RC4194K 데이터 시트보기 (PDF) - Fairchild Semiconductor

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RC4194K

Dual Tracking Voltage Regulators

Fairchild Semiconductor 

PRODUCT SPECIFICATION

In the above example, let’s say that the user’s load current is

200 mA and he wants to calculate the combined qC-S and

qS-A he needs:

Given: IO = 200 mA,

qJ – A = -(--V----I--N-----–-----V----O----U--T--T--J-)--–-´---T--I--AO-----+-----V-----I--N-----´----I---Q--

= 1---0----V------´----2---0---0-5---m0----°-A-C-----+-–---4-1--0-2---5-´--°---3C---.-2---5-----´----1---0----–--3-

= 11.75°C/W

RC4194

Given qJ-C = 7.15°C/W for the 4194 in the K package,

qC-S + qS-A = 11.75°C/W – 7.15°C/W

= 4.6°C/W

When using heatsink compound with a metal-to-metal

interface, a typical qC-S = 0.5°C/W for the K package.

The remaining qS-A of approximately 4°C/W is a large

enough thermal resistance to be easily provided by a number

of heatsinks currently available. Table 1 is a brief selection

guide to heatsink manufacturers.

Table 1. Commercial Heatsink Selection Guide

No attempt has been made to provide a complete list of all heatsink manufacturers. This list is only representative.

qS-A1(°C/W)

0.31 – 1.0

1.0 – 3.0

3.0 – 5.0

5.0 – 7.0

7.0 – 10.0

10.0 – 25.0

20

30

32

34

45

60

Manufacturer/Series or Part Number

TO-66 Package

Thermalloy — 6441, 6443, 6450, 6470, 6560, 6590, 6660, 6690

Wakefield — 641

Thermalloy — 6123, 6135, 6169, 6306, 6401, 6403, 6421, 6423, 6427, 6442, 6463, 6500

Wakefield — 621, 623

Thermalloy — 6606, 6129, 6141, 6303

IERC — HP

Staver — V3-3-2

Wakefield — 690

Thermalloy — 6002, 6003, 6004, 6005, 6052, 6053, 6054, 6176, 6301

IERC — LB

Staver— V3-5-2

Wakefield — 672

Thermalloy — 6001, 6016, 6051, 6105, 6601

IERC — LA, uP

Staver — V1-3, V1-5, V3-3, V3-5, V3-7

Thermalloy — 6-13, 6014, 6015, 6103, 6104, 6105, 6117

Dual In-line Package

Thermalloy — 6007

Thermalloy — 6010

Thermalloy — 6011

Thermalloy — 6012

IERC — LI

Wakefield — 650, 651

Staver Co., Inc.: 41-51 N Saxon Ave., Bay Shore, NY 11706

IERC: 135 W Magnolia Blvd., Burbank, CA 91502

Thermalloy: P.O. Box 34829, 2021 W Valley View Ln., Dallas, TX

Wakefield Engin Ind: Wakefield, MA 01880

* All values are typical as given by manufacturer or as determined from characteristic curves supplied by manufacturer.

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