Product Overview
Connection Example: 4-serial cell
Connection Example: 3-serial cell
DFN-8(2020)A (IB008-A)
This IC is used for secondary protection of lithium-ion rechargeable batteries and incorporates high-accuracy voltage detection circuits and delay circuits.
Short-circuiting between the VC1 and VC2 pins makes it possible to serially connect three cells.
Since this IC also comes with a constant voltage output circuit capable of outputting 1.5 V to 3.3 V, it can be used as a constant-voltage power supply for an external RTC (Real-Time clock IC).
Features
- High-accuracy voltage detection circuit for each cell
- Overcharge detection voltage n
3.600 V to 5.000 V (5 mV step)
: Accuracy ±15 mV (Ta = +25°C)
: Accuracy ±25 mV (Ta = −10°C to +60°C) - Overcharge release voltage n*1
3.600 V to 5.000 V
: Accuracy ±50 mV - VRTC pin shutdown voltage n
2.500 V to 2.800 V (100 mV step)
: Accuracy ±50 mV - Delay times are generated only by an internal circuit (external capacitors are unnecessary)
- Overcharge detection delay time, VRTC pin shutdown delay time: 1 s, 2 s, 4 s, 6 s
- Output control function via CTL pin (CTL pin is pulled down internally)
- Overcharge timer reset function
- Available, unavailable
- CO pin output voltage is limited to 7.5 V max.
- VRTC pin output voltage
- 1.500 V to 3.300 V (100 mV step)
: Accuracy ±2% (Ta = +25°C) - VRTC pin output current
- 2 mA max.
- Wide operation temperature range
- Ta = −40°C to +85°C
- Low current consumption
- During operation (VCU − 1.0 V for each cell): 4.0 μA max.
- During VRTC pin shutdown (VRSD − 1.0 V for each cell): 0.4 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 1. The order of battery connection of this IC is limited. Customers who desire a product that does not limit the order of battery connection should consider the S-82M3A/M4A Series of products instead.
2. n = 1, 2, 3, 4
Applications
- Lithium-ion rechargeable battery packs (for secondary protection)