CRT0402 [BOURNS]

Selecting the Right Resistor for Your Application; 选择合适的电阻器为您的应用


型号：	CRT0402
厂家：	BOURNS ELECTRONIC SOLUTIONS
描述：	Selecting the Right Resistor for Your Application 选择合适的电阻器为您的应用电阻器
文件：	总6页 (文件大小：351K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Bourns® Resistive Products

Selecting the Right Resistor for Your Application

Introduction

Science and engineering students typically experiment with axial leaded resistors,

learning a color code to identify the resistor value based on the stripes around the resistor

body. In practice, however, axial leaded resistors are overshadowed in board fabrication

CR Series

by resistors for which the construction, package styles, and materials are targeted for

speciﬁc applications.

Bourns oﬀers a wide variety of resistive products that include devices that range from

industry standard size chip resistors to very high frequency (RF) power resistors in order

CRT/CRL Series

to meet today’s broad market requirements. ere are many advantages to incorporating

Bourns® resistors into today’s designs including custom values, miniature component

size, higher power ratings, and the highest quality materials and construction. Since it

is far more than just the resistor value that drives the decision of which resistor to use

in a circuit design, Bourns is committed to ensuring designers’ needs are met with the

CAT/CAY Series

company’s extensive portfolio of resistive products. In this white paper, the various types

of resistors will be brieﬂy explained, and tables are provided as a quick reference for the

available range of resistive products.

4816P

CHF9838CNF Series

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Bourns^®Resistive Products

Selecting the Right Resistor for Your Application

Overview of Resistor Families

Regardless of the application, a resistor is essentially a current control, voltage drop product.

Additionally, Bourns® components can be designed to withstand unique application challenges like an

overcurrent pulse for a short duration without signiﬁcant changes of resistor characteristics. Bourns®

Fixed Resistors can be deﬁned by construction type (thick ﬁlm, wirewound, etc.), the way they are

processed, (through-hole, surface mount, etc.) the intended use (current sense, high frequency, etc.),

accuracy, size, power or many other ways. Each resistor does two main things: control current and

control a drop in voltage.

CR Series

CRT/CRL Series

Bourns also has a very broad oﬀering of resistor network (Model 4xxx Series), in a wide selection of

industry standard models. erefore, they can be used with an industry standard footprint for seamless

placement in printed circuit board designs.

Bourns® chip resistors are available in various package sizes, standard values and technologies

which are designed to meet most market requirements including those for speciﬁc application and

performance characteristics.

CAT/CAY Series

Bourns® CRL series resistors oﬀer total resistance values less than those required by industry standards

providing engineers enhanced circuit design ﬂexibility.

When more precision is desired, Bourns® CRT series provides tight tolerance and high precision over

a wide range of resistance values. ese resistors are typically used in current sense applications and

precision circuits, with speciﬁc ordering characteristics for size and performance selection.

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Table 1

CRT Series Chip Resistors

TCR

Options

(PPM/°C)

Max.

Power

Max.

Overload

Absolute

Tolerance

CHF9838CNF Series

Model

TR Range

Voltage

CRT0402

CRT0603

CRT0805

CRT1206

0.063 W

0.1 W

25 V

50 V

100 V

200 V

300 V

10 Ω - 205 kΩ

10 Ω - 1 M

2 Ω - 2 M

5, 10, 15, 20, 25

0.01 % - 1 %

0.125 W

.25 W

100 V

150 V

1Ω - 2.5 M

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Bourns^®Resistive Products

Selecting the Right Resistor for Your Application

Overview of Resistor Families (Continued)

Bourns® resistor networks and chip resistor arrays are available to meet a variety of needs, and the

ﬁgures below illustrate possible conﬁgurations inside Bourns® resistor networks. CAT/CAY resistor

arrays are oﬀered in isolated and various bussed conﬁgurations.

CR Series

CRT/CRL Series

Isolated

Bussed

Dual Terminator

CAT/CAY Series

4816P

Figure 1

Available Fixed Resistor conﬁgurations

Bourns oﬀers general purpose resistors with uniform value as well as dual termination

resistors, intended for specialized applications such as gigabit communication networks.

Designs that feature ﬁeld programmable gate arrays (FPGAs) harness the miniaturized

circuitry and superior quality of the high performance Bourns® CAT16 series for low voltage

diﬀerential signal (LVDS) interfaces.

CHF9838CNF Series

Table 2

Chip Resistors

Model

Package

Description

Standard Chip

Resistor

TCR

200

Tolerance

1 %, 5 %

5 %

Resistance

1 - 10 MΩ

0201 - 2512

0603 - 2512

2506

CRL

Current Sense Resistor

200 - 600

200

0.01 - 9 Ω

CAT16PC4F12,

CAT16LV4F12

LVDS Termination

(Xilinx FPGA)

Special Values

(Check Website)

CAY/CAT

0804/1206/1608

0402 - 1206

Resistor Array

200

1 %, 5 %

0.01 % - 1 %

10 - 1 MΩ

Thin Film Chip

Resistor

CRT

5 - 50

1 Ω - 2.5 M

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Bourns^®Resistive Products

Selecting the Right Resistor for Your Application

Overview of Resistor Families (Continued)

Bourns® pulse resistors and current sense resistors are highly specialized for applications such

as motor drives and industrial equipment. e resistor typically has a very small value and

provides a measure of current in critical areas of the circuit. Bourns® pulse resistors are capable of

withstanding surges without a material change in the characteristics of the resistor.

CR Series

Bourns oﬀers the CRA, CRF, CRM and PWR pulse and current sense resistors in typical package

styles such as through-hole, bent metal and TO-220 conﬁgurations. DPAK and D²PAK are available

as well.

CRT/CRL Series

Bourns® CHF series are high frequency RF power resistors. Specialized for RF applications

and high frequency signals, they are commonly used in GSM, UMTS, and WiMax interfaces

with standard circuits such as isolators, combiners, and duplexers and in television and radio

applications in combiner and divider interfaces. ese parts are available in the 9 GHz range with

power ratings up to 1 kW. e Bourns® CHF series is set apart from other high frequency resistors

by its material and construction. High quality copper and solid construction provide superior

characteristics. Bourns® CHF resistors are constructed with a thick ﬁlm process. Bourns has

decades of successful experience with this process, and a customized resistor can be created if a

speciﬁc requirement is not met by a standard part.

CAT/CAY Series

4816P

CHF9838CNF Series

1/11 • e/N1064

Bourns^®Resistive Products

Selecting the Right Resistor for Your Application

Overview of Resistor Families (Continued)

Bourns® CHF resistors are provided in a standard surface mount package. ese parts can

be either electrically insulated or terminated. Generally, there is one exposed lead while the

other lead is tied to the ground plane or to a heat sink. e substrates used in the surface

mount Bourns® CHF resistors are Aluminum Nitride and Beryllium Oxide. Higher power

parts with ﬂanged packages have substrates of Beryllium Oxide, Alumina, and Aluminum

Nitride. While the substrates help to dissipate heat, operation at higher power levels may

require a heat sink to handle the dissipation. In some designs, the CHF series is bolted to the

heat sink, printed circuit board, or ground plane. e power ratings of Bourns® CHF resistors

make it possible to absorb very high pulses in high power situations.

CR Series

CRT/CRL Series

Table 3

High Frequency Resistors

Frequency

Power (W)

Resistor Values

(Ohms)

Model

VSWR

Substrate

CAT/CAY Series

(GHz)

CHF2010CNP

CHF1206CNT

CHF2525CNT

CHF3725CNP

CHF3523CNT

CHF3020CBF

CHF5225xxF

CHF8838CNF

CHF9838CxF

CHF12545CBF

CHR190104CBF

CHF190104KBF

1.2

1.25

1.2

ALN

50, 100 +/- 5 %

50 +/- 5 %

ALN

50 +/- 5 %

ALN

50 +/- 5 %

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150

1.1

ALN

50 +/- 5 %

1.35

1.2

BEO

50, 100, 200 +/- 5 %

50, 100 +/- 5 %

50 +/- 5 %

60/30/20

150

250

500

800

1000

ALN, AL203, BEO

ALN

1.2

ALN, BEO

BEO

CHF9838CNF Series

1.1

50, 100 +/- 5 %

12.5, 25, 50, 100 +/- 5 %

50 +/- 5 %

1.2

BEO

1.2

BEO

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Bourns^®Resistive Products

Selecting the Right Resistor for Your Application

Beneﬁts of Working with Bourns

Bourns oﬀers standard resistors for vast applications needs, and when one is not available it

is likely that it can be created by customizing an existing, proven part. Bourns has lead in the

development and innovation of resistive products for decades and continues to expand its

product oﬀerings based on the needs of designers and on emerging market applications. As

an example, certain applications including consumer goods require a resistor that is fuseable.

is fuseable resistor will become an open circuit during a surge to prevent the electronics

from catching ﬁre. is is just one example of Bourns being ready to meet evolving

requirements with a high quality solution. Designers’ concerns about size, power and quality

of the component have been addressed when they select a resistor from Bourns.

CR Series

CRT/CRL Series

CAT/CAY Series

4816P

CHF9838CNF Series

For further technical support and for more information on Bourns® Resistive Products,

w^plew^asew^vi.^sib^tourns.com

“Bourns”is a registered trademark of Bourns, Inc. in the U.S. and other countries.

Americas: Tel +1-951 781-5500

Fax +1-951 781-5700

EMEA: Tel +41-(0)41 768 55 55 Asia-Paciﬁc: Tel +886-2 256 241 17

Fax +41-(0)41 768 55 10 Fax +886-2 256 241 16

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CRT0402 [BOURNS]

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