Datasheets

EG G Heimann Optoelectronics GmbH, Wiesbaden, Germany Radiation Image Detector RIS 256 - Datasheet... 

General Storage Safeguards, Loss Prevention Datasheet 8-0, Factory Mutual Engineering Corp. 

POWER RECOVERY EXPANDER DATASHEET CUSTOMARY UNITS... 

Today, there are two ways to approaeh the design of switehing power supplies. The design of board-level, de/de (de-in, de-out) switehing power supplies ean be eopied direetly from the semieonduetor maker s datasheet and ean use standard eomponents from other manufaeturers. However, if any of the requirements fall outside the standardized approaehes, then it beeomes a eustom design, and is mueh more eomplex. 

These capacitances are specified in each power MOSFET datasheet and are very important. Cg s, or drain-to-source capacitance, is considered in the drain loads, but does not directly enter into the drive design. The Ci s and C ss have direct and calculable effects upon the switching performance of the MOSFET. Figure 3-36 shows the gate and drain waveforms of a typical N-channel MOSFET switching cycle. 

From the datasheet, one sets the frequeney by the following equation. 

There are eommon parasitie elements that exists in all switehing power supplies. Their influenee is typieally notieed when one views the waveforms at the major ae nodes within the eonverter. Some are even eharaeterized within the datasheets of the physieal eomponents, sueh as the intrinsie eapeitanees of a MOSFET. Some of the major parasitie elements for two types of eommon eon-vert ers ean be seen in Figure 4—3. 

The IC produces an asymmetrical deadtime delay. From the graph in the datasheet a value of lOOkohms will produce a pass unit turn-on delay of about llOnS and a turn-off delay of 180 nS. 

HSG 193 Datasheets COSHH essentials - easy steps to control chemicals... 

L 62 Safety datasheets for substances and preparations dangerous for supply... 

Technieal Datasheet, MINAC System, Schonberg Radiation Corporation, Santa Clara, CA 95054. 

The best compilation of standardized specifications is presented in the API Specification For Mechanical-Drive Steam Turbines For General Refinery Services Its suggested standard datasheet is given in Figure 14-25. 

Figure 14-25. Standard datasheet for steam turbines (and gears). (Used by permission API Standard 615, Mechanical Drive Steam Turiiines for General Refinery Service, 1= Ed., Appendix 1, 1958. American Petroleum Institute.)...

Electronic product catalog Electronic Product Catalog is a sales tool available to material producers and distributors. Potential customers looking for materials can be directed to a website through direct links from datasheets accessed by customers on Prospector Web. 

Datasheets Provides password access to GE Plastics product data. 

Product Locator A product-specific search engine which provides datasheets/MSDS sheets. 

L 62 Safety datasheets for snbstances and preparations dangerons for snpply... 

CleanGredients is an online database of cleaning product ingredients A one-stop-shop for green formulation . The database contains physical chemical data, MSDSs, technical datasheets, and environmental and human health hazard data on raw materials used to formulate cleaning products. 

Boyle-Midway — Old English Lemon Cream Furniture Polish, 1865, Material Safety Datasheet. http //www.biosci.ohio-state.edu/ jsmith/MSDS/OLD%20ENGLISH%20 LEMON%20CREAM%20FURNITURE%20POLISH.htm... 

In DC-DC converters, we can somewhat slow the turn-on of Fets if we insert a small resistor (10 to 20Q. typically) in series with the decoupling capacitor of their respective driver stages. For example, a small resistor can be placed in series with the bootstrap capacitor of the third-generation switcher family I used to cover. That helped with almost 10 to 20% of customers, but somehow this trick didn t find its way into the applications information section of their datasheet. If the Fets are external, we can try a small resistor in series with the Gate, but this affects both the turn-on and turnoff (with such low threshold voltages, a diode in parallel to the resistor will not do anything). 

The datasheet usually provides certain temperature multipliers for the allowable ripple current. For example, for the old but still well-known LXF series from Chemicon, the numbers provided are... 

So what are the temperature multipliers really telling us All they really tell us is how the vendor has designed his capacitor from a thermal point of view, or what exactly is the capacitor s core temperature. As we will see, if we stick to the RMS current rating of the capacitor (without applying temperature multipliers), we don t really need to know the details of the core temperature either. Temperature multipliers were therefore just objects of abuse by some designers in the past. This is perhaps why nowadays most elko datasheets are no longer even carrying that information. 

So the multiplier must be 5°5 = 2.236, which agrees with the published datasheet value. Therefore we see that from the vendor s published ripple current temperature multipliers, we can easily deduce his designed-in maximum core temperature. 

I derived this curve-fit equation from datasheets and data provided by Chemicon. For the cases included at least, I could confirm that the above equation was accurate to within 6% for all capacitor outer diameters in the range of 10mm to 76mm. And for diameters greater than 40mm, the error from the use of this formula was less than 1%. 

Note that Table 4-1 applies at OV DC. In general, vendors state the nominal capacitance in a datasheet as measured at an applied voltage of IVrms, at 1kHz and 25°C. But in an actual circuit we could see the following typical spreads (after 100k hours, and also considering the possibility of both AC and DC voltages) ... 

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