S8224A Datasheet, PDF (1/33 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL CELL PACK (SECONDARY PROTECTION)

S-8224A/B Series
www.sii-ic.com
BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL CELL PACK
(SECONDARY PROTECTION)
© SII Semiconductor Corporation, 2017
Rev.1.2_00
The S-8224A/B Series is used for secondary protection of lithium-ion rechargeable batteries, and incorporates high-accuracy
voltage detection circuits and delay circuits.
Short-circuits between cells accommodate series connection of two cells to four cells.
The S-8224B Series limits its CO pin output voltage to 11.5 V max., so an FET with the gate withstand voltage of 12 V can be
used.
 Features
• High-accuracy voltage detection circuit for each cell
Overcharge detection voltage n (n = 1 to 4)
3.600 V to 4.700 V (50 mV step)
Accuracy ±20 mV (Ta = +25°C)
Overcharge hysteresis voltage n (n = 1 to 4)^*1
Accuracy ±25 mV (Ta = −10°C to +60°C)
0.0 mV to −550 mV (50 mV step)
−300 mV to −550 mV
Accuracy ±20%
−100 mV to −250 mV
Accuracy ±50 mV
−50 mV
Accuracy ±25 mV
0.0 mV
Accuracy −25 mV to +20 mV
• Delay times for overcharge detection are generated only by an internal circuit (external capacitors are unnecessary)
Overcharge detection delay time is selectable:
1 s, 2 s, 4 s, 6 s, 8 s
Overcharge release delay time is selectable:
2 ms, 64 ms
• Built-in timer reset delay circuit
• Output control function via CTL pin
• Output form is selectable (S-8224A Series):
CMOS output, Nch open-drain output
• Output logic is selectable (S-8224A Series):
Active "H", active "L"
• CO pin output voltage is limited to 11.5 V max. (S-8224B Series)^*2
• High-withstand voltage:
Absolute maximum rating 28 V
• Wide operation voltage range:
3.6 V to 28 V
• Wide operation temperature range:
Ta = −40°C to +85°C
• Low current consumption
During operation (V_CU − 1.0 V for each cell):
0.25 μA typ., 0.6 μA max. (Ta = +25°C)
During overdischarge (V_CU × 0.5 V for each cell):
0.3 μA max. (Ta = +25°C)
• Lead-free (Sn 100%), halogen-free
*1. Select the overcharge hysteresis voltage calculated as the following formula.
(Overcharge detection voltage n) + (Overcharge hysteresis voltage n) ≥ 3.4 V
*2. Only output logic active "H" is available.
 Application
• Lithium-ion rechargeable battery packs (for secondary protection)
 Package
• SNT-8A
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