參數(shù)資料
型號(hào): RT9172F-25CT
廠(chǎng)商: Electronic Theatre Controls, Inc.
英文描述: Hex Inverter; Package: TSSOP-14; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2500
中文描述: 3A固定輸出電壓LDO穩(wěn)壓器
文件頁(yè)數(shù): 9/16頁(yè)
文件大?。?/td> 342K
代理商: RT9172F-25CT
Preliminary
RT9172
DS9172-03 April 2002
www.richtek-ic.com.tw
9
Heatsinking TO-220Packages
The thermal resistance of a TO-220 package can be
reduced by attaching it to a heat sink or a copper plane
on a PC board. If a copper plane is to be used, the
values of
θ
JA
will be same as shown in next section for
TO-263 package.
Heatsinking TO-263 and SOT-223 Packages
The TO-263 and SOT-223 packages use the copper
plane on the PCB as a heatsink. The tab of these
packages are soldered to the copper plane for heat
sinking. Fig.4 shows a curve for
θ
JA
of TO-263 package
for different copper area sizes, using a typical PCB with
1 ounce copper and no solder mask over the copper
area for heat sinking.
As shown in the figure, increasing the copper area
beyond
1
square
inch
improvement. The minimum value for
θ
JA
for the TO-
263 package mounted to a PCB is 32
°
C/W.
produces
very
little
θ
JA
vs. Copper (1 Ounce) Area for TO-263
T
R
J
A
Fig. 4
0
20
40
60
80
100
120
140
160
180
200
0
0.5
1
1.5
2
2.5
3
Copper Foil Area (SQ. IN.)
4W
2.5W
1W
相關(guān)PDF資料
PDF描述
RT9172F-25CT5 Hex Inverter; Package: SOEIAJ-14; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2000
RT9172F-26CG Hex Inverter; Package: SOEIAJ-14; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2000
RT9172F-26CM Quad XOR Gate; Package: PDIP-14; No of Pins: 14; Container: Rail; Qty per Container: 500
RT9172F-26CM5 Quad XOR Gate; Package: PDIP-14; No of Pins: 14; Container: Rail; Qty per Container: 500
RT9172F-26CT Quad XOR Gate; Package: SOIC 14 LEAD; No of Pins: 14; Container: Rail; Qty per Container: 55
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