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Based on MOSFET control PWM direct-current adjustable power source’s development
Wednesday, April 1st, 2009 at 13:08 | No commentsCategories: Power SupplyShort Content: Picking Wanting: Because the instrument uses power source's volume and the weight usually is restricted, for this reason proposed that one kind controls by MOSFET, and isolates by the high-frequency transformer switching power supply design method. This power source has the volume to be small, the weight is light, resistance to interference, the output voltage is stable, the accent presses the scope to be broad, the voltage dynamic response is quick, the performance-to-price ratio is high, characteristics and so on ... -
The IRIS4015 constitution’s accurate resonance instead stirs up-like the switching power supply
Tuesday, March 17th, 2009 at 05:26 | No commentsCategories: Power SupplyShort Content: IRIS4015 series brief principle The IRIS4015 series is one kind instead stirs up-like the converter specially for the standard resonance working, its biggest merit is instead stirs upthe accurate resonance -like converter's control circuit and the high-pressured MOSFET integration in a TO-220 seal, therefore does not need other establishment switching valve. IRIS4015 series's internal functional block diagram as shown in Figure 1. Figure 1 IRIS4015 series internal functional block diagram 1 electric circuit's start and the current limiting work Is ... -
TLP250 power actuation module in IRF840 MOSFET application
Saturday, December 6th, 2008 at 03:09 | No commentsCategories: Power SupplyTags: MOSFETShort Content: Abstract: Introduced the power component actuates module TLP250 the structure and the application method, has given its and power MOSFET and the DSP controller connection hardware circuit diagram. In elaborated that IRF840 in the power MOSFET switch characteristic foundation, has designed the absorbing circuit. Finally the union cocurrent cuts the wave velocity modulation technology, has designed based on the TMS320LF2407 DSP direct current motor entire digit closed loop velocity modulation system, and has given the experimental result.Key word: TLP250; IRF840 ... -
Has the direct-current constant voltage (class) electronic load key role power MOSFET - en.51rd.net
Wednesday, November 19th, 2008 at 05:12 | No commentsCategories: Power SupplyTags: MOSFETShort Content: The designers use the cocurrent electronic load to test the power source, like solar energy array or battery, but the commercial cocurrent electronic load is very expensive. So long as you use power MOSFET in its linear area, may manufacture own cocurrent electronic load (Figure 1). This load uses two simple feedback loops. MOSFET serves as under a stationary stream pattern under the current supply or the constant voltage pattern potential source. Designer when description potential source characteristic uses the ... -
Sharpens the manostat overflow protection ability MOSFET - en.51rd.net
Wednesday, November 19th, 2008 at 00:12 | No commentsCategories: Power SupplyTags: MOSFETShort Content: The classical LM317 adjustable output linear voltage regulator has the quite big electric current bearing capacity. In addition, LM317 also has the current limiting and the overheated protection function. You only need the few parts to increase a high speed short circuit current limiting electric circuit, may enhance the LM317 manostat's performance (Figure 1). Under the normal work condition, resistor R2 and R3 add to the VGS bias on IRF4905S power MOSFET Q1, the Q1 complete breakover, presents the number ... -
In big electric current portable DC/DC transformation MOSFET power loss computation - 51RD Chinese electronic net
Tuesday, October 7th, 2008 at 13:28 | No commentsCategories: Power SupplyTags: MOSFETShort Content: Abstract: Introduced in big electric current portable DC/DC the MOSFET iterative flow and the power loss computation. Key word: Portable DC/DC; Power loss; Iterative flow; Thermal resistance; Junction temperature Introduction It is well known, today's portable power source designer faces the most serious challenge is provides the power source for now high performance CPU. In recent years, essence CPU needed the supply current doubles every two years, namely the portable essence CPU supply current demand will reach as ...
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