Conception de PCB

Y a-t-il des problèmes si je change 0805 aussi 0402 montage en surface ou plus petit?

0402 obviously is harder to hand assemble. If you need to get them assembled by machine, please notice the following tips.

  • The assembler’s pick & place machine can even handle 0402 at a good rate & rendement.
  • Double-sided load. Some boards just need this assembly step, like BGA often puts decoupling caps on the bottom of the board.
  • Propriétés électriques. The obvious one is, bien sûr, the power rating of resistors. Voltage rating is not only likely worse due to the physical smaller dimensions, but also consider the voltage bias degradation effect of ceramic class 2 condensateurs. For smaller packages in same voltage/capacitance, this effect may be worse.

D'autre part, some properties, like lead inductance, is lower. en plus, sometimes you can put capacitors right at the chip pins for QFP style packages, while routing signals underneath the chip. In effect, the loop area for the decoupling capacitor is much much smaller than a larger size capacitor, which may be placed further away to comply with signal routing.

Lire la suite: Services de conception et de mise en page de circuits imprimés

#Conception de PCB

Olivier Smith

Oliver est un ingénieur en électronique expérimenté, spécialisé dans la conception de PCB., circuits analogiques, systèmes embarqués, et prototypage. Ses connaissances approfondies couvrent la capture schématique, codage du micrologiciel, simulation, disposition, essai, et dépannage. Oliver excelle dans l'art de faire passer des projets du concept à la production de masse en utilisant ses talents de concepteur électrique et ses aptitudes en mécanique..

Messages récents

BGA Reballing: An Essential Process in Electronics Repair and Maintenance

BGA reballing emerges as a critical repair technique for modern electronic devices. Aujourd'hui, appareils électroniques…

6 days ago

What Are PCB Stiffeners? Exploring Their Types, Uses, and Thicknesses

Do you know what PCB stiffeners are? They are widely used in flex and rigid-flex

3 weeks ago

Why PCB Warpage Happens and How You Can Prevent It?

Dans le processus de fabrication des PCB, PCB warpage is a common problem that manufacturers would encounter.

1 month ago

What Is a PCB Netlist? Tout ce que vous devez savoir est ici

In the world of printed circuit board design and manufacturing, precision and accuracy are paramount.

2 months ago

What Is Solder Wetting and How to Prevent Poor Wetting?

Soldering is a cornerstone technique in electronics assembly, it's used to connect electrical pieces and

2 months ago

7 Critical Techniques to Improve PCB Thermal Management

Aujourd'hui, electronic products are both compact and lightweight while performing a variety of functions. Ce…

2 months ago