Check Adapter With High Quality

power adapter reliability thermal design

For power adapters in addition to electrical stress, temperature is the most important factor affecting the reliability of the device. Temperature rise within the power supply equipment will lead to component failure, when the temperature exceeds a certain value, the failure rate will increase exponentially, the temperature exceeds the limit value will lead to component failure. Foreign statistics show that the temperature of electronic components rises every 2 ℃, the reliability of a 10% drop in temperature rise of 50 ℃ when the life expectancy is only 25 ℃ when the temperature rise of 1/6. need to take measures to limit the chassis and components of the temperature rise in technology, which is the thermal design.

The principle of thermal design of the power adapter, one is to reduce the amount of heat, that is, the choice of better control methods and technologies, such as phase-shift control technology, synchronous rectification technology, etc., the choice of low-power devices, reduce the number of heat-generating devices, increase the width of the coarsening of the printed line, to improve the efficiency of the power adapter. The second is to strengthen the heat dissipation, that is, the use of conduction, radiation, convection technology to transfer heat, which includes the use of heat sinks, air-cooled (natural convection and forced air-cooled), liquid-cooled (water, oil), thermoelectric cooling, heat pipes and other methods. Forced air-cooled heat dissipation than the natural cooling of more than 10 times, but to increase the fan, fan power, interlocking devices, etc., which not only makes the cost and complexity of the equipment to increase the reliability of the system decreased, but also increased noise and vibration, and therefore, in general, should try to use the natural cooling, rather than air-cooled, liquid-cooled cooling methods, etc., in addition to component layout, air cooling (natural convection and forced air cooling), liquid cooling (water, oil), thermoelectric cooling, heat pipe and other methods.

In addition, in the layout of components, heat devices should be placed in the downwind position or in the upper part of the printed circuit board, the radiator using oxidized black process to improve the radiation rate, do not allow black paint coating. Spraying three-proof paint will affect the heat dissipation effect, need to appropriately increase the margin. Radiator mounting device plane requires smooth and flat, generally coated with silicone grease on the contact surface to improve thermal conductivity. Transformers and inductor coils should be selected thicker wire to inhibit temperature rise.

EAHUNT power adapter manufacturer adheres to the principle of quality first, each power supply product will undergo 100% aging test, 3 times function detection test, to ensure that the factory pass rate of 100%. Product life can reach 100,000 hours, to meet the 10,000 times plugging and unplugging without failure standard, military quality, trustworthy.