S8229 datasheet(12/26 Pages) SII

12 / 26 page

BATTERY MONITORING IC

S-8229 Series

Rev.1.0_01

Seiko Instruments Inc.



Application Circuits

1. Detection of residual quantity of the battery used by LED

OUT1

OUT2

OUT3

S-8229

Series

ON / OFF

VSS

VDD

ROUT1

ROUT2

ROUT3

LED3

LED2

LED1

Figure 12

Caution

The above connection diagram and constant will not guarantee successful operation. Perform

thorough evaluation using the actual application to set the constant.

2. Change of detection voltage

When the detection voltage is changed by using a resistance divider, set RA

≤ 100 kΩ to prevent oscillation, as

shown in Figure 13.

The detection voltage after changing is calculated by using the following equation.

Detection voltage =

+ RB

× −VDETn + RA × IDD

OUT1

OUT2

OUT3

S-8229

Series

ON / OFF

VSS

VDD

ROUT1 ROUT2 ROUT3

Figure 13

Caution 1.

Note that the detection voltage may deviate from the value determined by the ratio of RA and RB

in the case of the above connection diagram.

The above connection diagram and constant will not guarantee successful operation. Perform

thorough evaluation using the actual application to set the constant.

Remark

n = 1 to 3

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