Power Management ICs

Battery Protection IC for 3-serial to 5-serial Cell Pack S-8245B/D Series

The S-8245B/D Series is a protection IC for 3-serial to 5-serial cell lithium-ion rechargeable batteries, which includes high-accuracy voltage detection circuits and delay circuits. It is suitable for protecting 3-serial to 5-serial cell lithium-ion rechargeable battery packs from overcharge, overdischarge, and overcurrent.
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 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
Three-level discharge overcurrent detection
Discharge overcurrent 1 detection voltage: 0.020 V to 0.300 V (10 mV step) Accuracy ±10 mV
Discharge overcurrent 2 detection voltage: 0.040 V to 0.500 V (20 mV step) Accuracy ±15 mV
Load short-circuiting detection voltage: 0.100 V to 1.000 V (25 mV step) Accuracy ±50 mV
Charge overcurrent detection
Charge overcurrent detection voltage: −0.300 V to −0.020 V (10 mV step) Accuracy ±10 mV
Each delay time is settable by an external capacitor
(Load short-circuiting detection delay time and temperature detection delay time are internally fixed)
Independent control of charge inhibition, discharge inhibition, and power-saving by each control pin
0 V battery charge function is selectable
Available, unavailable
Power-down function is selectable
Available, unavailable
CIT pin internal resistance value is selectable
831 kΩ typ., 8.31 MΩ typ.
CO and DO pin output voltage is limited to 15 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
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: 20 μA max. (Ta = +25°C)
During power-down: 0.5 μA max. (Ta = +25°C)
During power-saving: 0.1 μA max. (Ta = +25°C)
Lead-free (Sn 100%), 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

  • Lithium-ion rechargeable 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)
Discharge
Overcurrent 1
Detection
Voltage
[VDIOV1]
(V)
Discharge
Overcurrent 2
Detection
Voltage
[VDIOV2]
(V)
Load
Short-circuiting
Detection
Voltage
[VSHORT]
(V)
Charge
Overcurrent
Detection
Voltage
[VCIOV]
(V)
0 V Battery
Charge
Function
Power-down
Function
CIT Pin
Internal
Resistance
Value
[RCIT]
(kΩ)
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-8245BAA-FGT1U24-Pin SSOP4.1004.0502.6002.7000.0200.0400.100-0.020AvailableAvailable8310.6700.2700.7950.190
S-8245BAB-FGT1U24-Pin SSOP4.2504.1502.5003.0000.1000.2000.500-0.100UnavailableAvailable8310.6700.2700.7950.190
S-8245DAA-FGT1U24-Pin SSOP4.1004.0502.6002.7000.0200.0400.100-0.020UnavailableAvailable8310.6700.2700.7950.190
S-8245DAB-FGT1U24-Pin SSOP4.2504.1502.5003.0000.1000.2000.500-0.100UnavailableAvailable8310.6700.2700.7950.190

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

Last modified: Nov. 02, 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.