JW3311 is a multi-cell battery protection IC that includes high-accuracy voltage detection circuits and delay circuits. It is possible for users to monitor the status of 8~10 series cell lithium-ion rechargeable battery pack.

JW3311 provides multiple protect functions including over-charge, over-discharge, over-current, over-temperature and open wire detection. More JW3311s can operate in cascade to protect long string battery.

FEATURES


Wide range of operation voltage 6V to 60V


Monitor 8~10 series cell battery and support

cascaded operation


High-accuracy voltage detection for each cell

Overcharge detection voltage VOC:

3.6~4.4V (50mV step)

Accuracy ±25mV

Overcharge release hysteresis VOCH:

0.1~0.4V (100mV step)

Over discharge detection voltage VOD:

2.3~3.0V (100mV step) Accuracy ±80mV

Over discharge release hysteresis VODH:

0.2~0.5V (100mV step)


Charge over current detection voltage: VCOI

10 mV, 30 mV, 50 mV, none


Discharge over current detection in 3-step

1

st detection voltage VDOI1:

0.05~0.2V (50mV step) Accuracy ±10mV

2

nd detection voltage VDOI2:

2VDOI1 (100mV step) Accuracy ±20mV

Short circuit detection voltage VSHT:

0.4~0.7V (100mV step) Accuracy ±80mV


High-accuracy battery temperature detection

Charging over-temperature protection

threshold:

0.85V (50°C) Accuracy ±30mV (±4°C)

Charging under-temperature protection

threshold:

0.23V (-10°C) Accuracy ±30mV (±4°C)

Discharging over-temperature protection

threshold:

0.98V (70°C) Accuracy ±25mV (±4°C)


Overcharge protection and release delay time,

Over discharge protection and release delay

time, Load short circuit protection and release

delay time is fixed


Programmable by external capacitor:

Discharge over current detection delay time,

1st: 0.1~10s 2nd: (0.1~10s)×1%


Discharge disable mode selectable


Open wire detection


Charging Permission (CP) condition check


Wide range of operation temperature

-40°C to +85°C


Low current consumption

Full power mode 20uA max. (T=25°C)

Sleep mode 12uA max. (T=25°C)

Shutdown mode 350nA max. (T=25°C)


Package: 24-Pin TSSOP

APPLICATIONS


Rechargeable lithium-ion battery pack


Electric Bicycles, Motorcycles


Backup Battery Systems


Hybrid Electric Vehicles