Electronic Components Datasheet Search |
|
SI7236DP-T1-GE3 Datasheet(PDF) 8 Page - Vishay Siliconix |
|
SI7236DP-T1-GE3 Datasheet(HTML) 8 Page - Vishay Siliconix |
8 / 13 page Vishay Siliconix AN821 Document Number 71622 28-Feb-06 www.vishay.com 1 PowerPAK® SO-8 Mounting and Thermal Considerations Wharton McDaniel MOSFETs for switching applications are now available with die on resistances around 1 m Ω and with the capability to handle 85 A. While these die capabilities represent a major advance over what was available just a few years ago, it is important for power MOSFET packaging technology to keep pace. It should be obvi- ous that degradation of a high performance die by the package is undesirable. PowerPAK is a new package technology that addresses these issues. In this appli- cation note, PowerPAK’s construction is described. Following this mounting information is presented including land patterns and soldering profiles for max- imum reliability. Finally, thermal and electrical perfor- mance is discussed. THE PowerPAK PACKAGE The PowerPAK package was developed around the SO-8 package (Figure 1). The PowerPAK SO-8 uti- lizes the same footprint and the same pin-outs as the standard SO-8. This allows PowerPAK to be substi- tuted directly for a standard SO-8 package. Being a leadless package, PowerPAK SO-8 utilizes the entire SO-8 footprint, freeing space normally occupied by the leads, and thus allowing it to hold a larger die than a standard SO-8. In fact, this larger die is slightly larger than a full sized DPAK die. The bottom of the die attach pad is exposed for the purpose of providing a direct, low resistance thermal path to the substrate the device is mounted on. Finally, the package height is lower than the standard SO-8, making it an excellent choice for applications with space constraints. PowerPAK SO-8 SINGLE MOUNTING The PowerPAK single is simple to use. The pin arrangement (drain, source, gate pins) and the pin dimensions are the same as standard SO-8 devices (see Figure 2). Therefore, the PowerPAK connection pads match directly to those of the SO-8. The only dif- ference is the extended drain connection area. To take immediate advantage of the PowerPAK SO-8 single devices, they can be mounted to existing SO-8 land patterns. The minimum land pattern recommended to take full advantage of the PowerPAK thermal performance see Application Note 826, Recommended Minimum Pad Patterns With Outline Drawing Access for Vishay Sili- conix MOSFETs. Click on the PowerPAK SO-8 single in the index of this document. In this figure, the drain land pattern is given to make full contact to the drain pad on the PowerPAK package. This land pattern can be extended to the left, right, and top of the drawn pattern. This extension will serve to increase the heat dissipation by decreasing the ther- mal resistance from the foot of the PowerPAK to the PC board and therefore to the ambient. Note that increasing the drain land area beyond a certain point will yield little decrease in foot-to-board and foot-to- ambient thermal resistance. Under specific conditions of board configuration, copper weight and layer stack, experiments have found that more than about 0.25 to 0.5 in2 of additional copper (in addition to the drain land) will yield little improvement in thermal perfor- mance. Figure 1. PowerPAK 1212 Devices Figure 2. Standard SO-8 PowerPAK SO-8 |
Similar Part No. - SI7236DP-T1-GE3 |
|
Similar Description - SI7236DP-T1-GE3 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |