參數(shù)資料
型號(hào): L6221AS
廠商: 意法半導(dǎo)體
英文描述: QUAD DARLINGTON SWITCH
中文描述: 四達(dá)林頓開關(guān)
文件頁數(shù): 11/15頁
文件大?。?/td> 1083K
代理商: L6221AS
Figure 25 :
Maximum Dissipable Power and Junc-
tion to Ambient Thermal Resistance
versus Side "
α
"
Figure 26 :
Maximum Allowable Power Dissipa-
tion versus Ambient Temperature
Figure 24 :
External Heatsink Mounting Example
Figure 23 :
Example of P.C. Board Copper Area
Which is Used as Heatsink
MOUNTING INSTRUCTION
The R
th j-amb
of the L6221AS can be reduced by sol-
dering the GND pins to a suitable copper area of the
printed circuit board (Fig. 23) or to an external
heatsink (Fig. 24).
The diagram of figure 25 shows the maximum dis-
sipable power P
tot
and the R
th j-amb
as a function of
the side "
α
" of two equal square copper areas hav-
ing a thickness of 35
μ
(1.4 mils). During soldering
the pins temperature must not exceed 260
°
C and
the soldering time must not be longer than 12 sec-
onds.
The external heatsink or printed circuit copper area
must be connected to electrical ground.
L6221AS - L6221AD - L6221N
11/15
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