LED Switching Power Supply Overview
LED switching power supply is a new type of switching power supply controlled by pulse width modulation (PWM) technology, by the circuit to control the switching tube and high-speed road pass and cut-off. LED switching power supply in the application of electronic devices are: LED diodes, IGBT and MOSFET.
Overview of LED switching power supply
LED switching power supply is to convert DC into high-frequency alternating current to the converter for the transformer, so that it produces the required one or more sets of voltage. Converted to high-frequency alternating current is the reason that high-frequency alternating current in the transformer circuit is more efficient than the utility 50Hz or 60Hz. Therefore, the switching power supply transformer can be done in a very small size, in the switching power supply work will not be very hot, the price of the product is lower than the industrial frequency DC regulated power supply. If not 50Hz or 60Hz into high-frequency electricity, then the switching power supply does not make any sense. Switching power supply can be roughly divided into isolated and non-isolated these two, is isolated must have a switching power converter, and not isolated may not necessarily have a switching power converter. Switching power supply compared with the traditional DC power supply has the advantages of small size, light weight, and high efficiency.
LED switching power supply high-frequency is the direction of its development, high-frequency switching power supply miniaturisation, and switching power supply into a wider range of applications, especially in the field of high and new technology, to promote the miniaturisation of high-tech products, lightweight. In addition, the development and application of switching power supply is of great significance in saving energy, saving resources and protecting the environment.
The principle of LED switching power supply
The AC voltage input to the LED switching power supply is rectified and filtered to produce a DC voltage of about 300V. Under the control of the special chip, the transformer and switching devices in the circuit produce a high-frequency square-wave voltage, which outputs a high-precision, highly stable DC voltage after passing through a high-power rectifier.
LED switching power supply features
1,Small size and light weight.
2, wide operating voltage range: input voltage can be 170-264V within the normal operation.
3, safety, high reliability.
4,Protection function: short circuit, over-current, overheating protection.
5, excellent working performance: high-power switching power supply has 5-10 seconds of delay detection circuit design, can well eliminate the power supply power on the instant output unstable high voltage, thus can prevent the load from the impact of high voltage (especially LED light source, can minimise the working voltage due to sudden changes in the light failure).
6, easy to install: the product is designed to be rainproof (outdoor) and not rainproof (indoor) two. The rainproof power supply adopts high strength, rust-proof metal shell hanging structure design, can be installed anywhere hanging, reduce the input and output of the connecting wires.
7, when the load is too large, the power supply will be protected, intermittent on and off abnormal state, at this time the load should be reduced.
