IP3008
Multi-cell battery protection IC supporting 2-3 series lithium cells with cell balancing and comprehensive protection...
Product Overview
Description
The IP3008 is a multi-cell battery protection IC designed for 2-3 series lithium battery packs.
It provides individual cell monitoring, cell balancing, and comprehensive protection functions.
The IC is ideal for higher voltage applications such as power tools, e-bikes, and portable power stations.
Product Series
IP
Primary Application
Power tools and garden equipment
Key Features
- 2-3 series cell protection
- Individual cell voltage monitoring
- Automatic cell balancing
- Over-charge and over-discharge protection
- Over-current and short-circuit protection
- Temperature monitoring support
- Low power consumption in standby
- Charge/discharge control
Specifications
| Cell Count | 2-3 series (2S-3S) |
|---|---|
| Voltage Range | 6V to 12.6V (for 3S) |
| Over-charge Voltage | 4.20V to 4.35V per cell |
| Over-discharge Voltage | 2.50V to 2.80V per cell |
| Over-current | 10A to 30A (configurable) |
| Balancing Current | 50mA typical |
| Package | TSSOP-16 |
| Operating Temperature | -40°C to +85°C |
Applications
Power tools and garden equipment
Electronic system design
E-bikes and scooters
Electronic system design
Portable power stations
Electronic system design
Medical equipment
Medical electronics
Industrial devices
Industrial automation and control
FAE Expert Insights
"The IP3008 is a solid choice for multi-cell battery packs. The integrated balancing is a key feature - it eliminates the need for separate balancing circuits. I've used this in several power tool and e-bike applications with good results. The protection thresholds are appropriate for lithium cells, and the current handling is sufficient for moderate power applications. For higher current needs, external MOSFETs can be added. The TSSOP package is manageable for most designs."
Integrated balancing for 2-3S battery packs
— Robert Chen, BeiLuo
Frequently Asked Questions
How does cell balancing work in IP3008?
IP3008 monitors each cell voltage during charging. When a cell reaches full charge before others, the IC activates a bypass resistor for that cell, allowing other cells to continue charging. This passive balancing continues until all cells reach the same voltage. The typical balancing current is 50mA, suitable for most applications.
Balancing is automatic during charging. No external control needed. Ensure adequate PCB heat dissipation for balancing resistors.
Can IP3008 handle high discharge currents?
IP3008 internal MOSFETs support moderate currents up to 10-15A continuous. For higher currents (20A+), use external MOSFETs controlled by the IP3008. The IC provides gate drive signals for external high-current switches. This allows scaling to high-power applications while maintaining protection functionality.
Use internal FETs for currents under 15A. Add external MOSFETs for higher current applications.
How do I wire the cell connections for IP3008?
Connect each cell tap to the corresponding VC pin on IP3008: VC1 to first cell positive, VC2 to second cell positive, VC3 to third cell positive (for 3S). Connect battery negative to VSS. Use short, matched traces for cell sense connections to avoid measurement errors. Add bypass capacitors near the IC for stable operation.
Follow the reference schematic for cell connections. Keep sense traces short and matched.
What is the balancing accuracy of IP3008?
IP3008 typically achieves cell voltage matching within 50mV after balancing. The balancing starts when the highest cell exceeds the threshold voltage (typically 4.1V) and continues until cells are balanced or charging completes. The accuracy depends on cell characteristics, charging current, and balancing time available.
Expect ~50mV balancing accuracy. For tighter matching, consider active balancing solutions.
Does IP3008 support temperature monitoring?
Yes, IP3008 includes temperature monitoring through an external NTC thermistor. Connect the NTC between the TS pin and ground. The IC monitors temperature and can disable charging or discharging if temperature exceeds safe limits. This protects the battery from damage due to extreme temperatures.
Add NTC thermistor for temperature protection. Follow datasheet for thermistor selection.
Can I use IP3008 for 4S or higher cell counts?
IP3008 is designed for 2-3S configurations. For 4S or higher cell counts, consider other protection ICs designed for more cells, or use multiple protection ICs with appropriate configuration. Contact us for recommendations for higher cell count applications.
IP3008 is for 2-3S only. Contact us for 4S+ protection solutions.