參數(shù)資料
型號(hào): L6245
廠商: 意法半導(dǎo)體
英文描述: 5V HARD DISK DRIVE POWER COMBO
中文描述: 5V的硬盤驅(qū)動(dòng)器電源組合
文件頁(yè)數(shù): 13/15頁(yè)
文件大?。?/td> 191K
代理商: L6245
THERMAL CHARACTERISTICS
On the application, the L6245 must be soldered
on a PCB system. The Traks Area, dependingon
the lenght and the width of each track, must be
between 2 to 10 square mm. An area of 10 mm
2
can give a typ. Thermal Resistance Junction-to-
Ambient value of 85
°
C/W (See Fig. 2): this value
refer3 to a Total PowerDissipated Powerof 1W.
Fig. 9 shows the increase of the Rth j-amb when
the Dissipated Power decreases.
Practically, very useful information is the change
of the thermal resistance (Thermal Impedance)
versus a single pulse of power width or versusthe
time the dissipationbegins.
Fig.4 showsthis Thermal Impedancetrend.
Figure2:
TypicalR
th j-amb
vs. TracksArea on PCB
Figure 3:
TypicalJunction-to-Ambient Thermal
Resistance vs. Total Dissipated
Power. (L6245 mounted on a typical
PCB)
Figure4:
Typical Transient Thermal Impedance
vs. Time or Pulse Width.(L6245
mountedon a typical PCB)
L6245
13/15
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