1 Overview
SIT8254 series products are ICs used for the protection of 3 or 4 series rechargeable lithium batteries, which can provide high-precision
Overcharge protection voltage, overdischarge protection voltage and discharge overcurrent protection voltage. SIT8254 overcharge protection delay
The delay of overdischarge protection and the delay of discharge overcurrent 1 can be adjusted by an external capacitor. In addition, SIT8254 has
The 0V charging function improves the service life of the pack.
SIT8254 is suitable for protecting 3/4 string lithium battery pack, and the SEL pin is used to select 3/4 string application.

2. Features
High-precision voltage detection function:
High voltage mode (applicable to liquid lithium ion batteries, polymer lithium ion batteries, etc.)
Overcharge protection voltage V OV: 3.9V-4.4V (range 50mV)
Accuracy: ±25mV
Overcharge release voltage: 3.8V-4.4V
Accuracy: ±50mV
Over-discharge protection voltage V UV ：2.0V-3.0V (gear position 100mV)
Accuracy: ±80mV
Over-discharge release voltage: 2.0V-3.4V
Accuracy: ±100mV
Low voltage mode (suitable for liquid lithium ion batteries, polymer lithium ion batteries, etc.)
Overcharge protection voltage V OV: 3.4V-3.9V (50mV gear)
Accuracy: ±25mV
Overcharge release voltage: 3.3V-3.9V
Accuracy: ±50mV
Over-discharge protection voltage V UV: 1.8V-2.8V (gear 100mV)
Accuracy: ±80mV
Over-discharge release voltage: 1.8V-3.2V
Accuracy: ±100mV

Discharge overcurrent detection function:
Overcurrent 1 protection voltage V IV1 ：0.05V-0.3V (gear position 12.5mV)
Overcurrent 1 Protection voltage accuracy: ±12.5mV
Overcurrent 2 protection voltage V IV2 ：0.5V
Overcurrent 2 protection voltage accuracy: ±25mV
Short circuit detection function:
Short circuit protection voltage VSC: VC1-1.2V
Short circuit protection voltage accuracy: ±200mV

The external capacitor sets overcharge protection delay, overdischarge protection delay and discharge overcurrent 1 protection delay
Discharge overcurrent protection 2 time delay and short circuit protection time delay are fixed
Operating voltage range: 3V-30V
Operating temperature range: -40°C～85°C
Low power design:
Normal working power consumption: 16μA (typical value)
Sleep mode power consumption: 1uA (typical value)
Package form: 16-pin TSSOP
SEL pin selection 3/4 string application