#high electric current

[ashwor-blog]

It is that thickness 2525 is 3.0 millimetres of new ultrathin devices that Vishay introduces the area of position occupied

A few days ago, it was 2525 that Vishay claimed to put out the area of position occupied, the thickness was only 3.0 millimetres and had 1.0& micro; H- 22 µ H The new device of the inductance, thus has expanded inductor series IHLP of its ultrathin, high electric current.

Rely on capsulating lowest DCR/&micro in the size classification respectively; H, these new IHLP inductors become and face the stabilizator module (VRM) in the terminal products And run to direct-flow converter applied small-scale high performance, low power consumption solution continuously, these terminal products include the movable termination of new generation; Notebook computer, desk-top computer, server, display card, walkie game apparatus, personal navigation system, personal multimedia apparatus and car system; Ultrathin high electric current power and load are clicked (POL) Converter; Distributed power system; Field programmable gate array (FPGA) .

Vishay Dale IHLP‑ 2525CZ‑ Inductor area of position occupied 11 is small, it is only * 0.270 inches [* 6.86 millimetres for 6.47 millimetres ] for 0.255 inches, and have the ultrathin thickness of 0.118 inches [3.0 millimetres ]. Like super-thin IHLP device, the area of position occupied of these devices is standard 2525, and can offer more high rated current and lower DCR value.

The saturation current rage specifications of these new devices are 2.5A- 9.5A, the typical DCR value range is the 7.6m&-#; 8486; -128.9mΩ ,The largest DCR value range is the 8.0m&-#; 8486; -135.0mΩ . The tolerance of standard inductance is ± 20%.

IHLP‑ 2525CZ‑ 11 inductors can be dealt with high transient current peak value in case of hard saturation, and can run with the frequency of 1MHz. These new devices adopt to accord with RoHS standard and have unleaded combined structure of 100 of the protective cover to capsulate, it is extremely low-level that this encapsulated structure can drop the buzz noise to, the operating temperature rage specification of the new device is ‑ 55 degrees of C- +125 degrees of C, and resist thermal shock, dampproof characteristic against mechanical shock and anti-vibration.

At present, the samples and batch productino batch of these two new inductors have already been offered. Its lead time of batch productino is 8- 10 weeks.

[nicasro-blog]

NS introduce it suitable for high the intersection of electric current and systems to be adjustable to step down the intersection of voltage regulation and control device

National semi-conductive company of U.S.A. (NS) Claim, introduce, step down the intersection of voltage regulation and control device synchronously at a high speed by one double-channel the intersection of voltage and mode. The advantage of this chip is that the switching frequency can be adjustable in the frequency domain of 500kHz in 200kHz, so is the ideal voltage regulation control device solution of the high-current system. LM2657 can drive the end N passway field effect crystal tube of level (FET) . In addition, the input voltage feedforward function of this chip helps to improve the input transient response. In the light load, users can choose efficiently and jump the cycle pressure impulse width of mode or fixed frequency to modulate (PWM) Mode. Because this chip can measure the pressure drop of the low-end field effect transistor, so support not to need the lossless overcurrent protection function of externally positioned sense resistor. In addition, because this chip adopts unique adaptation duty ratio clamping technology, so even can still lower the crest current by a wide margin in the extremely abnormal condition of loading. Two this chips are programmable independently to export and transferring and become too 180 degrees are exported out-of-phase (interlock and switch over) ,So under many circumstances only need to set very small input capacitor and electric-wave filter additionally. The input voltage range of this chip is lain between 4.5 Bend over (V) To 28 volts, output voltage is very low to 0.6 volts. Products characteristic and advantage of LM2657 chip Adjustable switching frequency (from 200kHz to 500kHz) Input the voltage range: 4.5 Bend over and come 28 volts The synchronous double channel is mixed with the work Force pulse length modulation or jump the cycle mode The lossless low-end field effect transistor electric current measures the function Duty ratio clamping of the adaptation High-current power-handling capability It is extremely low to shut down in the electric current of modal power supply Consult the voltage accuracy and does not exceed ± 1.5% The output voltage can be low to come 0.6 Bend over Normal mark and chip can enable the function to supply power Under Voltage Lock Out function Overvoltage / low-voltage protection function Soft turn on Power management products of the national semiconductor of U.S.A. Reveal according to the stabilizator / reference circuit market research of the voltage that iSuppli was carried on in 2004, the national semiconductor of U.S.A. is a power management integrated circuit supplier of the first largest in the world, the market share reaches 12.8% high. In the fiscal year in 2003, the power management products business volume of the national semiconductor of U.S.A. rose by 29.7% compared with the previous year, it is far 17.3% higher than industry promotes one on average. U.S.A. national semiconductor has innovative power management products of all kinds, include leading integrated circuit such as linear voltage regulator, power controlling, controlling and Voltage Reference of the same trade or business and various switch converters, for example the high voltage direct current / direct current changes integrated circuit, capacity commutator of the switch, light source and manages integrated circuit and inductance type switch converter. WEBENCH of the national semiconductor of U.S.A. is the online design tool specially for system design engineer, let engineers choose the power management products on the net, then conceive and analyze system design on the net, reuse for one's own preference kit, carry on modeling, and relevant kit it guarantees to be can in send customer to in the hand in the short time very much even more. Materials substantially as wanting to further inquire about about the national semi-conductive power management products in U.S.A., can browse through http://power.national.com/CHS webpage. Price and supplying the situation LM2657 chip adopts TSSOP-28 to capsulate, purchases and regards 1,000 as the unit, sells at 2.75 dollars, has supplied from stock in a large amount already each one. www.national.com/CHS