What is a constant current power supply and a constant voltage power supply adapter?

Common to all of the power adaptor and mobile phone chargers are constant voltage switching power supply, power adapter output dc voltage is fixed, the voltage change the floating range for the output voltage of plus or minus 5%, the output of the power adapter with over voltage, over current, short circuit protection function and power, constant current Power Supply more commonly used in LED lights, as the name suggests it is the constant current output power is constant current output.When constant voltage power supply is the power adapter in the rated output current range, which is in the scope of work, the output voltage will remain within the scope of the rated voltage plus or minus 5%, when the output current is more than 1.3 2 times rated current, power adapter will keep stop working, when removing the load power can resume normal work, constant voltage power supply and regulated power supply, the required output voltage value is fixed, not with load, the external working conditions, such as the input voltage changes, the output power of the maximum output current of the power supply,There are specific requirements for working efficiency, output voltage stability, ripple coefficient, battery compatibility EMC characteristics, temperature effect, noise, impedance characteristics, etc.

Constant current power supply, also known as current regulator, less as far as we know, the grasp of the concept of relative difficult, the output characteristic curve of constant current power supply with constant voltage power supply, on the other hand, controlled parameter is the output current, the dependent variable compliance voltage, output current is kept constant in the range of load, load resistance is big, the power supply into compliance pressure limiting reserve, constant current power supply considered overvoltage conditions, generally think this area is a protected area, in the area of the output voltage is not clearly, our term to describe the constant current power supply is used in the constant voltage power supply in familiar, for variable constant current power supply, can adjust the output current,The voltage at the output terminal must change with the load resistance in order to keep the load current constant. The supply range in the output current constant zone is called 'compliance voltage'.The compliance voltage usually has a definite maximum value. The application of constant-current power supply is limited. It is generally used in situations where a constant current must be maintained within a limited range of load resistance.

Shenzhenshi Zhenhuan Electronic Co.,Ltd(www.szzhpower.com) was founded in 2008, specialize in constant voltage external Power Adaptor, ac dc adapter, Outdoor Waterproof power supply, led driver , Power Transformer , switching power supply, dimmable or non-dimmable LED Drivers and Battery Charger.