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.