S8224A Datasheet, PDF (15/33 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL CELL PACK (SECONDARY PROTECTION)

BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL CELL PACK (SECONDARY PROTECTION)
Rev.1.2_00
S-8224A/B Series
4. CTL pin
The S-8224A/B Series has control pins.
In the S-8224A/B Series, the CTL pin is used to control the output voltage of the CO pin. The CTL pin takes precedence
over the overcharge detection circuit.
Table 8 Status Set by CTL Pin
CTL Pin
"H"
CO Pin
Normal status^*1
Open
Detection status
"L"
Detection status
*1. The status is controlled by the overcharge detection circuit.
–
CTL^*1
+
Pull-down resistor
*1. In the S-8224A/B Series, the inversion voltage "H" to "L" or "L" to "H" of the CTL pin is the VDD pin voltage −
2.8 V typ., and does not have the hysteresis.
Figure 10 Internal Equivalent Circuit of CTL Pin
Caution In the S-8224A/B Series, since the CTL pin implements high resistance of 7 MΩ to 24 MΩ for pull
down, be careful of external noise application. If an external noise is applied, the CO pin may
become "H". Perform thorough evaluation using the actual application.
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