The many applications of electronic equipment in automobiles have caused the power management and power supply systems for automobiles to become more advanced and complex, making the issue of power management the biggest challenge for the automotive design side.
If more than two electronic devices are mounted in a car at the same time, it will cause a lot of burden on the car's electricity, power consumption and other energy consumption; therefore, the car has more and more stringent requirements for power consumption. Automotive electronic devices require high-efficiency, space-saving, and high-voltage power supplies that can output large currents. However, the problem is that high-voltage, large-current single-chip step-down converters cannot control the required load current. In fact, strictly speaking, this is due to the "performance" requirements of the main body of the car and the additional electronic systems, and these requirements have greatly changed from the "performance" requirements of traditional cars.
When facing the problem of automobile electric energy, automobile design engineers will first consider and design different system functions separately, for example: advanced electronic engines, generators, driving computers, safety control systems, and DVD multimedia audio-visual systems , Firstly design in a stand-alone way, and finally carry out the integrated action. For now, most of the mid-to-high-end cars produced today have GPS satellite navigation systems based on DVD technology; however, designing such a power supply system that can handle different voltage gateways is complicated and Designing a laptop power supply system is just as difficult. Therefore, a new application technology has been developed to control the power supply on the car within the optimal range, so that the electronic equipment on the car can be in the best condition as soon as the vehicle is driving.
NCP5810 is a 2W dual-output DC/DC converter that provides positive and negative output voltages. The component's output voltage is accurate, high switching frequency and small size package. Since automotive electronics are very sensitive to changes in supply voltage, NCP5810 provides accurate feedback voltage with only 1% voltage tolerance and fast line transient response, and when the input voltage fluctuates 500 millivolts (mV), the transient overshoot voltage Only 4 mV.
The NCP5810 itself is characterized by a power supply efficiency of up to 85% at a frequency of 1.75 megahertz (MHz). The NCP5810 dual-output DC-DC converter provides excellent performance. In order to complement the slim profile of the AMOLED display, the converter can convert to a high frequency of 1.75 MHz and can use smaller inductors and ceramic output capacitors. Its 0.55 mm thick ultra-thin package enables NCP5810 to be used in the design of thinner automotive electronic products. Its power-off function in shutdown mode limits the display leakage current to 1 microampere (uA), saving power in the shutdown state Power supply for car battery.
Linear Technology─LTC2970The LTC2970 is a dual-group I2C power supply monitoring and surplus controller designed specifically for power supply digital management of high-availability systems. It provides an optimized combination of digital and analog for digital power management used by automotive electronics. Its I2C digital interface, 14-bit ADC, high-precision reference and current output DAC provide digital power supply designers with digital control of analog power supply. The LTC2970 can be used with almost any power supply in the car to provide output voltage and fast transient response smooth control with an analog control loop, allowing designers to choose the optimal DC-DC converter.
The LTC2970's superior accuracy integrates all necessary functions in a compact 4mm x 5mm QFN package, and enables it to accurately control the output voltage of each power supply under a wide range of operating conditions. In addition, user-configurable error monitoring improves reliability by providing initial warnings before failures occur to the system host. The architecture of the LTC2970 has been selected for the averaging processing of power supply noise, so that the LTC2970 can ignore fast-changing transient signals. The load point of the DAC output is referenced to ground, reducing the possibility of power system bounces from the ground. Error; by selecting two resistance values, the user can select the appropriate resolution to provide an important hardware range limit. When this range is exceeded, the power supply cannot be driven.
Texas Instruments-TPIC74100-Q1This DC/DC converter TPIC74100-Q1 can operate in a wide input voltage range between 1.5V and 40V without the need for external components to simplify the design. The component is built with a frequency modulator and adjustable slew rate, which can minimize the electromagnetic interference (EMI) in the system, and can automatically switch the buck-boost mode to provide 5V stable and adjustable output voltage.
Other key features of TPIC74100-Q1 include: switching mode regulator, -5V +/-2% in normal mode, -5V +/-3% in low power or crossover mode; switching frequency of 440kHz (typical) Outside the AM frequency band; the input operating range is 1.5V to 40V, 1-A load current capability, the lowest 200mA load current capability for 2V input, and the lowest 120mA load current capability for 1.5V input. The component has shutdown and low-power operation modes to optimize power saving functions, has a reset function of the surge elimination timer and programmable delay function, which can increase the stability of the system; has a programmable alarm function to provide low voltage detection And indicating function, can be designed for the enhanced thermal conductivity package for efficient heat dissipation management.
Fujitsu Microelectronics-MB39C014, MB39C015The operating frequency of MB39C014 and MB39C015 is set at a fixed 2MHz (MB39C014 can also be set to 3.2MHz). Through synchronous rectification, not only the conversion efficiency is high, but also because of the high-performance built-in MOS tube, the ripple noise and noise are effectively reduced. The influence of switching noise. And because of the built-in voltage monitoring circuit, you can choose to monitor the power supply voltage or the output terminal voltage.
Computer Case, Desktop Computer Case, Console Case,Gaming Computer Case,Boluo Xurong Electronics Co., Ltd.
Boluo Xurong Electronics Co., Ltd. , https://www.greenleaf-pc.com