參數(shù)資料
型號： TC646VPA
廠商： Microchip Technology Inc.
英文描述： PWM Fan Speed Controller with Auto-Shutdown and FanSense⑩ Technology
中文描述： PWM風扇帶自動調速器關斷和FanSense⑩技術
文件頁數(shù)： 7/28頁
文件大?。?/td> 473K
代理商： TC646VPA
2002 Microchip Technology Inc.
DS21446C-page 7
TC646
FIGURE 3-1:
TC646 Nominal Operation.
3.7
Shutdown Mode (Reset)
If an unconditional shutdown and/or device reset is
desired, the TC646 may be placed in shutdown mode
by forcing V
IN
to a logic low (i.e., V
IN
< V
SHDN
) (see
Figure 3-1). In this mode, all functions cease and the
FAULT output is unconditionally inactive. The TC646
should not be shut down unless all heat producing
activity in the system is at a negligible level. The TC646
exits shutdown mode when V
IN
becomes greater than
V
REL
, the release voltage.
Entering shutdown mode also performs a complete
device reset. Shutdown mode resets the TC646 into its
power-up state. The Start-up and Fault Timers, and any
current faults, are cleared. FAULT is unconditionally
inactive in shutdown mode. Upon exiting shutdown
mode (V
IN
> V
REL
), the Start-up Timer will be triggered
and normal operation will resume, assuming no fault
conditions exist and V
IN
> V
AS
+ V
HAS
If a fan fault has occurred and the device has latched
itself into shutdown mode, performing a reset will not
clear the fault unless V
IN
> (V
AS
+ V
HAS
). If V
IN
is not
greater than (V
AS
+ V
HAS
) upon exiting shutdown
mode, the fan will not be restarted. Consequently, there
is no way to establish that the fan fault has been
cleared. To ensure that a complete reset takes place,
the user’s circuitry must ensure that V
IN
> (V
AS
+ V
HAS
)
when the device is released from shutdown mode. A
recommended algorithm for management of the TC646
by a host microcontroller or other external circuitry is
given in Section 5.0, “Typical Applications”. A small
amount of hysteresis, typically one percent of V
DD
(50 mV at V
DD
= 5.0V), is designed into the V
SHDN
/
V
REL
threshold. The levels specified for V
SHDN
and
V
REL
in Section 1.0, “Electrical Characteristics”,
include this hysteresis plus adequate margin to
account for normal variations in the absolute value of
the threshold and hysteresis.
2.6V
V
AS
+ V
HAS
V
IN
t
RESET
V
REL
V
SHDN
V
AS
1.2V
TC646
Status
Normal
Operation
Auto-Shutdown
Mode
Normal
Operation
Shut-
Down
Normal
Operation
GND
Time
TEMP.
HI
LO
Note:
If V
IN
< V
AS
when the device exits shutdown
mode, the fan will not restart as it will be in auto-shut-
down mode.
CAUTION:
Shutdown mode is unconditional. That is,
the fan will remain off as long as the V
IN
pin is being
held low or V
IN
< V
AS
+ V
HAS
.
相關PDF資料
PDF描述
TC646VOA PWM Fan Speed Controller with Auto-Shutdown and FanSense⑩ Technology
TC647EOA PWM Fan Speed Controller with FanSense Technology
TC647VOA PWM Fan Speed Controller with FanSense Technology
TC647VPA PWM Fan Speed Controller with FanSense Technology
TC647VUA PWM Fan Speed Controller with FanSense Technology
相關代理商/技術參數(shù)
參數(shù)描述
TC646VUA 功能描述:馬達/運動/點火控制器和驅動器 Shtdn & Fault Dtct RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
TC646VUA713 功能描述:馬達/運動/點火控制器和驅動器 Shtdn & Fault Dtct RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
TC647 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSense Technology
TC647_13 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSensea?￠ Technology
TC647B 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense⑩ Technology for Fault Detection
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*