參數(shù)資料
型號(hào)： ISL59920IRZ-T7
廠商： Intersil
文件頁(yè)數(shù)： 7/16頁(yè)
文件大?。?/td> 0K
描述： IC ANLG VID LINE TRPL 20-QFN
標(biāo)準(zhǔn)包裝： 1,000
類型： 視頻延遲線
應(yīng)用： RGB 視頻信號(hào)
安裝類型： 表面貼裝
封裝/外殼： 20-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-QFN 裸露焊盤（5x5）
包裝： 帶卷 (TR)
15
FN6826.2
August 31, 2010
Power Dissipation
As the delay setting increases, additional filter blocks turn on
and insert into the signal path. When the delay per channel
increments, VSP current increases by 0.9mA while VSM
does not change significantly. Under the extreme settings,
the positive supply current reaches 141mA and the negative
supply current can be 41mA. Operating at ±5V power supply,
the worst-case ISL5992x power dissipation is:
The minimum
θ
JA required for long term reliable operation of
the ISL5992x is calculated using Equation 2:
Where:
TJ is the maximum junction temperature (+135°C)
TA is the maximum ambient temperature (+85°C)
For a 20 Ld package on a well laid-out PCB with good
connectivity between the QFN’s pad and the PCB copper
area, 31°C/W
θ
JA thermal resistance can be achieved. This
yields a much higher power dissipation of 3.54W using
Equation 2 (see Figure 31). To disperse the heat, the bottom
heat spreader must be soldered to the PCB. Heat flows
through the heat spreader to the circuit board copper then
spreads and convects to air. Thus, the PCB copper plane
becomes the heatsink (see TB389). This has proven to be a
very effective technique. A separate application note, which
details the 20 Ld QFN PCB design considerations, is
available.
PD
5
141mA
5
41mA
910mW
=
+
=
(EQ. 1)
θ
JA
T
J
(
T
A ) PD
55
°
=
CW
–
=
(EQ. 2)
ISL59920, ISL59921, ISL59922, ISL59923
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ISL59921 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple Analog Video Delay Lines
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ISL59921IRZ-T7 功能描述:視頻 IC ISL95810W SINGLE 256 TAP I2C 10KOHM XDCP RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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