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Overview - S-8225A Series

BATTERY MONITORING IC FOR 3-SERIAL TO 5-SERIAL CELL PACK S-8225A Series

The S-8225A Series includes a voltage detection circuit with high accuracy and a delay circuit, and can monitor the status of 3-serial to 5-serial cell lithium-ion rechargeable battery in single use. By switching the voltage level which is applied to the SEL1 pin and SEL2 pin, users are able to use the S-8225A Series for 3-serial to 5-serial cell pack.
By cascade connection using the S-8225A Series, it is also possible to protect 6-serial or more cells rechargeable lithium-ion battery pack.

DATA SHEET
2013.2.15

Features

    • High-accuracy voltage detection for each cell
      Overcharge detection voltage n (n = 1 to 5) : 3.5 V to 4.4 V (50 mV step), Accuracy ±20 mV (Ta = +25°C), ±30 mV (Ta = 0°C to +60°C)
      Overcharge release voltage n (n = 1 to 5) : 3.3 V to 4.4 V*1 , Accuracy ±50 mV
      Overdischarge detection voltage n (n = 1 to 5) : 2.0 V to 3.2 V (100 mV step) , Accuracy ±80 mV
      Overdischarge release voltage n (n = 1 to 5) : 2.0 V to 3.4 V*2 , Accuracy ±100 mV
    • Overcharge detection delay time and overdischarge detection delay time can be set by external capacitor.
    • Switchable between 3-serial to 5-serial cell by using the SEL1 pin and the SEL2 pin
    • Cascade connection is available.
    • The CO pin and the DO pin are controlled by the CTLC pin and the CTLD pin, respectively.
    • Output voltage of the CO pin and the DO pin is limited to 12 V max.
    • Withstand voltage element : Absolute maximum rating: 28 V
    • Wide operating voltage range : 4 V to 26 V
    • Wide operating temperature range : Ta = -40°C to +85°C
    • Low current consumption
      During operation (V1 = V2 = V3 = V4 = V5 = 3.4 V) : 22 µA max. (Ta = +25°C)
      During power-down (V1 = V2 = V3 = V4 = V5 = 1.6 V) : 4.5 µA max. (Ta = +25°C)
    • Lead-free (Sn 100%), halogen-free
    • Package : 16-Pin TSSOP

    *1. Overcharge hysteresis voltage n (n = 1 to 5) is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.
    (Overcharge hysteresis voltage = Overcharge detection voltage - Overcharge release voltage)
    *2. Overdischarge hysteresis voltage n (n = 1 to 5) is selectable in 0 V, or in 0.2 V to 0.7 V in 100 mV step.
    (Overdischarge hysteresis voltage = Overdischarge release voltage - Overdischarge detection voltage)

Applications

    • Rechargeable lithium-ion battery pack