Strictly necessary cookies are on by default and cannot be turned off. Functional, Performance and Tracking/targeting/sharing cookies can be turned on below based on your preferences (this banner will remain available for you to accept cookies). You may change your cookie settings by deleting cookies from your browser. Then this banner will appear again. You can learn more details about cookies HERE.

Strictly necessary (always on)

Functional, Performance and Tracking/targeting/sharing (default off)

Turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page

New Contributor

Jan 10, 2019
08:24 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi,

I am using S25FL512SDSMFBG10 in my design, what is the maximum junction temperature I have to consider?

Also the Active Power Supply Current (WRR) (ICC3) specified in the datasheet is applicable to the maximum frequency of operation?

If I am operating at a frequency below the maximum frequency, will the Active Power Supply Current (WRR) (ICC3) maximum will be less than 100mA?

Solved! Go to Solution.

1 Solution

Moderator

Jan 11, 2019
03:57 AM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi,

The Theta Ja vale is 30°C/W and Psi Jt value is 0.25°C/W. You can use the following Application Note (http://www.cypress.com/file/210756/download ) to calculate the value of Tj. Please let me know if you have any further queries regrading this.

Regarding Active Power Supply Current query, if operating at a lower frequency the Active Power Supply Current should be lower than the maximum value. Could you please let me know which frequency you are operating on?

Thanks and Regards,

Apurva

8 Replies

Moderator

Jan 11, 2019
03:57 AM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi,

The Theta Ja vale is 30°C/W and Psi Jt value is 0.25°C/W. You can use the following Application Note (http://www.cypress.com/file/210756/download ) to calculate the value of Tj. Please let me know if you have any further queries regrading this.

Regarding Active Power Supply Current query, if operating at a lower frequency the Active Power Supply Current should be lower than the maximum value. Could you please let me know which frequency you are operating on?

Thanks and Regards,

Apurva

New Contributor

Jan 14, 2019
07:32 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi,

Thank you for support.

I Know that the junction temperature can be calculated using the formula. I want to know the maximum junction temperature supported by my device. I am doing worst case Analysis so I have keep a margin in junction temperature.

Using values in the datasheet for calculating junction temperature in the following formula

PH = ICC3*VCC = 100mA*3.6V = 360mW

Tj = 30.6°C/W * 360mW + 105°C = 116.016°C

Whether 116.016°C is the maximum junction temperature for S25FL512SDSMFBG10 device?

I am using 80MHz DDR. Whether ICC2, ICC3, ICC4, ICC5 will vary with the frequency I am using? How I can calculate the ICC2, ICC3, ICC4, ICC5 according to frequency of use?

This is the link of datasheet I am using http://www.cypress.com/file/177971/download

Thanks & Regards,

Alphonsa Yohannan

Moderator

Jan 16, 2019
01:20 AM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi Alphonsa,

Regarding maximum junction temperature, I shall get back to you on this.

Regarding Active Power Supply Current, the values of ICC2, ICC3, ICC4 and ICC5 will always remain less than 100mA, regardless of the frequency.

Thanks and Regards,

Apurva

New Contributor

Jan 17, 2019
08:58 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi,

Thank you for your update.

Any information on maximum junction temperature?

Best Regards,

Alphonsa

New Contributor

Jan 27, 2019
10:03 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi,

Whether the junction temperature is above 125°C?

Best Regards,

Alphonsa

Moderator

Feb 03, 2019
09:42 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi Alphonsa,

Could you please let me know your layer count and the size of the board?

Regards,

Apurva

New Contributor

Feb 03, 2019
09:52 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi Apurva,

Layer count is 10.

Board size is 150mmx100mm.

Could you please let me know the dependency of size of board in maximum junction temperature?

Thanks & Regards,

Alphonsa

Moderator

Feb 28, 2019
09:37 PM

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

Hi Alphonsa,

If program/erase are their worst case operations then we are okay with the above Tjmax calculation.

If however read is the worst operation then we need to know the application (total cap load) as well as frequency.

Could you please tell us how you are using our flash device?

e.g. What is the percentage of program/erase read operation performed in the application?

Regards,

Apurva