TWM390647U - Power supply circuit and fan driving circuit thereof with auto-regulated rotation speed - Google Patents
Power supply circuit and fan driving circuit thereof with auto-regulated rotation speedInfo
- Publication number
- TWM390647U TWM390647U TW099207893U TW99207893U TWM390647U TW M390647 U TWM390647 U TW M390647U TW 099207893 U TW099207893 U TW 099207893U TW 99207893 U TW99207893 U TW 99207893U TW M390647 U TWM390647 U TW M390647U
- Authority
- TW
- Taiwan
- Prior art keywords
- circuit
- signal
- pwm
- auto
- rotation speed
- Prior art date
Links
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Power supply circuit and fan driving circuit thereof with auto-reg-ulated rotation speed is disclosed.The fan driving circuit with auto-regulated rotation speed includes a PWM generating circuit, a feedback circuit, a first temperature sensing circuit and a calculation circuit.The PWM generating circuit generates a PWM signal to fan so that the rota-tion speed varies according to the PWM signal.The feedback circuit generates a feedback signal according to the PWM signal.The first tem-perature sensing circuit detects an operation temperature of the hot ob- ject and generates a corresponding first temperature signal accord-ingly.The calculation circuit computes a computing signal to the PWM generating circuit according to the feedback signal and the first temper-ature signal.The PWM generating circuit generates the PWM signal ac-cording to the computing signal.The duty cycle of the PWM signal is in-creased when the operation temperature is increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW099207893U TWM390647U (en) | 2010-04-29 | 2010-04-29 | Power supply circuit and fan driving circuit thereof with auto-regulated rotation speed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW099207893U TWM390647U (en) | 2010-04-29 | 2010-04-29 | Power supply circuit and fan driving circuit thereof with auto-regulated rotation speed |
Publications (1)
Publication Number | Publication Date |
---|---|
TWM390647U true TWM390647U (en) | 2010-10-11 |
Family
ID=60587866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW099207893U TWM390647U (en) | 2010-04-29 | 2010-04-29 | Power supply circuit and fan driving circuit thereof with auto-regulated rotation speed |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWM390647U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI507607B (en) * | 2012-09-03 | 2015-11-11 | Hon Hai Prec Ind Co Ltd | Fan speed control circuit |
TWI550193B (en) * | 2014-08-13 | 2016-09-21 | 台達電子工業股份有限公司 | Fan-controlling devices |
US10954950B2 (en) | 2014-08-12 | 2021-03-23 | Delta Electronics, Inc. | Fan control device with multiprocessor |
TWI734579B (en) * | 2020-08-10 | 2021-07-21 | 海韻電子工業股份有限公司 | Fan drive circuit with temperature compensation |
-
2010
- 2010-04-29 TW TW099207893U patent/TWM390647U/en not_active IP Right Cessation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI507607B (en) * | 2012-09-03 | 2015-11-11 | Hon Hai Prec Ind Co Ltd | Fan speed control circuit |
US10954950B2 (en) | 2014-08-12 | 2021-03-23 | Delta Electronics, Inc. | Fan control device with multiprocessor |
TWI550193B (en) * | 2014-08-13 | 2016-09-21 | 台達電子工業股份有限公司 | Fan-controlling devices |
TWI734579B (en) * | 2020-08-10 | 2021-07-21 | 海韻電子工業股份有限公司 | Fan drive circuit with temperature compensation |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4K | Annulment or lapse of a utility model due to non-payment of fees |