The high-frequency of LED switching power supply is the direction of its development, which miniaturizes the switching power supply and enables it to enter a a wider range of applications, especial in the high-tech field, promoting the the miniaturization and portability of high-tech products. In addition, the development and application of switching power supplies are of great significance in energy conservation, resource conservation, conservation, i environmental protection. The electronic devices used in LED switching power supply uglavnom include LED diodes, IGBTs, and MOSFETs. SCR has a small number of applications in rectifier circuits and soft start circuits of switching power supplies, making it difficult to drive GTR with low switching frequency and postupno being replaced by IGBT and MOSFET.
The razlika između LED prebacivanje napajanje napajanje i obični prebacivanje napajanje napajanje
LED prekidač napajanje opskrba: 1. It is required to have constant struja. 2. Low temperature, low heat, and long lifespan. 3. Small volume. 4. Vodootpor, antikorozivna, i antistatična. 5. High frekvencija zagađenje. Ordinary Switching power supplies have severe high-frequency pollution, and even with inductance and large capacitance filtering, the waveform of the output DC is very complex. Poor power supply, the power supply itself may not be bad, but the LED lifespan and light atnuation are Largely reduced.
The LED prekidač napajanje opskrba krug je zapravo komponirano of a prekidač napajanje opskrba krug i a povratna informacija krug. The feedback circuit samples from the load and adjusts the pulse duty cycle or frequency of the switch circuit to the purpose of controlling the out out of the switch circuit.
Having said so much, since LED switching power supply is so good, what are the conditions for producing it?
Tri uvjeti za LED prebacivanje napajanje napajanje
1. Prekidač: Napajanje elektronički uređaji operate in a prekidač država radije than a linear stanje
2. Visoka frekvencija: Snaga elektronički uređaji operativno at visoko frekvencije radi than near power frekvencije
3. DC: Prebacivanje napajanje pomagala izlaz DC umjesto toga izmjena
