REGISTER | LOGIN
Home    Bloggers    Blogs    Article Archives    Messages    About Us   
Tw  |  Fb  |  In  |  Rss
Comments
Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
goafrit2
goafrit2
11/27/2013 1:43:23 PM
User Rank
Master
Re: Other protection circuits
>> then adding a little heatsink to the MOSFET may help.

How can you put heatsink in a MOSFET. Do you mean a chip?

50%
50%
goafrit2
goafrit2
11/27/2013 1:42:22 PM
User Rank
Master
Re: Other protection circuits
>>  photonic chip could be used to complex device by photonics design automation tool-set

What is a photonic chip?

50%
50%
samicksha
samicksha
11/13/2013 4:36:14 AM
User Rank
Artist
Re: Other protection circuits
 I am sure it is not necessary to put a heatsink on the MOSFET, but yes, the heatsink must be insulated, again if i like to use the temperature control for an unusually high load, then adding a little heatsink to the MOSFET may help.

50%
50%
DaeJ
DaeJ
11/9/2013 10:56:09 PM
User Rank
Master
Re: Other protection circuits
First, if you are considering dynamic and static power dissipation, you would select other ASIC chip. Second, photonic chip could be used to complex device by photonics design automation tool-set, not by electronic design automation.

50%
50%
fasmicro
fasmicro
11/9/2013 7:58:04 PM
User Rank
Master
Re: Other protection circuits
Heat sink is not done at the circuit level. These are things done at the board level. It is a different strategy when you are still at the ASIC level. How can you reduce dynamic power dissipation? Static power dissipation etc? These are real issues that one must think through when choosing process technology in ASIC design

50%
50%
fasmicro
fasmicro
11/9/2013 7:55:58 PM
User Rank
Master
Re: Other protection circuits
>>I agree you fasmicro, but increasing density of MOSFET on an IC creates problems of heat generation that can impair circuit operation 

Not necessarily - that you have more transistors in a circuit is not the reason why you have more heat. I think when you discuss power disspitation, you are looking at the feasture size of the transistor and not necessarily how many of them are in a circuit

50%
50%
JAYARAMAN KIRUTHI VASAN
JAYARAMAN KIRUTHI VASAN
10/30/2013 11:17:21 AM
User Rank
Master
Re: Other protection circuits
Thanks willie.

I also would like to add that , in case of SCR, only triggering is needed and there is no need for maintaining the ON status. However, the Gate voltage has to remain in the active state as long as the FET is expected to be ON.

50%
50%
Willie Chan
Willie Chan
10/29/2013 12:52:52 PM
User Rank
Blogger
Re: Other protection circuits
My apologies for the delay in my reply, this blog posted to the web right before a 10 day vacation with family.

@ Jayaraman: You are correct that SCRs are current triggered devices, however for simplicity we compared the VT of the MOSFET with the VGT of the SCRs i.e. the voltage required to create the necessary current to trigger the SCRs as specified in the respective datasheets.

To address others' question whether heatsink makes sense: As evidenced in Figure 2, within 40μs of being activated the crowbar MOSFET no longer dissipates any power therefore a heatsink is of little value.

 

 

50%
50%
yalanand
yalanand
10/27/2013 7:11:53 AM
User Rank
Master
Re : OVP Methods: MOSFET vs. SCR - Who Wins?
All workstations of SCR, MOSFET and IGBT are completed with proper colours of banana connectors. Distinct Triggering pulse is delivered for each device.

50%
50%
DaeJ
DaeJ
10/18/2013 4:04:27 PM
User Rank
Master
Re: Other protection circuits
I think that adding heat sink might be helpful for heating issue around MOSFET unless there is a space related to problem in the PCB board.

50%
50%
Page 1 / 2   >   >>


latest blogs
A battery management system (BMS), in addition to many other functions, has to closely monitor voltage, current, and the temperature of battery cells and packs. Temperature measurement is important in preserving the operational characteristics of both the cells and the BMS itself, as well as optimizing the state of health (SOH) by preventing degradation.
NFC technology may help to track and monitor the sun exposure level
Near Field Communication (NFC) technology offers many interesting options in the application of smart ICs realized through electronics technology.
How to generate the open-loop SPICE simulation curves: Open or “break” the loop while injecting a small signal into a high-Z node and look at the response at different points in the loop
flash poll
educational resources
 
follow Planet Analog on Twitter
Planet Analog Twitter Feed
like us on facebook
our partners
Planet Analog
About Us     Contact Us     Help     Register     Twitter     Facebook     RSS