![]() |
Electronic Components Datasheet Search |
|
F75373S Datasheet(PDF) 14 Page - Feature Integration Technology Inc. |
|
|
F75373S Datasheet(HTML) 14 Page - Feature Integration Technology Inc. |
14 / 49 page ![]() Fintek Feature Integration Technology Inc. V0.25P 9 F75373 5.4.3 Fan speed control mechanism There are 3 modes to control fan speed and they are manual, fan speed mode and temperature mode. For manual mode, it generally acts as PWM fan speed control. As for speed mode and temperature mode, they are more intelligent fan speed control and described as below: 5.4.3.1 Fan Speed mode Fan speed mode is an intelligent method according to expected fan speed pre-setting by BIOS. In the beginning, fan speed will operate at full speed and the F75373S will get the full speed count value. Then fan speed slows down to rotate at about 72.5% (8/11) of full speed. After that, the fan speed will automatically rotate according to the expected fan speed setting by BIOS. The register CR74h and CR75h are used for this mode. 5.4.3.2 Temperature mode At this mode, F75373S provides the clever system to automatically control fan speed related to temperature of GPU or the system. The F75373S can provide four temperature boundaries and five intervals, and each interval has its related fan speed count. All these values should be set by BIOS first. Take figure 5-11 as example. When temperature setting value is 45,55,65, and 75 °C. There are five intervals and each interval is 10°C. The related desired fan speed counts for each interval are 0500h, 0400h, 0300h, 0200h, 0100h. When the temperature is within 55~65 °C, the fan speed count 300h will be load into FAN EXPECT COUNTregisters(CR74h~CR75h, CR84h~CR85h). Then, F75373S will adjust PWMOUT duty-cycle to make fan speed match the expected value. It can be said that the fan will be turned on with a specific speed set by BIOS and automatically controlled with the temperature varying. The F75373S will take charge of all the fan speed control and need no software support. Desired Counts 0100h 0200h 0300h 0400h 0500h 75 Degree C 65 Degree C 55 Degree C 45 Degree C Figure 5-11 |
Similar Part No. - F75373S |
|
Similar Description - F75373S |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |