ABLIC S-82M3A/M4A Battery Protection ICs

ABLIC S-82M3A/M4A Battery Protection ICs are designed to protect lithium-ion rechargeable batteries in the secondary state and incorporate high-accuracy voltage detection and delay circuits. The S-82M3A IC enables connection of 3-serial cells, and the S-82M4A IC enables connection of 4-serial cells. These ICs feature a wake-up function to prevent the fuse from blowing during battery connection, and allow the lithium battery to be connected in any order. The S-82M3A/M4A ICs include a constant voltage output circuit capable of outputting a 1.5V to 3.3V constant-voltage power supply for an external Real-Time clock IC (RTC). These 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 (T_a = +25°C) accuracy
  - ±20mV (T_a = -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
The wake-up function monitoring battery connection prevents CO pin output errors during battery connection
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)

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
Output control function via CTL pin (CTL pin is pulled down internally)
Overcharge timer reset function (available and unavailable)
-40°C to +85°C wide operating temperature range
Lead-free (Sn 100%) and halogen-free