What power supply is waterproof power adapter?
Waterproof power explanation!
What is the waterproof power adapter?
Waterproof power refers to the use in dust waterproof level IP6 cases, with short circuit, over current, overload and other multiple protection.
So what is dust waterproof level?
Dust-proof waterproof level IP67 (
Security dustproof, immersed to 15 cm to 1 m working)
High power factor;
With short circuit, over current, overload and other multiple protection.
1, according to the drive mode can be divided into two types: (
Constant flow, constant current drive circuit, the output current is a constant, and the output dc voltage is different with the size of the load resistance within a certain range, load resistance is small, the output voltage is low, the greater the load resistance, the higher the output voltage.
B, does not fear the load constant current circuit short circuit, but it is forbidden to load completely open.
C, LED constant current drive circuit drive is ideal, but the price is relatively high.
D, should pay attention to use maximum current and voltage, it limits the use of the LED quantity;
Voltage type a, when the voltage regulation circuit, to determine the various parameters of the output voltage is fixed, and the output current is as the load increase and decrease and change;
B, regulating circuit are not afraid of open load, but it is forbidden to load completely short circuit.
C, with voltage driving circuit to drive the LED, each string need to add the appropriate resistance can make average a string of LED display brightness;
D, brightness will be affected by rectification of voltage change.
2, according to the circuit structure mode classification (
Resistor, capacitor step-down method: through capacitance step-down, when used in flashing, as a result of the action of charge and discharge, through the LED current is great, easy to damage the chip.
Vulnerable to the influence of power grid voltage fluctuation, low power efficiency and low reliability.
Resistance step-down method: through resistance step-down, by the interference of power grid voltage change is bigger, it is not easy to make it regulated power supply, step-down resistance consumes a large part of energy, so this way of electricity power efficiency is very low, and reliable of the system is also lower.
Conventional transformer step-down method: the power of small size, weight, overweight, power efficiency is low, usually only 45% ~ 60%, so general rarely use, reliability is not high.
Electronic transformer step-down method: low power efficiency, voltage range is not wide, general 180 ~ 240 v, moire interference.
RCC step-down way: switch power supply voltage range is wide, power efficiency is higher, generally can be 70% ~ 80%, is widely used.
Due to this kind of control mode of oscillation frequency is discontinuous, switching frequency is not easy to control, load voltage ripple coefficient is big, abnormal load adaptability is poor.
PWM control mode switching power supply, mainly composed of four parts, the input rectifier filter parts, the output rectifier filter, PWM voltage stability control part, switch part of energy conversion.
The basic working principle of PWM switching voltage stabilizer is changes in input voltage, the parameters of internal and external load, the control circuit by the control signal and reference signal difference of closed loop feedback, adjust the main circuit switching device turn-on, the pulse width of the makes switch power supply output voltage or current stability (
The corresponding manostat or constant current power supply)
High power efficiency, generally can be 80% ~ 90%, the output voltage and current is stable.
Generally this circuit has perfect protection, high reliability of power supply.
Application: mainly for the LED lamp, LED lights, LED lights, LED bulbs, LED buried lights, LED ceiling lamp, LED flat light, LED wash wall lamp, etc all kinds of LED lamps and lanterns to provide driving skills.
Its most important characteristic is waterproof, can be used in outdoor, and not afraid of rain, the fog, the sun point-blank bad environment, etc.