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参数资料
| 型号： | LSM-0.75/16-D12-C |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, SMT-6 |
| 文件页数： | 3/12页 |
| 文件大小： | 381K |
| 代理商： | LSM-0.75/16-D12-C |
Figure 6. Reow Solder Prole
HEAT SHIELD OUTSIDE TEMPERATURE
Sn96.5/Ag3.5 Melting Point
Sn63/Pb37 Melting Point
250
200
150
100
50
0
50
100
150
200
250
300
350
400
221
183
PCB TEMPERATURE INSIDE THE HEAT SHIELD
T
emperature
(
C)
Time (Seconds)
Tape & Reel Surface Mount Package
Murata Power Solutions’ LSM series DC/DC converters are the only higher-
current (16A) SMT DC/DCs that can be automatically “pick-and-placed” using
standard vacuum-pickup equipment (nozzle size and style, vacuum pressure
and placement speed may need to be optimized for automated pick and place)
and subsequently reowed using high-temperature, lead-free solder.
Virtually all SMT DC/DCs today are unprotected “open-frame” devices
assembled by their vendors with high-temperature solder (usually Sn96.5/
Ag3.5 with a melting point of +221°C) so that you may attach them to your
board using low-temperature solder (usually Sn63/Pb37 with a melting point
of +183°C). Conceptually straightforward, this “stepped” solder approach has
its limitations, and it is clearly out of step with an industry trending toward
the broad use of lead-free solders. Are you to experiment and develop reow
proles from other vendors that ensure the components on those DC/DC never
exceed 215–216°C? If those components get too hot, “double-reow” could
compromise the reliability of their solder joints. Virtually all these devices
demand you “cool down” the Sn63 prole you are likely using today.
MPS is not exempted from the Laws of Physics, and we do not have magic
solders no one else has. Nevertheless, we have a simple and practical, straight-
forward approach that works. We assemble our LSM SMT DC/DCs using a
high-temperature (+216°C), lead-free alloy (Sn96.2%, Ag2.5%, Cu0.8%,
Sb0.5%). The LSM design ensures co-planarity to within 0.004 inches (100μm)
of the unit’s copper leads. These leads are gold-plated with a nickel underplate.
See Mechanical Data for additional information.
The disposable heat shield (patent pending), which has a cutaway expos-
ing the package leads, provides thermal insulation to internal components
during reow and its smooth surface ideally doubles as the vacuum pick-up
location also. The insulation properties of the heat shield are so effective that
temperature differentials as high as 50°C develop inside-to-outside the shield.
Oven temperature proles with peaks of 250–260°C and dwell times exceed-
ing 2 minutes above 221°C (the melting point of Sn96.5/Ag3.5) are easily
achieved.
LSM-16A D12 Models
Non-Isolated, 13-80W SMT DC/DC Converters
MDC_LSM 16A D12 Models.A05 Page 11 of 12
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LSM-1 | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Single Output, Non-Isolated, 3.3VIN, 0.8-2.5VOUT 10 Amp DC/DC’s in SMT Packages |
| LSM-1.2 | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Single Output, Non-Isolated, 3.3VIN, 0.8-2.5VOUT 10 Amp DC/DC’s in SMT Packages |
| LSM-1.2/10-D12 | 制造商:Murata Power Solutions 功能描述:DC/DC SM 10A 10-14V IN,1.2V OUT, NON-ISO - Tape and Reel 制造商:Murata Power Solutions 功能描述:Module DC-DC 1-OUT 1.2V 10A 6-Pin SMT |
| LSM-1.2/10-D12-C | 功能描述:DC/DC转换器 12W 12V to 1.2V 10A RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| LSM-1.2/10-D12EB | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:10 Amp DC/DC Power Converter Evaluation Boards |
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