the DS2780. Either location is acceptable but there
are some advantages and disadvantages to both. With the protection circuit located inside, see Figure 2 and
Typical Operating Circuit on page 1, the DS2780 will loose power in a circuit protection event. The DS2780 stores
DQ
SNS
VDD
VSS
RSNS
PK+
PK-
DATA
Protection
Circuit
DS2780
PIO
150
150
PIO
Li-Ion
Battery
0.1uF
OVD
VIN
1K
500
(1) (1)
(1) Precaution must be taken to ensure that a charge path is not created from
PK+ to Data or PIO.