Power Management ICs

Battery Monitoring IC for 3-serial to 5-serial Cell Pack S-8255A Series

The S-8255A Series is a monitoring IC for 3-serial to 5-serial cell lithium-ion rechargeable batteries, which includes high-accuracy voltage detection circuits and delay circuits. The S-8255A Series can monitor the status of 3-serial to 5-serial cell lithium-ion rechargeable battery packs. Cascade connection using the S-8255A Series realizes monitoring 6-serial or more cells lithium-ion rechargeable battery packs.
Connecting an NTC, it allows for the temperature detection at four different points: high temperature detection during charging, low temperature detection during charging, high temperature detection during discharging, and low temperature detection during discharging.

Features

High-accuracy voltage detection function for each cell
Overcharge detection voltage n (n = 1 to 5): 3.550 V to 4.600 V (50 mV step) Accuracy ±20 mV
Overcharge release voltage n (n = 1 to 5): 3.150 V to 4.600 V*1 Accuracy ±50 mV
Overdischarge detection voltage n (n = 1 to 5): 2.000 V to 3.200 V (100 mV step) Accuracy ±80 mV
Overdischarge release voltage n (n = 1 to 5): 2.000 V to 3.400 V*2 Accuracy ±100 mV
Each delay time is settable by external capacitor (Temperature detection delay time is internally fixed)
Independent control of charge inhibition, discharge inhibition, and power-saving by each control pin
0 V battery detection function is selectable
Available, unavailable
CO and DO pin output voltage is limited to 8 V max. respectively
Switching control for 3-serial to 5-serial cell is possible by inputting voltage to the SEL1 pin and the SEL2 pin
Monitoring of 6-serial or more cells is possible by cascade connection
Temperature detection is possible at four different points by connecting an NTC
High temperature detection ratio during charging / discharging: 0.600 to 0.900 (0.005 step) Accuracy ±0.005
Low temperature detection ratio during charging / discharging: 0.030 to 0.400 (0.005 step) Accuracy ±0.005
High-withstand voltage
Absolute maximum rating 28 V
Wide operation voltage range
5 V to 24 V
Wide operation temperature range
Ta = -40°C to +85°C
Low current consumption
During operation: 19 µA max. (Ta = +25°C)
During power-saving: 0.1 µA max. (Ta = +25°C)
Lead-free, halogen-free

*1. Overcharge release voltage = Overcharge detection voltage – Overcharge hysteresis voltage
(Overcharge hysteresis voltage n (n = 1 to 5) is selectable in 0 V to 0.4 V in 50 mV step)

*2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage n (n = 1 to 5) is selectable in 0 V to 0.7 V in 100 mV step)

Applications

  • Rechargeable lithium-ion battery pack

Parts List

Product namePackageOvercharge
Detection
Voltage
[VCU]
(V)
Overcharge
Release
Voltage
[VCL]
(V)
Overdischarge
Detection
Voltage
[VDL]
(V)
Overdischarge
Release
Voltage
[VDU]
(V)
0 V Battery
Detection
Function
High Temperature
Detection Ratio
during
Charging
[rTHCH]
Low Temperature
Detection Ratio
during
Charging
[rTHCL]
High Temperature
Detection Ratio
during
Discharging
[rTHDH]
Low Temperature
Detection Ratio
during
Discharging
[rTHDL]
Product name
S-8255AAA-TET1S20-Pin TSSOP4.1004.0502.6002.700Unavailable0.6700.2700.7950.190
S-8255AAB-TET1S20-Pin TSSOP4.2504.1502.5003.000Available0.6700.2700.7950.190

Please confirm the product name and specifications with the data sheet again.

Last modified: Nov. 09, 2018

  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.