参数资料
型号: 7140DG
厂商: Aavid Thermalloy
文件页数: 106/116页
文件大小: 0K
描述: BOARD LEVEL HEAT SINK
产品培训模块: How to Select a Heat Sink
标准包装: 1,000
类型: 插件板级
冷却式包装: TO-220
固定方法: 夹和 PC 引脚
形状: 矩形
长度: 0.700"(17.78mm)
宽: 0.90"(22.86mm)
机座外的高度(散热片高度): 0.375"(9.52mm)
温升时的功耗: 1.5W @ 50°C
在强制气流下的热敏电阻: 在 200 LFM 时为10.0°C/W
自然环境下的热电阻: 20.8°C/W
材质:
材料表面处理:
其它名称: 043239
9
HO
W
T
O
S
ELECT
A
HEA
T
SINK
EUROPE
ASIA
Italy Tel: +39 051 764011 email: sales.it@aavid.com
United Kingdom Tel: +44 1793 401400 email: sales.uk@aavid.com
Singapore Tel: +65 6362 8388 email: sales@aavid.com.sg
Taiwan Tel: +886(2) 2698-9888 email: sales@aavid.com.tw
AMERICA
USA Tel: +1 (603) 224-9988 email: info@aavid.com
www.aavidthermalloy.com
The basic equation for heat transfer or power dissipation may be stated as follows:
Where:
PD = the power dissipated by the semiconductor device in watts.
ΔT = the temperature difference of driving potential which causes the flow of heat.
ΣRθ = the sum of the thermal resistances of the heat flow path across which ΔT exists.
The above relationship may be stated in the following forms:
The above equations are generally used to determine the required thermal resistance of the heat sink (RθSA),
since the heat dissipation, maximum junction and/or case temperature, and ambient temperature are known or set.
How To Select a Heat Sink
Where:
TJ = the junction temperature in °C (maximum is usually stated by the manufacturer of the semiconductor device).
TC = case temperature of the semiconductor device in °C.
TS = temperature of the heat sink mounting surface in thermal contact with the semiconductor device in °C.
TA = ambient air temperature in °C.
RθJC = thermal resistance from junction to case of the semiconductor device in °C per watt
(usually stated by manufacturer of semiconductor device).
RθCS = thermal resistance through the interface between the semiconductor device
and the surface on which it is mounted in °C per watt.
RθSA = thermal resistance from mounting surface to ambient or thermal resistance of heat sink in °C per watt.
Figure 1 indicates the location of the various heat
flow paths, temperatures and thermal resistances.
The common practice is to represent the system with
a network of resistances in series as shown in Figure 2.
Atmosphere
or ambient
Mounting surface
(cooler/dissipator)
Semiconductor case
Junction
(heat source)
Interface
Heat flow path mounting
surface to ambient, equation (3)
Heat flow path case
to ambient equation (2)
Heat flow path junction
to ambient, equation (1)
P
D
P
D
T
A
R
θSA
R
θCS
R
θJC
T
S
T
C
T
A
T
J
TJ–TA
PD =
RθJC + RθCS + RθSA
TC–TA
PD =
RθCS + RθSA
TS–TA
PD =
RθSA
Δ T
PD =
ΣRθ
RθCS
RθJC
TS
TA
TJ
RθSA
TC
FIGURE 1
FIGURE 2
How to select a heat sink
相关PDF资料
PDF描述
SOMC160351R0GEA RES ARRAY 51 OHM 8 RES 16-SOIC
1-767096-0 CONN RCPT 114POS .025 VERT SMD
309157970000035 COVER SCREW FOR 9157 SERIES 3.5M
767116-2 CONN PLUG 76POS .025 VERT SMD
6225B-MTG BOARD LEVEL HEAT SINK
相关代理商/技术参数
参数描述
7140E 制造商:Excelta Corporation 功能描述:ROUND CUTTER SEMI FLUSH 0.042IN 5.75IN 制造商:Excelta Corporation 功能描述:ROUND CUTTER, SEMI FLUSH, 0.042IN 5.75IN; Overall Length:5.75"; Cutter Type:Round Head; Cut Type:Semi Flush; Cutting Capacity Max:0.042" ;RoHS Compliant: NA
7140LA100C 制造商:Integrated Device Technology Inc 功能描述:SRAM Chip Async Dual 5V 8K-Bit 1K x 8 100ns 48-Pin SBCDIP 制造商:Integrated Device Technology Inc 功能描述:SRAM ASYNC DUAL 5V 8KBIT 1KX8 100NS 48PIN SBDIP - Bulk
7140LA100CB 制造商:Integrated Device Technology Inc 功能描述:SRAM Chip Async Dual 5V 8K-Bit 1K x 8 100ns 48-Pin SBCDIP Tube 制造商:Integrated Device Technology Inc 功能描述:SRAM ASYNC DUAL 5V 8KBIT 1KX8 100NS 48PIN SBDIP - Bulk
7140LA100J 功能描述:静态随机存取存储器 RoHS:否 制造商:Cypress Semiconductor 存储容量:16 Mbit 组织:1 M x 16 访问时间:55 ns 电源电压-最大:3.6 V 电源电压-最小:2.2 V 最大工作电流:22 uA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TSOP-48 封装:Tray
7140LA100J8 功能描述:静态随机存取存储器 RoHS:否 制造商:Cypress Semiconductor 存储容量:16 Mbit 组织:1 M x 16 访问时间:55 ns 电源电压-最大:3.6 V 电源电压-最小:2.2 V 最大工作电流:22 uA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TSOP-48 封装:Tray