Q:Explain several protection of switching power supply OCP; OLP; OVP; OTP; ESD; UVLO

In order to switch the power supply stability and reliability, usually set many types of protection.

Q:Is the DC power supply a switching power supply?

Yes! Modern switching power supply there are two: one is the DC switching power supply; the other is the AC switching power supply. DC power supply that is DC power supply, is to maintain a stable current in the circuit device. Such as dry batteries, batteries, DC generators and so on. DC power supply has positive and negative two electrodes, the potential of the positive pole is high and the potential of the negative electrode is low. When the two electrodes are connected with the circuit, the potential difference between the two electrodes can be kept constant, so that the positive electrode Negative current.

Q:Why some switch power there are two switch tube? Two transformers, one big and one small series

Because depending on the design requirements, the switching transformer can be oscillating and output a common transformer, or it can be oscillating and outputting two separate transformers. General small switching power supply (such as razor charger, cell phone charger, etc.), are a transformer, and require a higher power (such as computer power), is the two transformers. Switching transformers need to oscillate and output, the two circuits are single transformer transformer single switching power supply; separate use of the two transformer switching power supply. Switching power supply (switch: Power Supply), also known as switching power supply, switching converter, is a high-frequency power conversion device. Its function is a standard voltage, through the different forms of architecture to convert the user to the required voltage or current.

Q:What is the flashing time in the switching power supply?

Blanking time intuitively speaking, in this period of time the controller does not move. For example, IC current detection pin, whenever the power MOSFET to open a current sense resistor is not inevitable to produce a peak voltage.

Q:Led lights switching power supply controller how to repair

Check the power input terminals of the rectifier diodes, high voltage filter electrolytic capacitors, inverter power switches and other components are not breakdown, open circuit and damage. But also to see the various components on the circuit board to see whether the appearance of these components without burning paste, with or without electrolyte overflow and so on. With a multimeter to measure the secondary original, excluding high-frequency rectifier diode breakdown, load short-circuit situation, if this time the output is zero, then you can certainly be the power of the control circuit is a problem. Then you can use the static measurement of the corresponding components to check out the damaged components.

Q:How to solve the switching power supply MOS tube and transformer temperature rise is too high

Switching power supply in the main components of the semiconductor switch tube, power diodes, high-frequency transformers, filter inductors and so on. Different devices have different methods of controlling calorific value. Power tube is a high-frequency switching power supply in one of the larger heat, reduce its heat, not only can improve the reliability of the power tube, and can improve the reliability of switching power supply, improve the average time between failures (MTBF)

Q:What is the difference between an open switching power supply and an ordinary switching power

Open-type switching power supply generally refers to no sealed shell, and can be cooled by natural air-cooled, all the wind a program to do the power of open switching power supply can do more

Q:Output 12V2A switching power supply, I would like to change to 12V5A, is not the transformer changed on the line

Not to change the transformer, but should be the transformer capacity increases

Q:Who can help me choose a switch power supply model 220V AC / 10V DC

20VAC is the input voltage, 10Vdc is the output voltage ah! There is no model of the power is this specification, are designed according to the needs of this!

Q:Switching power input is marked with 220V AC, 36V output, but the actual input voltage is 238V, the output of the switching power supply affect it? Will it damage the switching power supply? Do not know the reason is not the voltage, power after a period of time (10 minutes), the switch power suddenly no output, and the display is not bright, switching power is not already broken? Guiqiu prawn to the doubts!

238V on the open power supply no effect, the general AC85-265V; What is the load on your switching power supply? Will it be the cause of the load? The indicator light does not shine is likely to switch the power supply is broken, or that is the input power is cut off,