Power Supply Dimension
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 Dell Dimension 5100c 5150c GX520 GX620 XPS 200 SFF 220 Watt Power Supply YD358  US $17.99
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 GENUINE DELL Power Supply DIMENSION 4400 4600 8200 8250 US $18.99
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On The Power Industry And Power Technology Development Trends (2)
3. Concerned about the level of EMC design
Power supply designers should know that EMC is specializing in a limited space, time, and under the conditions of spectrum resources, a variety of electrical and electronic equipment can coexist without causing performance degradation of specific subjects. This science is accompanied by high frequency radio electronics, particularly the development of high-frequency applications developed. EMC has its real meaning: one is the equipment or system to produce the electromagnetic disturbance, peripheral equipment should not cause interference can not bear, nor the surrounding environment should not bear the "pollution"; the other equipment or system to the surrounding environment from electromagnetic interference should have sufficient resilience. To do this, very difficult, designers must learn and a lot of practice, a profound understanding of EMC standards and ways to interfere with other, take effective measures to increase the EMC design. Such as: additional power filters, passive compensation to the new program, effectively suppress the conduction disturbance; plus a variety of screening measures to contain the radiation interference; plus RC absorb the appropriate parts of the network in circuit switching absorption peak, using a variety of soft-switch technology, and ensure the zero voltage power switching devices turn, zero current, turn-off to reduce the high current and voltage gradient caused by severe electromagnetic interference. Rational design of PCB, a reasonable ground layout will reduce the electromagnetic interference, in short, the current rapid development of electromagnetic compatibility technology, electromagnetic compatibility requirements of users will be rising, it is the power supplier to pay more attention.
4. Complete protection
At present, the power supply used in more expensive devices, the control circuit is also more complex, other power loads are generally a large number of highly integrated devices, which devices are generally well tolerated electricity, heat, impact less capable . Power to protect both itself and the load to be safe. Currently many different types of protection, such as: polarity protection, program protection, overcurrent protection, overvoltage protection, undervoltage protection, thermal protection, such protection is commonly used several. As the current supply of many types, uses extremely broad, so the protection requirements of different emphases, by request. Added a protection for the power circuit, the device is bound to increase, in turn, would affect the reliability of the system, for its own protection circuit required reliability must be high in order to improve overall system reliability, and thus improve the power supply itself MTBF This requires strict protection of logic, simple circuit elements at least, Chucierwai also consider the failure to protect the circuit itself, the maintenance of degree, to ensure the normal operation of the power and reliability.
(B) the main way to reduce costs
1. Advanced product design management mode, shortening product development cycles.
2. Strengthen the full quality consciousness, the quality of products across the design and manufacturing process, and strive to product a 100% pass rate, 100% to ensure contract performance and customer satisfaction 100%.
3. Performance power products to meet the job requirements of the user is appropriate, not excessively high targets and the pursuit of rational choice of components, raw materials, cost as much as possible.
4. Emphasis on human resource management, and take people-oriented way. Not only to cultivate respect and care for people, but also rational allocation and use, effectively play its role, not a waste of human resources.
5. The greatest amount of information and credibility increase market share and financial recovery.
Third, high frequency, high efficiency, low voltage, standardization is the main trend of switching power supply
(A) the structure is moving in the package, thin, thin and even direction of
Previous standard module height is 0.5 inches, most recently this has dropped to 0.375 inches high, thin package size general customer requirements as 7.5mm (0.295 ), 8.5mm (0.335 inch) and 10mm (0.394 inches). Become the international standard size dimensions, mostly 1 / 8, 1 / 4, 1 / 2, 3 / 4 and full-brick structure, the output terminal compatible design has become increasingly evident. Internal control circuit module tend to use digital control, non-isolated DC-DC converter growing faster than the isolated, distributed power faster than the centralized power development.
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