Connection Example: 5-serial cell
Connection Example: 10-serial cell
TMSOP-8 (FM008-A)
SNT-8A (PH008-A)
VCn pin which is connected to a constant current circuit: Unavailable (S-82M5A) ｜ Available (S-82M5B)
Overcharge detection voltage accuracy: ±15 mV (S-82M5A) ｜ ±20 mV (S-82K5A)
This IC is used for secondary protection of lithium-ion rechargeable batteries, incorporating high-accuracy voltage detection circuits and delay circuits in a small 8-pin package.
Short-circuiting between cells makes it possible for serial connection of 3-cell to 5-cell.
By cascade connection of these ICs, it is possible to protect 6-serial or more cells lithium-ion rechargeable battery packs.
Features
- High-accuracy voltage detection circuit for each cell
- Overcharge detection voltage n
3.500 V to 4.700 V (5 mV steps)
: Accuracy ±15 mV (Ta = +25°C)
: Accuracy ±20 mV (Ta = −10°C to +60°C) - Overcharge release voltage n*1
3.100 V to 4.700 V
: Accuracy ±50 mV - Delay times for overcharge detection are generated only by an internal circuit (external capacitors are unnecessary)
- Overcharge detection delay time: 0.5 s, 1 s, 2 s, 4 s, 6 s, 8 s
- CO pin output voltage is limited to 7.5 V max.
- Overcharge timer reset function
- Available, unavailable
- High-withstand voltage
- Absolute maximum rating 28 V
- Wide operating voltage range
- 3.6 V to 24 V
- Wide operating temperature range
- Ta = -40°C to +85°C
- Low current consumption
- During operation (3.4 V for each cell) : 3.0 µA max.
- Lead-free (Sn 100%) , halogen-free
*1. Overcharge release voltage = Overcharge detection voltage - Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected from a range of 0 mV to 400 mV in 50 mV step.)
Remark n = 1, 2, 3, 4, 5
Applications
- Lithium-ion rechargeable battery pack