Junction-to-ambient thermal resistance (θJA
參數(shù)資料
型號: A54SX72A-PQG208A
廠商: Microsemi SoC
文件頁數(shù): 35/108頁
文件大小: 0K
描述: IC FPGA SX-A 108K 208-PQFP
標準包裝: 24
系列: SX-A
LAB/CLB數(shù): 6036
輸入/輸出數(shù): 171
門數(shù): 108000
電源電壓: 2.25 V ~ 5.25 V
安裝類型: 表面貼裝
工作溫度: -40°C ~ 125°C
封裝/外殼: 208-BFQFP
供應商設(shè)備封裝: 208-PQFP(28x28)
SX-A Family FPGAs
2- 12
v5.3
Theta-JA
Junction-to-ambient thermal resistance (θJA) is determined under standard conditions specified by JESD-51 series but
has little relevance in actual performance of the product in real application. It should be employed with caution but is
useful for comparing the thermal performance of one package to another.
A sample calculation to estimate the absolute maximum power dissipation allowed (worst case) for a 329-pin PBGA
package at still air is as follows. i.e.:
EQ 2-11
The device's power consumption must be lower than the calculated maximum power dissipation by the package.
The power consumption of a device can be calculated using the Actel power calculator. If the power consumption is
higher than the device's maximum allowable power dissipation, then a heat sink can be attached on top of the case or
the airflow inside the system must be increased.
Theta-JC
Junction-to-case thermal resistance (θJC) measures the ability of a device to dissipate heat from the surface of the chip
to the top or bottom surface of the package. It is applicable for packages used with external heat sinks and only
applies to situations where all or nearly all of the heat is dissipated through the surface in consideration. If the power
consumption is higher than the calculated maximum power dissipation of the package, then a heat sink is required.
Calculation for Heat Sink
For example, in a design implemented in a FG484 package, the power consumption value using the power calculator is
3.00 W. The user-dependent data TJ and TA are given as follows:
From the datasheet:
EQ 2-12
The 2.22 W power is less than then required 3.00 W; therefore, the design requires a heat sink or the airflow where the
device is mounted should be increased. The design's junction-to-air thermal resistance requirement can be estimated
by:
EQ 2-13
θ
JA
= 17.1°C/W is taken from Table 2-12 on page 2-11
TA
= 125°C is the maximum limit of ambient (from the datasheet)
Max. Allowed Power
Max Junction Temp
Max. Ambient Temp
θ
JA
------------------------------------------------------------------------------------------------------------
150
°C 125°C
17.1
°C/W
----------------------------------------
1.46 W
==
=
TJ = 110°C
TA = 70°C
θ
JA = 18.0°C/W
θ
JC = 3.2 °C/W
P
Max Junction Temp
Max. Ambient Temp
θ
JA
------------------------------------------------------------------------------------------------------------
110
°C70°C
18.0
°C/W
------------------------------------
2.22 W
==
=
θ
JA
Max Junction Temp
Max. Ambient Temp
P
------------------------------------------------------------------------------------------------------------
110
°C70°C
3.00 W
------------------------------------
13.33
°C/W
==
=
相關(guān)PDF資料
PDF描述
A54SX72A-PQ208A IC FPGA SX-A 108K 208-PQFP
GBB95DHBR CONN EDGECARD 190PS R/A .050 SLD
ASM28DRKF-S13 CONN EDGECARD 56POS .156 EXTEND
FSM25DSES CONN EDGECARD 50POS .156 EYELET
ASM36DRYF CONN EDGECARD 72POS DIP .156 SLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A54SX72A-PQG208I 功能描述:IC FPGA SX-A 108K 208-PQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - FPGA(現(xiàn)場可編程門陣列) 系列:SX-A 產(chǎn)品培訓模塊:Three Reasons to Use FPGA's in Industrial Designs Cyclone IV FPGA Family Overview 特色產(chǎn)品:Cyclone? IV FPGAs 標準包裝:60 系列:CYCLONE® IV GX LAB/CLB數(shù):9360 邏輯元件/單元數(shù):149760 RAM 位總計:6635520 輸入/輸出數(shù):270 門數(shù):- 電源電壓:1.16 V ~ 1.24 V 安裝類型:表面貼裝 工作溫度:0°C ~ 85°C 封裝/外殼:484-BGA 供應商設(shè)備封裝:484-FBGA(23x23)
A54SX72A-PQG208M 制造商:Microsemi Corporation 功能描述:FPGA SX-A Family 72K Gates 4024 Cells 217MHz 0.25um Technology 2.5V 208-Pin PQFP 制造商:Microsemi Corporation 功能描述:FPGA SX-A 72K GATES 4024 CELLS 217MHZ 0.25UM/0.22UM 2.5V 208 - Trays
A54SX72A-PQG208X3 制造商:Microsemi Corporation 功能描述:SX-A 72K GATE 4024 MC 217MHZ COMM ANTIFUSE 2.5/3.3/5V 208QFP - Trays
A55 制造商:M/A-COM Technology Solutions 功能描述:GAIN BLOCK
A5-5 制造商:MA-COM 制造商全稱:M/A-COM Technology Solutions, Inc. 功能描述:Cascadable Amplifier 5 to 500 MHz