Voltage Monitoring IC with Cell Balancing Function S-8249 Series

The S-8249 Series is a voltage monitoring IC with a cell balancing function and includes a high-accuracy voltage detection circuit and a delay circuit.
The S-8249 Series is suitable for cell balancing and overcharge protection of batteries and capacitors.

Features

High-accuracy voltage detection circuit

Cell balancing detection voltage: 2.0 V to 4.6 V (5 mV step)
Accuracy ±12 mV (2.0 V≦Vbu＜2.4 V), Accuracy ±0.5% (2.4 V≦Vbu≦4.6 V)

Cell balancing release voltage: 2.0 V to 4.6 V^*1
Accuracy ±24 mV (2.0 V≦Vbl＜2.4 V) , Accuracy ±1.0% (2.4 V≦Vbl≦4.6 V)

Overcharge detection voltage: 2.0 V to 4.6 V (5 mV step)
Accuracy ±12 mV (2.0 V≦Vcu＜2.4 V) , Accuracy ±0.5% (2.4 V≦Vcu≦4.6 V)

Overcharge release voltage: 2.0 V to 4.6 V^*2
Accuracy ±24 mV (2.0 V≦Vcl＜2.4 V) , Accuracy ±1.0% (2.4 V≦Vcl≦4.6 V)

Built-in Nch transistor with ON resistance of 5 Ω typ. between the CB pin and the VSS pin

Current consumption

2.0 μA max. (Ta = +25°C)

Delay times are generated only by an internal circuit (External capacitors are unnecessary).

CO pin output form and output logic are selectable

CMOS output Active “H”, active “L”

Nch open-drain output Active “H”, active “L”

Switchable to power-saving mode by using the CE pin

Operation temperature range

Ta = −40°C to +85°C

Lead-free (Sn 100%), halogen-free

*1. Cell balancing release voltage = Cell balancing detection voltage − Cell balancing hysteresis voltage
(Cell balancing hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.7 V in 50 mV step.)

*2. Overcharge release voltage = Overcharge detection voltage − Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.7 V in 50 mV step.)

Applications

• Rechargeable battery module
• Capacitor module