SINGLE-CHIP/ LI-ION CHARGE MANAGEMENT IC FOR HANDHELD APPLICATIONS (bq TINY)# BQ24013DRC Technical Documentation
Manufacturer : TEXASINSTRUM
## 1. Application Scenarios
### Typical Use Cases
The BQ24013DRC is a highly integrated single-chip Li-Ion and Li-Polymer battery charge management IC designed for space-limited portable applications. Typical use cases include:
- Portable Medical Devices : Glucose meters, portable monitors, and wearable health trackers benefit from the IC's compact package and precise charge termination
- Bluetooth Headsets & Wearables : Supports trickle charging for deeply discharged batteries and includes thermal regulation for safe operation in body-worn devices
- Handheld Industrial Scanners : Robust charging solution for devices requiring frequent charge cycles in demanding environments
- Smart Home Devices : Wireless sensors and IoT endpoints requiring reliable battery maintenance during intermittent power availability
- Portable Consumer Electronics : MP3 players, digital cameras, and handheld gaming devices where space constraints are critical
### Industry Applications
- Medical Technology : Compliant with medical device safety standards when implemented with proper isolation
- Consumer Electronics : Mass-market portable devices requiring cost-effective battery management
- Industrial Automation : Portable data collection terminals and measurement instruments
- IoT and Edge Computing : Battery-powered sensor nodes and gateway devices
- Automotive Accessories : Aftermarket portable devices (not for primary vehicle systems)
### Practical Advantages and Limitations
Advantages:
- High Integration : Combines power path management, charging circuitry, and protection features in a single 2.5mm × 2.5mm package
- Thermal Regulation : Automatic charge current reduction prevents overheating without external components
- USB Compatibility : Supports 100mA and 500mA USB enumeration modes
- Low Power Consumption : 35μA typical operating current extends battery life
- Safety Features : Includes battery temperature monitoring, charge safety timer, and overvoltage protection
Limitations:
- Fixed 4.2V Charge Voltage : Not suitable for high-voltage Li-ion chemistries (4.35V/4.4V cells)
- Maximum 800mA Charge Current : Insufficient for high-capacity batteries requiring fast charging
- No Wireless Charging Support : Requires separate circuitry for inductive charging applications
- Single Chemistry Support : Optimized specifically for standard Li-Ion/Li-Polymer batteries
## 2. Design Considerations
### Common Design Pitfalls and Solutions
Pitfall 1: Inadequate Thermal Management
- Problem : Excessive temperature rise during charging reduces efficiency and component lifespan
- Solution : Ensure adequate copper pour around thermal pad and consider thermal vias for heat dissipation
Pitfall 2: Input Voltage Transients
- Problem : USB hot-plug events or adapter insertion can cause voltage spikes
- Solution : Implement input TVS diode and ensure proper input capacitance (typically 10μF ceramic)
Pitfall 3: Battery Connection Issues
- Problem : Intermittent battery connection can cause false charge termination
- Solution : Include battery detection circuitry and implement proper connector strain relief
Pitfall 4: Grounding Problems
- Problem : Poor ground layout leads to noise and inaccurate current sensing
- Solution : Use single-point grounding for analog and power sections with star configuration
### Compatibility Issues with Other Components
Power Management ICs:
- Compatible with most low-power DC-DC converters and LDOs
- Ensure system load sharing doesn't interfere with charge termination detection
Microcontrollers:
- I²C-compatible STAT and PG outputs for host monitoring
- 3.3V logic level compatible control inputs
Battery Protection Circuits:
- Works with standard 2-series or 3-series protection ICs
- May require additional circuitry if battery pack includes integrated protection
USB Transceivers:
- Compat
