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参数资料
| 型号： | MMFT3055VLT1G |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 小信号晶体管 |
| 英文描述： | 1500 mA, 60 V, N-CHANNEL, Si, SMALL SIGNAL, MOSFET, TO-261AA |
| 封装： | CASE 318E-04, 4 PIN |
| 文件页数： | 10/10页 |
| 文件大小： | 219K |
| 代理商： | MMFT3055VLT1G |
MMFT3055VL
http://onsemi.com
9
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 18 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/infrared 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
177189°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
5°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
DESIRED CURVE FOR HIGH
MASS ASSEMBLIES
100°C
150°C
160°C
170°C
140°C
Figure 16. Typical Solder Heating Profile
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PDF描述 |
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| MMFT3055VLT3G | 1500 mA, 60 V, N-CHANNEL, Si, SMALL SIGNAL, MOSFET, TO-261AA |
| MMFT3055VLT3 | 1500 mA, 60 V, N-CHANNEL, Si, SMALL SIGNAL, MOSFET, TO-261AA |
| MMFT3055VLT1 | 1500 mA, 60 V, N-CHANNEL, Si, SMALL SIGNAL, MOSFET, TO-261AA |
| MMFT3055VLT3 | 1500 mA, 60 V, N-CHANNEL, Si, SMALL SIGNAL, MOSFET, TO-261AA |
| MMFT3055VLT1 | 1500 mA, 60 V, N-CHANNEL, Si, SMALL SIGNAL, MOSFET, TO-261AA |
相关代理商/技术参数 |
参数描述 |
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| MMFT3055VT1 | 制造商:ON Semiconductor 功能描述:Trans MOSFET N-CH 60V 1.7A 4-Pin(3+Tab) SOT-223 T/R |
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| MMFT5P03HDT1 | 功能描述:MOSFET P-CH 30V 3.7A SOT223 RoHS:否 类别:分离式半导体产品 >> FET - 单 系列:- 标准包装:1,000 系列:MESH OVERLAY™ FET 型:MOSFET N 通道，金属氧化物 FET 特点:逻辑电平门 漏极至源极电压(Vdss):200V 电流 - 连续漏极(Id) @ 25° C:18A 开态Rds（最大）@ Id, Vgs @ 25° C:180 毫欧 @ 9A，10V Id 时的 Vgs(th)（最大）:4V @ 250µA 闸电荷(Qg) @ Vgs:72nC @ 10V 输入电容 (Ciss) @ Vds:1560pF @ 25V 功率 - 最大:40W 安装类型:通孔 封装/外壳:TO-220-3 整包 供应商设备封装:TO-220FP 包装:管件 |
| MMFT5P03HDT3 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:TMOS P-CHANNEL FIELD FEECT TRANSISTOR |
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