High-Efficiency Linear Battery Charger for Single-Cell Li-Ion Applications
De BQ24075 is a highly integrated and space-efficient linear battery charger from Texas Instruments (TI), designed specifically for single-cell Li-Ion and Li-Polymer battery-powered applications. This device is ideal for portable electronics requiring a reliable, compact, and thermally optimized charging solution. With its advanced power path management and dynamic power source selection, it ensures seamless operation and battery safety under varying input conditions.
Technical Overview and Key Features
Engineered for precision and safety, the BQ24075 supports USB and AC adapter inputs, offering dynamic power path management (DPPM) to prioritize system load while charging the battery. The device integrates power FETs, reverse blocking protection, high-accuracy current and voltage regulation, and thermal regulation to prevent overheating. It also includes safety timers and fault indicators for robust system protection.
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Belangrijkste kenmerken:
- Input source: USB port or AC adapter
- Dynamic Power Path Management (DPPM)
- Integrated power FETs and reverse current protection
- Thermal regulation and safety timers
- Charge status and fault indication
- Programmable charge current up to 1.5 A
- Battery temperature monitoring via NTC thermistor
Technical Specifications
| Parameter | Waarde |
|---|---|
| Ingangsspanningsbereik | 4.35 V to 6.5 V |
| Charge Voltage | 4.2 V ±1% |
| Charge Current | Up to 1.5 A (programmable) |
| Battery Regulation Voltage | 4.2 V |
| Bedrijfstemperatuurbereik | –40°C to +125°C |
| Pakket | QFN (4 mm × 4 mm) |
| Power Path Management | Yes (DPPM) |
| Safety Timers | Pre-charge and fast-charge timers |
| Battery Temperature Monitoring | Yes (NTC thermistor input) |
Why This Charger Outperforms Conventional Solutions
Compared to standard linear chargers, the BQ24075 offers a superior combination of efficiency, thermal performance, and system reliability. Its integrated Dynamic Power Path Management (DPPM) ensures that the system load is powered directly from the input source while simultaneously charging the battery. This eliminates the need for external power switches and reduces board space.
Additionally, the device’s thermal regulation feature actively monitors and adjusts the charge current to prevent overheating, a critical advantage in compact, high-density designs. The programmable charge current and built-in safety timers provide flexibility and protection, making it ideal for a wide range of portable applications.
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Industry experts and engineers consistently recommend this charger for its robust feature set and proven reliability in real-world applications. Its integration of multiple protection features and compact QFN package make it a preferred choice for OEMs seeking to optimize performance and safety in battery-powered systems.
Typische toepassingen
- Smartphones and feature phones
- Wearable electronics
- Portable medical devices
- Bluetooth headsets and accessories
- Handheld industrial tools
- Digital cameras and camcorders
About Texas Instruments (TI)
Texas Instrumenten is a globally recognized leader in analog and embedded processing semiconductor solutions. With decades of innovation and a commitment to quality, TI delivers high-performance components that power a wide range of industrial, automotive, and consumer electronics. The BQ24075 is part of TI’s extensive portfolio of battery management solutions, trusted by engineers worldwide for their reliability, integration, and performance.
Contact
Veelgestelde vragen (FAQ)
1. What type of batteries is this charger compatible with?
The device is specifically designed for single-cell Li-Ion and Li-Polymer batteries. It provides accurate voltage and current regulation to ensure safe and efficient charging of these battery types.
2. Can this charger be used with both USB and AC adapter inputs?
Yes, it supports both USB and AC adapter inputs. The integrated power path management allows seamless switching between power sources while maintaining system operation and battery charging.
3. How does the thermal regulation feature work?
The thermal regulation function monitors the device temperature and dynamically reduces the charge current if the temperature exceeds safe limits. This prevents overheating and ensures long-term reliability.
4. Is the charge current adjustable?
Yes, the charge current is programmable up to 1.5 A. This allows designers to tailor the charging profile to match specific battery capacities and application requirements.
5. What safety features are included in this charger?
The charger includes multiple safety features such as pre-charge and fast-charge timers, battery temperature monitoring via NTC thermistor, reverse current protection, and fault indication outputs.
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