ABLIC S-82K3B/K4B Battery Monitoring ICs

ABLIC S-82K3B/K4B Battery Monitoring ICs are designed for secondary protection of lithium-ion rechargeable batteries, incorporating high-accuracy voltage detection circuits and delay circuits. These ICs enable the connection of a 3-serial cell, and the S-82K4B enables the connection of a 4-serial cell. The S-82K3B/K4B ICs provide a wake-up function to prevent the fuse from blowing during battery connection, allowing the lithium battery to be connected in any order. These ICs include a 1.5V to 3.3V VRTC pin output voltage range that can be used as an external Real-Time Clock IC (RTC). The S-82K3B/K4B ICs feature a 2mA maximum VRTC pin output current and a maximum 4µA low current consumption. These battery monitoring ICs are lead-free (Sn 100%) and halogen-free.

Features

High-accuracy voltage detection circuit for each cell:
- Overcharge detection voltage:
  - 3.600V to 5V (5mV steps)
  - ±15mV (Ta = +25°C) accuracy
  - ±20mV (Ta = -10°C to +60°C) accuracy
- Overcharge release voltage:
  - 3.600V to 5V
  - ±50mV accuracy
- VRTC pin shutdown voltage:
  - 2.500V to 2.800V (100mV step)
  - ±50mV accuracy
Delay times are generated only by an internal circuit (external capacitors are unnecessary) (1s, 2s, 4s, and 6s overcharge detection delay time, VRTC pin shutdown delay time)

The wake-up function monitors battery connection preventing CO pin output errors during battery connection
2mA maximum VRTC pin output current
1.500V to 3.300V (100mV step) VRTC pin output voltage with ±2% (Ta = +25°C) accuracy
CO pin output voltage is limited to 7.5V maximum
Overcharge timer reset function (available and unavailable)
-40°C to +85°C wide operating temperature range
Lead-free (Sn 100%) and halogen-free