Many electronic devices in the car, resulting in power supply system and vehicle power management becomes more advanced and complex, makes power management problems will become the greatest challenge of car design port.

At the same time the automotive electronic devices carried on more than 2, consumption of electric power for cars, power and other energy depletion caused no small burden; therefore, the auto power-power requirements become more stringent. JVC BN-V11U Battery Charger Automotive electronic devices need to be efficient, space-saving and output at a high voltage and high current power supply, but the problem is the high-voltage, high-current single-chip buck converter, and can not control the desired load current. In fact, strictly speaking, this is attributed to the car body itself, and additional electronic systems to "performance" requirements, and these requirements and traditional cars on the "performance" requires a lot of changes.

In the face of the motor power issue, automotive design engineers will be classified respectively taking into account different systems function, design, for example:-advanced electronic engine, generator, the road DVD multimedia AV and computer control system, security system, in an independent way, eventually consolidating actions. And right now, today's rank to a higher order of the cars mostly carry DVD satellite navigation system based on GPS technology; however, the gateway design that can handle different voltage power supply system, its complexity and the design of portable power supply system is just as difficult. Therefore, developed a new technology, vehicle power supply can be controlled in the best range, car electronic equipment in vehicles for the first time will be able to play in top condition.

NCP5810 is 1 2W dual output DC/DC converters, providing positive and negative output voltages. The component's output voltage accuracy, small size and high conversion frequency package. Due to changes in automotive electronic power supply voltage is sensitive, NCP5810 only 1% voltage tolerance and fast line-transient response of accurate voltage and the input voltage fluctuations for the 500 Millivolt (mV), transient overshoot voltage is only 4 mV.

NCP5810 itself in 1.75 MHz (MHz) oscillator frequency characteristic of the entire power efficiency up to 85%, NCP5810 dual-output DC-DC converter provides excellent efficiency performance. Slim shape to complementary AMOLED display screen, the converter can convert to 1.75 MHz high frequency, use of Panasonic DMW-BCJ13PP Battery Charger small ceramic output capacitors and inductors. Its thickness of 0.55 mm ultra thin package, the NCP5810 in the design of automobile electronic products for thin, it is in shutdown mode power off function, leakage current limits will be displayed in 1 mini (uA), shutdown state car battery power savings.

LTC2970 is specially designed for high-availability power supply system of digital management, designed two-I2C monitoring and ample power supply controllers, in order to let the car used in electronic digital provides digital and analog power management can have a combination of the best of. The I2C digital interface, 14-bit current output DAC and ADC, high-precision reference, required to provide digital power supply designers: simulation of digital control of power supply. LTC2970 almost any power supply and car meet, to 1 analog control loops to provide smooth control of output voltage and fast transient response, enabling designers to choose the best of DC-DC converters.

LTC2970 superior precision and accuracy, a tight integration of all the necessary functions of 4mm x 5mm in the QFN package, and make it to the wide range of operating conditions, can accurately control the output voltage of each power supply. In addition, user configurable error monitoring, through to system host provides early warning of failure before it happens to improve reliability. LTC2970 of schema, is selected for power supply noise of average of processing, so makes LTC2970 can ignored fast changes of instantaneous signals, its DAC output of load points grounding reference, reduced has may occurs in suffered grounding end rebound of power system of errors; by select 2 a resistance value, using who can select for of resolution, to provides 1 a important of hardware range limit, dang over this range Shi, power supply will cannot is drive.

The DC/DC converters between TPIC74100-Q1 between 1.5V and wide input voltage range operation, without the need for external components to make design more simplified. The component and the establishment of a frequency modulation and the rotation rate can be adjusted, within the system of electromagnetic interference (EMI) to minimize, and automatic switching buck-mode to provide a stable 5 v regulated output voltage.

TPIC74100-Q1 other key features include: switch mode regulator, -5V+/-2% in normal mode, low power or a crossover model of -5V+/-3%;440kHz (typical) outside of the switching frequency on the AM band; input operating range 1.5V to 40V,1-A load current capacity, lowest to 2V 200mA load current of Nikon EN-EL5 Battery Charger  the input capacity, lowest to 1.5V enter 120mA load current capability. The components have closed and low-power operation to optimize power savings feature, surge elimination of timer with programmable delay feature reset function, can increase the stability of the system; with programmable alerts provide low voltage detection and indication function, enhanced thermal conductivity package for efficient thermal management design.

MB39C014 and MB39C015 operating frequency is set at a fixed 2MHz (set 3.2MHz MB39C014), synchronous rectification, not only high conversion efficiency, also carry the high-performance built-in MOS tube, very effective to reduce the ripple effect of switching noise and noise. And thanks to built-in voltage monitoring circuit, monitoring power supply voltage or output voltage can be selected.

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