What are the aspects of application of NTC thermistor in Nanjing Shiheng Electronics mobile core controller? NTC in NTC thermistor is the abbreviation of Negative TemperatureCoefficient, which means negative temperature coefficient. The so-called NTC thermistor is a negative temperature coefficient thermistor. It is made of metal oxides such as manganese, cobalt and copper as the main materials, and is made using ceramic technology. These metal oxide materials all have semiconductor properties because their conductive methods are completely similar to semiconductor materials such as germanium and silicon. When the temperature is low, the number of carriers (electrons and holes) in these oxide materials is small, so the resistance value is high; as the temperature increases, the number of carriers increases, so the resistance value decreases. The variation range of NTC thermistor at room temperature is 100~1000000 ohms, and the temperature coefficient is -2~-6.5. NTC thermistors can be widely used in temperature measurement, temperature compensation, surge current suppression and other occasions. NTC thermistor is used for AMD Turion mobile CPU core controller temperature rise control. ntersil’s new R3 controller uses post-package trimming to eliminate all package-related errors and is capable of 0.5 accuracy over temperature, the highest accuracy in the industry. The device uses 2 interleaved channels to double the output voltage ripple frequency and reduce the output voltage ripple amplitude, while reducing the number of components, reducing component costs, reducing power consumption and shrinking the actual circuit board. Nanjing Shiheng SL6264 is a two-phase controller with integrated gate driver. The core of the ISL6264 lies in patented R3 technology - Intersil's powerful ripple regulator (Robust Ripple Regulator) modulator. Compared with traditional polyphase controllers, the ISL6264 can achieve faster transient response because the R3 modulator is able to change the switching frequency during load transients.
To extend battery life, Intersil's ISL6264 supports PSI_L by automatically enabling different operating modes. In operating mode, if the load is heavy, the controller will command bi-phase continuous conduction mode (CCM) operation. When PSL_L is asserted in deeper sleep modes or light load operating modes, the ISL6264 disables one phase and operates in single-phase diode commutation mode (DE) to improve efficiency at light loads. A 6-bit digital-to-analog converter (DAC) dynamically adjusts the core output voltage from 0.375V to 1.55V. In operating mode, the ISL6264 can achieve a system accuracy of 0.5 for the core output voltage over the entire temperature range. A unity gain differential amplifier is also provided to enable remote CPU chip temperature sensing. This allows the voltage on the CPU chip to be accurately measured and adjusted as required by AMD's mobile CPU metrics. Current sensing can be achieved using lossless inductor DCR sensing or precision resistive sensing. A single NTC thermistor network can thermally compensate for the time constant of gain and DCR changes.