NTC thermistor is a ceramic semiconductor heat-sensitive crystal sintered from various metal oxides mainly composed of manganese, cobalt and nickel. It is highly sensitive to temperature changes, and its zero-power resistance value varies with the body. The temperature increases and decreases, and the resistance value decreases exponentially with the increase of temperature, and the temperature coefficient is as high as (36 percent / degree ), and a small temperature change will cause a large resistance value change.
With the development of mobile communication technology and the trend of digitization, the requirements for miniaturization, light weight, thinning, digitization and multi-function and automation of production process put forward for electronic equipment, the development and production of electronic components must also be miniaturized, chip type The rapid development of thinning and thinning. The trend of chip-type electronic components has also extended to the sensor field, and chip-type thermistor is a sensitive component that has been greatly developed in accordance with this trend.
NTC chip thermistors are divided into chip NTC thermistor products and chip NTC thermistor products. Chip NTC thermistor products are used for chip mounting on circuit boards. The development of performance has far exceeded that of traditional discrete thermistors. Let's talk about the characteristics of NTC thermistor series products.
They are characterized by:
1) Small size, no lead, excellent welding performance, suitable for high-density surface mount;
2) The surface of the porcelain body is encapsulated by glass, which has good moisture resistance, high reliability and stability;
3) Wide operating temperature range: -40 degree - plus 125 degree , with excellent solderability and thermal shock resistance;
4) High-precision resistance value and B value constant;
5) Suitable for wave soldering and reflow soldering;
NTC chip thermistors have a wide range of applications and can be widely used in displays and general-purpose electronic circuits, such as:
1) Temperature measurement: electronic thermometer, electronic perpetual calendar, electronic clock temperature display, electronic gifts, etc.;
2) Temperature control: temperature sensing of rechargeable batteries of mobile phones, car phones, notebook computers, smart wearable devices and other equipment;
3) Temperature compensation: in various circuits that require temperature compensation, such as semiconductor integrated circuits, liquid crystal displays, transistors, ICs and crystal oscillators of mobile communication equipment.
4) Installed in the axial flow electrode, such as the micro motor in the computer, the focusing motor of the camera lens and other equipment to control the motor speed;
5) Control the temperature of the print head during printing to prevent overheating; in the servo controller of the floppy disk and the driver of the pocket player, to prevent misreading of data and so on.
