HDMI Adapter Operating Principle
HDMI Adapter Operating principle
The power adapter features: power converter (AC to DC), from AC to DC, and then through the computer, it is not to protect the computer, but the computer inside the storage of power storage (also called the charger), so In the power of the time to protect the computer.
The characteristics of the switching power supply are: through the circuit control switch tube for high-speed road through and cut off. DC into high frequency AC power provided to the transformer to transform, and then the need for a group or more than the voltage! The reason for the high frequency AC is that the power of the transformer transformer circuit is much higher than that of the 50HZ, so the switching transformer can be made very small and the operation is not very hot !! The cost is very low. If 50HZ is not high Frequency switching power supply is meaningless.
Switching power supply and adapter are switching power supply, both by the high-frequency switch and its control circuit. The power adapter is a regulated switching power supply, switching power supply with floating charge function, the voltage is smaller with the current becomes larger, to the last as long as the voltage and no current.
2, the difference:
Switching power supply is a big class. The power adapter is connected to the switching power supply.
3, operating principle:
In reality, we are exposed to the power adapter is more switching power supply. Switching power supply refers to the modern electronic technology, control switch tube registration and turn off the time ratio, to maintain a stable output voltage of a power supply, power adapter switching power supply generally by the pulse width modulation (PWM) control IC and MOSFET composition, High conversion power, small size, can work in a wide voltage range.
With the intelligent equipment in people's lives occupy an increasingly important position, with the function of the gradual increase in equipment, power consumption problems are gradually exposed, people are increasingly accustomed to carry the power adapter, that is, People often say the charger. What is the difference between this power adapter and the regulator? This article will be introduced for everyone.
Found that in the absence of load, the power adapter voltage is higher than the value of his logo, and the regulator is always the value. So what is the difference between the two?
The difference between the power adapter and the regulator
1, the power adapter is a small portable electronic equipment and electrical and electronic power supply conversion equipment, generally by the shell, power transformers and rectifier circuit, according to its output type can be divided into AC output and DC output type. Straight white can be understood as a voltage converter, such as 110-220 volts AC voltage into a fixed DC voltage.
2, the regulator is to stabilize the output voltage of the device. Regulator with constant voltage regulator, control circuit, and servo motor and other components. When the input voltage or load changes, the control circuit to sample, compare, zoom, and then drive the servo motor rotation, so that the regulator carbon brush position changes, by automatically adjusting the coil turns ratio, thus maintaining the output voltage stability.
The power adapter in the case of no load voltage is higher, if you pick up the load will find its voltage will come down, it is due to its own role is limited, just to provide a suitable voltage to the load , And the main function of the regulator is the regulator, it will be through its voltage stability in a certain range, more or less than this value it has action, the power adapter will not have this effect. The two can be differentiated according to the use of the situation, if it is in the load power requirements are not high places can be used, but if the load on the power requirements are relatively high, even if the 1V voltage changes are not OK, then you must use the regulator , Otherwise do not burn the load also burn power.