Power Management ICs

Battery Protection IC for 3-serial to 5-serial Cell Pack S-8245A/C Series

The S-8245A/C 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. Cascade connection using the S-8245A/C Series realizes protecting 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 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
Protection 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: 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-8245AAA-FGT1U24-Pin SSOP4.1004.0502.6002.7000.0200.0400.100-0.020AvailableAvailable8310.6700.2700.7950.190
S-8245AAB-FGT1U24-Pin SSOP4.3504.1502.4002.7000.1500.3000.500-0.150UnavailableAvailable8310.8500.1500.9000.100
S-8245AAC-FGT1U24-Pin SSOP4.2504.1502.5003.0000.1000.2000.500-0.100UnavailableAvailable8310.6700.2700.7950.190
S-8245CAA-FGT1U24-Pin SSOP4.1004.0502.6002.7000.0200.0400.100-0.020UnavailableAvailable8310.6700.2700.7950.190
S-8245CAB-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.