Bluetooth headset NTC circuit and applicable models

　　Bluetooth technology has low power consumption, strong anti-interference ability, is suitable for a variety of communication places, and the integrated circuit is relatively simple, so Bluetooth technology. And bluetooth headset is the best application, I believe everyone must have at least a pair of bluetooth headset now.

　　In addition to low cost, low power consumption, and simple peripheral circuits, the chips applied to Bluetooth headsets are also very important to provide complete software development tools and small chip packages. Let's take a look at the introduction of the main chip NTC suitable for Bluetooth headsets.

　　NTC mainly plays the role of thermal protection and overcurrent protection in Bluetooth headsets. The most commonly used is PVC# double-spliced line NTC thermistor.

　　Features of PVC# double-strand NTC thermistor

　　1. High measurement accuracy

　　2. Tight tolerances for resistance and Beta values.

　　3. Fast response and small size.

　　4. It can run stably for a long time.

　　5. The rated resistance of 25C can be 1kΩ~1000kΩ.

　　6. Common resistance values at 25°C are: 1kΩ, 2kΩ, 2.252Ω, 3kΩ, 4.7kΩ, 5kΩ, 6.8kΩ, 10kΩ, 15kΩ, 20kΩ, 30kΩ, 40kΩ, 47kΩ, 50kΩ, 100kΩ, 150kΩ, 1000kΩ, etc.

　　7. Dissipation factor: ≥3.0mW/C in still air.

　　8. Thermal time constant: ≤12 seconds in still air.

　　9. Operating temperature range: -45°C - + 105°C.

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