#the converter

[coffins-4sale]

ooo ooo. old art from march....oooooo..... forget about my last post....oooooo wiggles my fingers hypnotically

(The converter au is by @bloomblanche..... follow her she's cool)

[birdsintheory]

Each laptop charger comes with a FREE hand warmer! That’s right FREE!

[ashwor-blog]

Catalyst releases the new low-noise boost converter

Catalyst semi-conductive company claims to expand its products of LED driver family, introduces CAT4238 high-pressure boost converter. CAT4238 can drive 10 more than LED, have low-noise high-frequency switching characteristic, and function integration inclusive soft turn on and overvoltage protection, can reduce the use of the external component. And this noise of lowering designer of application in a poor light of the jumbo size LCD faceplate in help effectively saves the space of circuit board.

CAT4238 uses the switch framework (1MHz) of fixed frequency ,It is the low noise that is chosen applied and ideally. In addition, the high-pressure CMOS output final-stage in the device, the low voltage power supply in the usable input end is to one long bunch of LED (the total magnitude of voltage is up to 38V)s Offer the voltage output commutated of high precision. Its conversion efficiency is still level very up to 87%.

In order to dispel the excessive surging (in-rush) that may be produced at the time of power up Electric current, CAT4238 offers integral soft start-up control. Once the spoiled situation that LED opens a way, internal overvoltage protective circuit will set the device as the work pattern of low power consumption, will output the voltage limiting at the safe level, will not need any peripheral component. These above-mentioned characteristics have already totally been inclusive integration, do not need to increase external component and relevant cost, and can save the area of the circuit board.

The boost that CAT4238 has expanded Catalyst changes LED driver family, the like product released previously has CAT4137 and CAT4237 devices, but the design to driving 5 LEDs and 8 LEDs separately.

CAT4238 product performance can drive 10 LED lamps (the magnitude of voltage reach 38V) It reaches 87% of the static earth current extremely low to drive the high-pressure LED electric efficiency of row of first sharp, only 0.6mA adjustable output current fixed frequency (1MHz) Low noise operate and bring restriction surging (in-rush) Is the soft turn on function shut-down electric current of the electric current smaller than 1? Overvoltage protection (Over Voltage Protection, OVP) when ALED opens a way Know the automatic shutdown (UVLO) when the voltage is lower than 1.9V It is capsulated (maximum height is 1mm) that SOT23 of 5 overheat protective stitches of overloading is slim All meet RoHS green and capsulate the requirement

Price and green capsulate and supply CAT4238 Israel " Half a height " (low-profile, maximum height is 1mm) Pattern, 5 stitches SOT23 which accords with RoHS requirement are slim to capsulate the supply, the order coaxiality is CAT4238TD-GT3. 10,000 slices of prices is $0.78 U.S. dollars / each slice, sample wafer and Evaluation Board have already begun the supply now. 6- 8 weeks after the batch receives the order at time of delivery.

The details please visit: www.catsemi.com.

[jarenski-blog]

Vishay introduces the new nchannel MOSFET device of the lowest on resistance in the industry

A few days ago, Vishay Intertechnology, Inc. was announced, introduced the new nchannel MOSFET device with lowest on resistance in the industry --- SiR494DP, drop the voltage of the third generation TrenchFET power MOSFET of this series to 12V, the on resistance of this device and product of bar electric charge are the lowest in the device of this kind of nominal voltage at the same time.

The on resistance of maximum that SiR494DP of the nominal voltage 12V is driven by 10V and 4.5V grid is 1.2mΩ and 1.7mΩ respectively. The product of on resistance and bar electric charge is to appraise the key Q factor (FOM) used for MOSFET in DC-DC converter is employed ,The bar electric charge under 4.5V voltage of this device has 85nC only.

With competing for the device to compare to that low conducting loss and what the low switching loss has been optimized are proximal, these indexes indicate the on resistance of this device under 10V and 4.5V has been reduced by 40% and 35% respectively, FOM has been reduced by 29%. Lower on resistance and bar electric charge mean lower conducting and switching loss.

Vishay Siliconix SiR494DP can be used for adopting the low input voltage (5V- 3.3V) Step down converter, low output voltage (5V, 3.3V, and low) synchronously OR-ing application, and various adopt 5V and 3.3V input voltage to support some (POL) The intersection of low tension side and MOSFET in the system of converter, in application the, new low the intersection of feed-through and loss and low switching loss of device can use energy efficient.

As to the application of the low output voltage, the nominal voltage of bar source of 12V happens to be enough, but up until now, the design engineer is forced to choose the device of 20V, when especially the artificer needs the source voltage of bar of lowest on resistance and 20V at the same time. SiR494DP is first MOSFET with these characteristics: VDS =12V, VGS =± 20V, the on resistance driven by 10V grid has 1.2mΩ only.

The new power MOSFET adopts PowerPAK SO-8 to capsulate. This fund is unleaded, does not have halogenic device to accord with the demands for IEC 61249-2-21, accord with RoHS Directive 2002/96 / EC norm, and 100% have passed Rg and UIS test.

[jarenski-blog]

Fly and promise the semiconductor and introduce new peak efficiency solution the most specially for portable products

A few days ago, flying promises the semi-conductive company (Fairchild Semiconductor) Have attended two important trade seminars held in Chinese Taipei: " mini pen electric power designer trends are discussed " And " DTF is green Yes industry and power-saving technology forum " ,Explain the latest power-saving technology trend to other industry experts and professional personages of product development.

Fly and promise the semi-conductive marketing of market of the Asian-Pacific area and employ the executive vice president of the project to be blue and build copper and claim: " it is appropriate to the occasion to fly and promise the semiconductor and attend these seminars and just accord with, because American consumption electronic product association (Consumer Electronics Association, CEA) The nearest investigation shows, energy-conserving characteristic and its impact on environment of the electronic product have already aroused the attention from consumer, 53% of the persons interviewed claim they would like to pay the higher price and buy the ' green ' electronic product. "

It is built copper and added that blue: "Flying promises the semiconductor as the expert The Power Franchise of the power, is devoted to discussing the new development of improving efficiency technology with industry. The products designed and developed to promise the semiconductor fly to reduce the power consumption, lengthen the battery life-span, lengthen the duration of products, and but enhanced performance will not increase the electricity consumption, popularity is distinguished on the market. "

Sponsored by " new open 訊's component " magazine " Mini pen electric power designer trends are discussed " ,The newest challenge that this market faces to aim at canvassing fast-developing Net surfing, and offer the solution, the focal point is CPU power and power management product design, such as power management IC, intellectual PMU and AC/DC adapter,etc..

Fly to and promise marketing department higher level manager Lin QianYuan of semiconductor engineering and sum up the solution of realizing the compactness, surfing the Net high-efficiently a power adapter the seminar. Manager Lin's speech question is " How make with high capacity and efficiency / pen more electric power converter in small volume " ,Canvass three main fields, namely energy-conserving norm and design requirement for the external source; Non-loaded or the light load is made the power consumption minimizes and overall efficiency is promoted.

" DTF is green Yes industry and power-saving technology forum " Held by " electronic Times ", concentrate on canvassing the advanced technology in environment protecting mode used for IT trade.

It make by question at it is blue build on copper at forum as " The brand-new 3C high efficiency solution " Speech,last development trend of application, including PC SMPS, LLC and AsHB employs circuit, 90+ solutions, and use MOSFET technology in order to promote the advantage of efficiency. He has shared lighting and revealed present situation and relevant opinion of the market, and sum up and fly to promise the solution that the semiconductor faces the field of market of hot LED and LCD. Blue executive vice president has also grade system in all parts of the world that flying promises what various assistance electronic design engineers of semiconductor met and surmounted rigorously enforcing the requirement of the latest efficiency grade system in all parts of the world ted Solution.

Blue to build copper to conclude: "Flying and promising the semiconductor has favorable conditions, can offer the whole solution, tackle industry innovating and the government and consumer new challenge brought toward demand that the technology in environment protecting mode grows with each passing day. Can cooperate while flying and promising semiconductor, other semi-conductive suppliers and electronic manufacturers, make joint efforts, make to the daily electric equipment products environmental protection that uses, have more high efficiency. "

[jarenski-blog]

The electron puts out the high-reliability forward end pre- voltage regulation module with low noise in big Beijing of Xi'an

A few days ago, the electron put out the high-reliability forward end pre- voltage regulation module WKPG-50M with low noise in big Beijing of Xi'an. This product adopted SMT technology, and the heat conduction glue that cooperated with the characteristic to be excellent was encapsulated, have high, fine characteristic that power density is higher with low noise of reliability, mainly used in aviation, spaceflight, military electron,etc. field.

WKPG-50M forward end pre- voltage regulation module can widen the input voltage range of DC-DC converter, inhibit surging, Peak voltage effectively at the same time.

Three kinds of work patterns of WKPG-50M forward end pre- voltage regulation module:

The work pattern of voltage shortage: When the busbar voltage falls under 17V, the module of voltage regulation enters BOOST work pattern, output voltage 20V, when the input voltage falls under 10V, the module of voltage regulation shuts off all operation.

Normal work pattern: Look on as the busbar voltage in (17- 39) When at the VDC, within input voltage range in converter, voltage regulation module output, follow, input, change and lower than input voltage 0.6V.

The surging, overshoot inhibit the mode: When the busbar voltage is higher than 39V, pre- the intersection of voltage regulation and module in 38.5VDC about the intersection of output voltage and embedded, and can bear the maximum 80V/50ms surging of busbar voltage and lower 600V/20us overshoot of impedance of 50 ohms.

This module adopts the element pasted on surface to be assembled, and it is metal-cased to adopt and encapsulate capsulating.

[jarenski-blog]

Vishay releases two new microBucks to integrate and step down the stabilizator synchronously

A few days ago, Vishay Intertechnology, Inc. was announced, introduced two new series microBuck and integrated and stepped down the stabilizator synchronously --- SiC413, SiC417. SiC413 and SiC417 that the output current reaches 4A and 10A separately are DC-DC converter solutions, with grid driver of the self-carrying advanced the intersection of control device and IC, two nchannel MOSFET that optimize to PWM ' Low tension side) on high-tension side ,Bootstrapping diode in and step down independently the stabilizator is disposed.

The microBuck series products have merged Vishay and designed and capsulated experience and speciality on the design in design of discrete MOSFET, IC, offering to user has cost-effective, high-performance integrated solution. Integrated solutions produced have reduced the demand for the space of circuit board by a wide margin, this lets the artificer vacate more spaces used for important system function.

In these two devices released today, SiC413 has wide input voltage range of 4.75V- 26V, input of SiC417 the intersection of 3V- and 28V in voltage range, minimum output voltage part very low to 0.6V and 0.5V. The stabilizator has dispelled PCB and routed, thus has reduced EMI, the low tension side MOSFET on high-tension side of the device has low on resistance at the same time, can reduce the power consumption, and improve the characteristic.

The operation frequency of SiC413 is 500kHz, supports some power, the power system of 5V, 12V and 24V distributed system to compact DC-DC, processor and memorizer stabilizator in set-box, DVD player, LCD display unit, and the communication, network and commercial installation,etc. have been optimized. SiC413 adopts SO-8 of 5mmx 6mm to capsulate, can substitute and generally used in designing 4 in the middle to capsulate split-typely.

SiC417 adopts 32 pins MLPQ of 5mmx 5mm to capsulate, to the small and exquisite compactness, calculated battery-opwered and portably and offered required small physical dimension. Invariable to turn on the time controller to offer the remarkable transient response, can reduce the cost of the output filter under the circumstances that a given load regulate the goal. The device energy-conserving mode of supersonic wave has improved the efficiency under the light loading condition, surf the Net copy, tabletop and the intersection of server and computer, printer, DSL, set-box, HDTV, digital consumption product, network, and embedded applied a ideal one select in the long-range communicating device.

MicroBuck stabilizator can offer high power density and better thermal behavior under being fully loaded with the condition. Two devices have 93% high switching frequency with high efficiency, SiC417 can work together with various ceramic electric capacity, switching frequency is up to 1MHz. In addition, internal programmable LDO of SiC417 can provide 5V power for driving circuit of grid, or can lose LDO with the outside 5V power bypass, in order to realize optimal efficiency, drive the external nchannel MOSFET or other load.

In order to improve the reliability operated, simplify system integration, device these have the intersection of Cycle by Cycle and current limiter, can enable pin, internal soft turn on, under voltage locking, excess voltage protection, and carry on the function that heat shuts off at +150 ℃. SiC417 has offered power good signal, programmable electric current limiting, programmable LDO with 200mA power-handling capability.