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参数资料
| 型号： | MMDF2C02HDR2 |
| 厂商： | MOTOROLA INC |
| 元件分类： | JFETs |
| 英文描述： | 3.8 A, 20 V, 0.09 ohm, 2 CHANNEL, N AND P-CHANNEL, Si, POWER, MOSFET |
| 封装： | SO-8 |
| 文件页数： | 3/12页 |
| 文件大小： | 356K |
| 代理商： | MMDF2C02HDR2 |
MMDF2C02HD
11
Motorola TMOS Power MOSFET Transistor Device Data
TYPICAL SOLDER HEATING PROFILE
For any given circuit board, there will be a group of control
settings that will give the desired heat pattern. The operator
must set temperatures for several heating zones and a figure
for belt speed. Taken together, these control settings make up
a heating “profile” for that particular circuit board. On
machines controlled by a computer, the computer remembers
these profiles from one operating session to the next. Figure
16 shows a typical heating profile for use when soldering a
surface mount device to a printed circuit board. This profile will
vary among soldering systems, but it is a good starting point.
Factors that can affect the profile include the type of soldering
system in use, density and types of components on the board,
type of solder used, and the type of board or substrate material
being used. This profile shows temperature versus time. The
line on the graph shows the actual temperature that might be
experienced on the surface of a test board at or near a central
solder joint. The two profiles are based on a high density and
a low density board. The Vitronics SMD310 convection/in-
frared reflow soldering system was used to generate this
profile. The type of solder used was 62/36/2 Tin Lead Silver
with a melting point between 177 –189
°C. When this type of
furnace is used for solder reflow work, the circuit boards and
solder joints tend to heat first. The components on the board
are then heated by conduction. The circuit board, because it
has a large surface area, absorbs the thermal energy more
efficiently, then distributes this energy to the components.
Because of this effect, the main body of a component may be
up to 30 degrees cooler than the adjacent solder joints.
STEP 1
PREHEAT
ZONE 1
“RAMP”
STEP 2
VENT
“SOAK”
STEP 3
HEATING
ZONES 2 & 5
“RAMP”
STEP 4
HEATING
ZONES 3 & 6
“SOAK”
STEP 5
HEATING
ZONES 4 & 7
“SPIKE”
STEP 6
VENT
STEP 7
COOLING
200
°C
150
°C
100
°C
50
°C
TIME (3 TO 7 MINUTES TOTAL)
TMAX
SOLDER IS LIQUID FOR
40 TO 80 SECONDS
(DEPENDING ON
MASS OF ASSEMBLY)
205
° TO 219°C
PEAK AT
SOLDER JOINT
DESIRED CURVE FOR LOW
MASS ASSEMBLIES
100
°C
150
°C
160
°C
170
°C
140
°C
Figure 16. Typical Solder Heating Profile
DESIRED CURVE FOR HIGH
MASS ASSEMBLIES
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MMDF2C03HD | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:COMPLEMENTARY DUAL TMOS POWER FET 2.0 AMPERES 30 VOLTS |
| MMDF2C03HDR2 | 功能描述:MOSFET 30V 2A RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| MMDF2C03HDR2G | 功能描述:MOSFET COMP S08C 30V 4.1A 70mOhm RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| MMDF2C03HDR2G | 制造商:ON Semiconductor 功能描述:MOSFET |
| MMDF2N02E | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Power MOSFET 2 Amps, 25 Volts N−Channel SO−8, Dual |
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