磷酸铁锂二合一保护芯片，过充3.75V，过放2.1V，放电过流标准值8.5A，内阻17.5mΩ，采用ESN4封装。
GENERAL DESCRIPTION
The XB4851SKP product is a high integr
ation solution for Lithium iron phosphate b
attery protection. XB4851SKP contains ad
vanced power MOSFET, high-accuracy vol
tage detection circuits and delay circuits. X
B4851SKP is put into an ultra-small ESN4
package with simple components makes it
an ideal solution in limited space of battery
pack.
XB4851SKP has all the protection functi
ons required in the battery application inclu
ding overcharging, overdischarging, overcu
rrent and load short circuiting protection et
c. The accurate overcharging detection volt
age ensures safe and full utilization chargin
g. The low standby current drains little curr
ent from the cell while in storage.
The device is not only targeted for digital
cellular phones, but also for any one-cell r
echargeable LiFePO4 battery pack applian
ces requiring long-term battery life.
FEATURES
Protection of Charger Reverse Connec
tion
Protection of Battery Cell Reverse Con
nection Without external load
Integrated Advanced Power MOSFET
with Equivalent of 17.5 mΩ RSS(ON)
Ultra-small ESN4 Package
Over-temperature Protection
Overcharge Current Protection
Two-step Overcurrent Detection
-Overdischarge Current
-Load Short Circuiting
Low Current Consumption
-Operation Mode: 3.7µA typ.
-Power-down Mode:0.1µA max.
Charger Detection Function
0V Battery Charging Function
Delay Times are generated inside
High-accuracy Voltage Detection
RoHS Compliant and Lead (Pb) Free
APPLICATIONS
One-Cell LiFePO4 Rechargeable Battery
Packs
