BQ27750DRZR: High-Performance Battery Protection IC for Lithium-Ion/Polymer Cells
BQ27750DRZR: Advanced Battery Protection IC for Lithium-Ion/Polymer Applications
The BQ27750DRZR from Texas Instruments represents a cutting-edge solution for safeguarding single-cell lithium-ion and lithium-polymer batteries. As a highly specialized Power Management Integrated Circuit (PMIC), this device offers unparalleled protection features, making it indispensable for modern portable electronics and IoT devices.
In-Depth Technical Overview
Manufacturer and Product Status
Developed by Texas Instruments (TI), a global leader in semiconductor technology, the BQ27750DRZR is currently classified as obsolete. However, its proven reliability keeps it in demand for legacy systems and as a reference design for new developments.
Comprehensive Protection Features
The BQ27750DRZR provides a complete suite of protection mechanisms:
- Advanced Overcurrent Protection: Implements multi-level current monitoring with adjustable thresholds
- Precision Temperature Monitoring: Features 1 C accuracy for critical thermal management
- Voltage Protection System: Includes both overvoltage and undervoltage lockout (UVLO) protection
- Short-Circuit Response: Ultra-fast reaction time (<1 s) for short-circuit events
Detailed Technical Specifications
Battery Chemistry Compatibility
Optimized for:
- Standard Lithium-Ion (Li-Ion)
- Lithium Polymer (Li-Po)
- Lithium Iron Phosphate (LiFePO4) with configuration adjustments
Communication Interface
The integrated I2C interface (up to 400kHz) enables:
- Real-time battery status monitoring
- Programmable protection thresholds
- System diagnostics and fault logging
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temperature | -40 C to +85 C |
| Storage Temperature | -65 C to +150 C |
| Humidity Tolerance | 85% RH non-condensing |
Package and Physical Characteristics
The device comes in a 12-VFDFN Exposed Pad package (2.5mm 4mm) with:
- 0.5mm pitch for high-density PCB layouts
- Exposed thermal pad for enhanced heat dissipation
- RoHS-compliant construction
Application Scenarios
Consumer Electronics
Ideal for:
- Smartphones and tablets
- Digital cameras and camcorders
- Portable gaming devices
Medical Devices
Critical for:
- Portable diagnostic equipment
- Patient monitoring systems
- Implantable device chargers
Design Considerations
When implementing the BQ27750DRZR:
- Ensure proper PCB thermal design for the exposed pad
- Implement recommended decoupling capacitor values
- Follow TI's layout guidelines for noise-sensitive I2C lines
- Consider firmware implementation for protection recovery sequences
Alternative Solutions
For new designs, consider these TI alternatives:
- BQ27742: Updated version with enhanced gas gauge
- BQ25601: Integrated charger+protection solution
- BQ29700: Simpler protection-only alternative
Purchasing and Availability
While obsolete, the BQ27750DRZR can be sourced through:
- Authorized TI distributors with remaining stock
- Specialized obsolete component suppliers
- Verified aftermarket sources
Conclusion
The BQ27750DRZR remains a benchmark in single-cell battery protection technology, offering engineers a reliable, field-proven solution. Its comprehensive feature set continues to make it relevant despite its obsolete status, particularly in maintenance of existing systems and as a reference for new designs requiring robust battery safety features.