S-8229AAA-M6T1U Datasheet, PDF (12/26 Pages) Seiko Instruments Inc – BATTERY MONITORING IC

BATTERY MONITORING IC
S-8229 Series
 Application Circuits
1. Detection of residual quantity of the battery used by LED
Rev.1.0_02
R_OUT1 R_OUT2 R_OUT3
R1
C1
VDD
S-8229
Series
ON / OFF _VSS
OUT1
OUT2
OUT3
LED1 LED2 LED3
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 =
RA + RB
RB
× −VDETn + RA × IDD
R_OUT1 R_OUT2 R_OUT3
R_A
VDD
OUT1
R_B
C1
S-8229
Series
OUT2
ON / OFF _VSS
OUT3
Figure 13
Caution 1.
2.
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
12