1 Overview
SIT2122 built-in high-precision voltage detection circuit and delay circuit, is
For the protection of lithium ion rechargeable batteries/lithium polymer rechargeable batteries
IC.
SIT2122 is suitable for 2 series lithium ion/lithium polymer batteries
Group overcharge, overdischarge, charge overcurrent and discharge overcurrent protection.

2. Features
High voltage device: Absolute maximum rating 32V
Built-in high-precision voltage detection circuit:
SIT2122 Overcharge detection voltage 3..65±0.025V
Overdischarge detection voltage 2.0±0.08V
Discharge overcurrent 1 detection voltage 0.20±0.020V
3-stage discharge overcurrent detection (discharge overcurrent 1, discharge overcurrent 2 and negative
Load short circuit detection)
Charge overcurrent detection function
Built-in delay capacitor, no need for external capacitor
With charging function to 0V battery
Low current consumption:
Typical value during operation: 7μA
Maximum value during sleep: 0.1μA
Package form: SOT-23-6

3. Application
Lithium-ion rechargeable battery pack
Lithium polymer rechargeable battery pack