Datasheet:
S8254_E.pdf
Description
The S-8254 series is a protection IC for 3-serial or 4-
serial cell lithium-ion / lithium polymer rechargeable
batteries and includes a high-accuracy voltage detector
and delay circuit.
The S-8254 series protects both 3-serial or 4-serial cells
using the SEL pin for switching.
Features
Features
(1) High-accuracy voltage detection for each cell
• Overcharge detection voltage n (n = 1 to 4) 3.9 to 4.4 V (50 mV steps) Accuracy ± 25 mV
• Overcharge release voltage n (n = 1 to 4) 3.8 to 4.4 V*1 Accuracy ± 50 mV
• Overdischarge detection voltage n (n = 1 to 4) 2.0 to 3.0 V (100 mV steps) Accuracy ± 80 mV
• Overdischarge release voltage n (n = 1 to 4) 2.0 to 3.4 V*2 Accuracy ± 100 mV
(2) Three-level overcurrent protection
• Overcurrent detection voltage 1 0.05 to 0.30 V (50 mV steps) Accuracy ± 25 mV
• Overcurrent detection voltage 2 0.5 V Accuracy ± 100 mV
• Overcurrent detection voltage 3 VC1 − 1.2 V Accuracy ± 300 mV
(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set
by external capacitors (delay times for overcurrent detection 2 and 3 are fixed internally).
(4) Switchable between a 3-serial cell and 4-serial cell using the SEL pin
(5) Charge/discharge operation can be controlled via the control pins.
(6) Withstanding voltage element Absolute maximum rating : 26 V
(7) Wide operating voltage range 2 to 24 V
(8) Wide operating temperature range − 40 to + 85 °C
(9) Low current consumption
• Operation mode 30 μA max. (+ 25 °C)
• Power-down mode 0.1 μA max. (+ 25 °C)
(10) Lead-free products
*1. Overcharge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.1 to 0.4 V in
50 mV steps.
(Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage)
*2. Overdischarge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.2 to 0.7 V in
100 mV steps.
(Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection voltage)
