read barcode scanner in c#.net PRINTED CIRCUITS HANDBOOK in Software

Maker QR Code JIS X 0510 in Software PRINTED CIRCUITS HANDBOOK

PRINTED CIRCUITS HANDBOOK
Decode QR Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code JIS X 0510 Printer In None
Using Barcode maker for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
The second step is to determine the size of a copper plane in the board and the distance from the trace to the plane. For example, start with a 1 oz. solid copper ground plane in a 127 mm (5 in.) long and 203.2 mm (8 in.) wide board 258.1 mm (40 in.2). Assume that the trace is several dielectric layers from the ground plane. If the distance from the trace to the plane is 0.02 in., then Fig. 16.10 can be used to find the coefficient to be used with the baseline trace temperature rise. The size of the copper plane, 40 sq. in., is selected on the x-axis of Fig. 16.10. The distance from trace to the plane, 0.02 in., is the second curve from the top in Fig. 16.10. The coefficient is found on the y-axis directly across from the intersection of the curve and copper plane area. The trace temperature rise will be approximately 0.42 times the temperature rise calculated from Fig. 16.5 or Fig. 16.6. If the trace were located 0.127 mm (0.005 in.) from a 2 oz. copper plane, the third curve from the top in Fig. 16.10, the temperature rise would be 0.29 times the temperature rise. So, if a 10 C rise were calculated from the baseline chart, the temperature rise would be 4.2 C in the first example and 2.9 C in the second example.
Decode QR Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Encoding QR In Visual C#
Using Barcode maker for Visual Studio .NET Control to generate, create Denso QR Bar Code image in .NET applications.
Parallel Conductors Parallel conductors refer to traces that are parallel to each other as shown in Fig. 16.11. Parallel conductors also refer to traces on adjacent layers that are parallel to each other. The design rule for sizing parallel traces from the design guidelines is stated in this section. For groups of similar parallel conductors, if they are closely spaced (that is, as much as 25.4 mm [1.0 in.] spacing and less when using a baseline chart), the temperature rise may be found by using an equivalent cross-section and an equivalent current. The equivalent cross-section is equal to the sum of the cross-sections of the parallel conductors, and the equivalent current is the sum of the currents in the conductors. Example: Determine the maximum current that can be applied to 16 parallel traces that are 0.028 mm (0.0011 in.) wide 1 /4 oz. copper (0.00035 in. thick):
Draw QR Code ISO/IEC18004 In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
Painting Quick Response Code In Visual Studio .NET
Using Barcode creation for .NET framework Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
Cross-sectional area of one trace = 0.00035 in. 0.0011 in. = 3.85E-07 in.2 = 0.385 sq. mil. Cross-sectional area of 16 traces = 3.85 E-07 in.2 16 = 6.2 sq.mil. Find the current for the total cross-sectional area, 6.2 sq. mil., 1.1/1.1 l/s, 1/4oz and a 10 C rise, using Fig. 16.6 results in 0.7 amps. FIGURE 16.11 Parallel traces. (Photograph used Divide the current by 16 traces, 0.7/16 = 0.0438 amps. by permission from Richard Snogren.) Round down = 0.04 amps per trace. For boards that are less than 0.07 in. thick, the temperature rise will be higher. If copper planes are present in the board, then the temperature rise will be lower. Trace data for 1/ oz. copper is not available, so there are assumptions regarding the tem4 perature rise. It is assumed that 1/4 oz. copper will exhibit a similar temperature rise for a defined cross-sectional area as 1 oz. copper.
QR Creator In Visual Basic .NET
Using Barcode drawer for VS .NET Control to generate, create QR Code 2d barcode image in VS .NET applications.
Drawing Data Matrix In None
Using Barcode creator for Software Control to generate, create Data Matrix ECC200 image in Software applications.
Closely related to parallel conductors are coils. For applications where etched coils are to be used, the maximum temperature rises may be obtained by using an equivalent cross-section equal to 2n times the cross-section of the conductor, and an equivalent current equal to 2n times the current in the coil, where n is equal to the number of turns. 2
UPC - 13 Creation In None
Using Barcode maker for Software Control to generate, create EAN13 image in Software applications.
Code 39 Extended Creator In None
Using Barcode printer for Software Control to generate, create Code 39 Extended image in Software applications.
CURRENT CARRYING CAPACITY IN PRINTED CIRCUITS
USS-128 Encoder In None
Using Barcode creation for Software Control to generate, create EAN / UCC - 13 image in Software applications.
GTIN - 12 Creation In None
Using Barcode printer for Software Control to generate, create UPC Code image in Software applications.
Example: Determine the maximum current for a coil with 10 turns and the same size trace as the previous example:
Printing Leitcode In None
Using Barcode maker for Software Control to generate, create Leitcode image in Software applications.
Matrix Barcode Encoder In VB.NET
Using Barcode generator for VS .NET Control to generate, create Matrix 2D Barcode image in VS .NET applications.
Trace cross-sectional area = 0.385 sq. mil. or 3.85E-07 sq. in. The number of turns, n, is = 10. 2 n cross-sectional area = 2 10 0.385 sq. mil. = 7.7 sq. mil. Equivalent current = 2 n current = 0.8 amp. Coil current for a 10 C rise = 0.8 amp/2n = 0.04 amp.
Code 39 Full ASCII Encoder In Objective-C
Using Barcode maker for iPhone Control to generate, create ANSI/AIM Code 39 image in iPhone applications.
Bar Code Scanner In VS .NET
Using Barcode Control SDK for ASP.NET Control to generate, create, read, scan barcode image in ASP.NET applications.
Board Thickness The board thickness is a part of defining a baseline for creating a trace-sizing chart and has a direct impact on conductor heating. The thickness of the board affects the heat transfer path, causing energy to flow away from the trace. As the board thickness increases, the heat transfer path away from the trace increases. When the heat transfer path is increased, the thermal resistance is lower and the temperature rise is lower. The dielectric material is the first material that begins to transfer heat from the trace. The board material although poor in terms of thermal conductivity is better than just air itself. Figure 12 illustrates the impact of board thickness on trace temperature rise. Each category represents the same trace and current level.The x-axis represents the board thickness in in. A 9 percent increase is seen in the trace temperature rise, going from a 0.07 in. thick to 0.059 in. thick board. A 43 percent increase is seen in the trace temperature rise, going from 0.07 in. thick to 0.038 in. thick. And a 260 percent increase is seen in the trace temperature rise going from 0.07 in. thick to a trace in free air. The free air case is equivalent to the IPC internal conductor-sizing chart.
Encoding EAN13 In Java
Using Barcode creator for BIRT reports Control to generate, create EAN 13 image in BIRT reports applications.
Read Bar Code In Visual C#
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Scanning Code39 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
DataMatrix Maker In None
Using Barcode printer for Online Control to generate, create Data Matrix image in Online applications.
Copyright © OnBarcode.com . All rights reserved.