ABLIC U.S.A. Inc.

S-821A/1B Series Battery Protection ICs

ABLIC protection ICs have an internal triple boost charge pump, which can increase the drive voltage of the Nch MOSFET

Image of ABLIC S-821A/1B Series - Battery Protection ICsABLIC S-821A/1B series is an IC that can provide Nch high-side protection, which is necessary for short-circuit protection in metal-cased batteries.

By placing the Nch MOSFETs, which control charging and discharging, on the positive side (high-side) of the lithium battery, the ground levels of the battery pack and system can reach the same voltage, contributing to a simplified system design.

The S-821A/1B series has an internal triple boost charge pump, which can increase the drive voltage of the Nch MOSFET. This reduces the on-resistance, suppressing the heat generated by the MOSFET and improving safety during charging.

Block Diagram
    Image of ABLIC Block Diagram
Connection Example
    Image of ABLIC Connection Example Diagram
Features
  • Overdischarge release voltage: 2,000 V to 3,400 accuracy ±75 mV
  • Discharge overcurrent 1 detection voltage:
    • S-821A: -3 mV to -100 mV (0.25 mV step) accuracy ±1 mV
    • S-821B: -3 mV to -100 mV (0.25 mV step) accuracy ±0.75 mV
  • Discharge overcurrent 2 detection voltage:
    • S-821A: -6 mV to -100 mV (0.5 mV step) accuracy ±3 mV
    • S-821B: -6 mV to -100 mV (0.5 mV step) accuracy ±2 mV
  • Load short-circuiting detection voltage:
    • S-821A: -20 mV to -100 mV (1 mV step) accuracy ±5 mV
    • S-821B: -20 mV to -100 mV (1 mV step) accuracy ±4 mV
  • Charge overcurrent detection voltage:
    • S-821A: 3 mV to 100 mV (0.25 mV step) accuracy ±1 mV
    • S-821B: 3 mV to 100 mV (0.25 mV step) accuracy ±0.75 mV
  • High-accuracy temperature detection circuit with an external NTC thermistor (resistance: 100 kΩ ±1% or 470 kΩ ±1% at +25°C, B-constant: ±1%)
    • Overheat detection temperature: +65°C to +85°C (5°C step) accuracy ±3°C
    • Overheat release temperature: +55°C to +80°C (5°C step)*4 accuracy ±5°C
  • Low current consumption:
    • During operation: 6.0 μA typ., 10 μA max. (TA = +25°C)
    • During power-down: 50 nA max. (TA = +25°C)
    • During overdischarge: 1.0 μA max. (TA = +25°C)
    • During power-saving: 50 nA max. (TA = +25°C)
  • 0 V battery charge inhibition battery voltage: 1.45 V to 2.00 (50 mV step) accuracy ±50 mV
  • Overheat detection function
  • Overcharge detection voltage: 3,500 V to 4,800 V (5 mV step) accuracy ±15 mV
  • Overcharge release voltage: 3,100 V to 4,800 accuracy ±50 mV
  • Overdischarge detection voltage: 2,000 V to 3,000 V (10 mV step) accuracy ±50 mV
  • Internal charge pump
  • Triple boost (regulation voltage = VDD + 4.2 V)
  • Detection delay times are generated only by an internal circuit (external capacitors are unnecessary)
  • Discharge overcurrent control function, release condition of discharge overcurrent status: load disconnection, charger connection
  • 0 V battery charge
  • Power-down function and power-saving function
  • PS pin internal resistance connection, pull-up and pull-down in normal and power-saving status
  • PS pin internal resistance value: 1 MΩ to 10 MΩ (1 MΩ step)
  • PS pin control logic: active "H", active "L"
  • High withstand voltage: VM pin, CO pin and DO pin: absolute maximum rating 28 V
  • Wide operation temperature range: TA = -40°C to +85°C
  • Lead-free, Sn100%, halogen-free
Applications
  • Lithium-ion rechargeable battery packs
  • Lithium polymer rechargeable battery packs

S-821A 1B Series Battery Protection ICs

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
LITHIUM-ION BATTERY PROTECTION IS-821AAAA-I8T1ULITHIUM-ION BATTERY PROTECTION I90 - Immediate$2.68View Details
LITHIUM-ION BATTERY PROTECTION IS-821BAAD-H8T7SLITHIUM-ION BATTERY PROTECTION I90 - Immediate$3.01View Details
LITHIUM-ION BATTERY PROTECTION IS-821BAAC-H8T7SLITHIUM-ION BATTERY PROTECTION I95 - Immediate$3.01View Details
Published: 2025-03-07