SS6821

Features:

Reduction in board size with miniature SOT-23-5
package and few external components.
Ultra-low quiescent current of 7mA (V_CC=3.5V).
Ultra-low power-down current of 0.6 m A (V_CC=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, overdischarge,
and over-current protection.
Load detection function during overcharge mode.
Two detection levels for over-current protection.


Application

Protection IC for single-cell Lithium-Ion battery packs.


Pinout




Specifications

Supply Voltage................................................. 18V
DC Voltage Applied on other ........................... 18V
Charger Voltage .............................................. 14V
Operating Temperature Range ........... -40 ~85
Storage Temperature Range ........... - 65 ~125

Description

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 of SS6821 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 of SS6821 drains little current from the cell while in storage.