Single-Cell Lithium-Ion Battery Protection IC
Reduction in board size with miniature SOT-23-5
package and few external components.
Ultra-low quiescent current of 7µA (VCC=3.5V).
Ultra-low power-down current of 0.6 µ A (VCC=2.2V).
Precision over-charge protection voltage
4.35V ± 50mV for the SS6821A
4.30V ± 50mV for the SS6821B
4.25V ± 50mV for the SS6821C
4.20V ± 50mV for the SS6821D
Built-in delay-time circuits for over-charge, over-
discharge, and over-current protection.
Load detection function during overcharge mode.
Two detection levels for over-current protection.
Protection IC for single-cell Lithium-Ion battery
The SS6821 battery protection IC is
designed to protect a lithium-ion battery from
damage or reduced lifetime due to over-charge,
over-discharge, and/or over-current in single-cell
lithium-ion battery powered systems, such as
cellular phones. The ultra-small package and
few external components make the SS6821
ideal for integration into the limited space of
of a battery pack.
The accurate ±50mV over-charging detection
voltage ensures safe and full-utilization
charging. Four different specification values for
over-charge protection voltage are provided for
various protection requirements. The very low
standby current drains little current from the cell
while in storage.
TYPICAL APPLICATION CIRCUIT
R1 5 VCC
Protection Circuit for Single-Cell Lithium-Ion Battery
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