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參數(shù)資料
| 型號： | TC649VUA |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | CAPACITOR, CLASS Y2 22NFCAPACITOR, CLASS Y2 22NF; Capacitance:22nF; Voltage rating, AC:250V; Voltage rating, DC:2500V; Capacitor dielectric type:Polypropylene; Series:B81122; Tolerance, +:20%; Tolerance, -:20%; Temp, op. |
| 中文描述： | PWM風扇帶自動調(diào)速器關斷和FanSense⑩技術 |
| 文件頁數(shù)： | 7/28頁 |
| 文件大小： | 478K |
| 代理商： | TC649VUA |
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2002 Microchip Technology Inc.
DS21449C-page 7
TC649
4.0
SYSTEM BEHAVIOR
The flowcharts describing the TC649’s behavioral
algorithm are shown in Figure 4-1. They can be
summarized as follows:
4.1
Power-Up
(1) Assuming the device is not being held in shutdown
or auto-shutdown mode (V
IN
> V
AS
)...
(2) Turn V
OUT
output on for 32 cycles of the PWM
clock. This ensures that the fan will start from a
dead stop.
(3) During this Start-up Timer, if a fan pulse is
detected, branch to Normal Operation; if none are
received…
(4) Activate the 32-cycle Start-up Timer one more
time and look for fan pulse; if a fan pulse is
detected, proceed to Normal Operation; if none
are received…
(5) Proceed to Fan Fault.
(6) End.
4.2
Normal Operation
Normal Operation is an endless loop which may only
be exited by entering shutdown mode, auto-shutdown
mode or Fan Fault. The loop can be thought of as exe-
cuting at the frequency of the oscillator and PWM.
(1) Reset the missing pulse detector.
(2) Is TC649 in shutdown or auto-shutdown mode If
so…
a. V
OUT
duty cycle goes to zero.
b. FAULT is disabled.
c. Exit the loop and wait for V
IN
> (V
AS
+ V
HAS
) to
resume operation.
(3) Drive V
OUT
to a duty cycle proportional to V
IN
on a
cycle by cycle basis.
(4) If a fan pulse is detected, branch back to the start
of the loop (1).
(5) If the missing pulse detector times out …
(6) Activate the 3-cycle Diagnostic Timer and look for
pulses; if a fan pulse is detected, branch back to
the start of the loop (1); if none are received…
(7) Activate the 32-cycle Start-up Timer and look for
pulses; if a fan pulse is detected, branch back to
the start of the loop (1); if none are received…
(8) Quit Normal Operation and go to Fan Fault.
(9) End.
4.3
Fan Fault
Fan Fault is an infinite loop wherein the TC649 is
latched in shutdown mode. This mode can only be
released by a reset (i.e., V
IN
being brought below
V
SHDN
, then above (V
AS
+ V
HAS
) or by power-cycling).
(1) While in this state, FAULT is latched on (low) and
the
V
OUT
output is disabled.
(2) A reset sequence applied to the V
IN
pin will exit the
loop to Power-up.
(3) End.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TC649VUATR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Shtdn & Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)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 |
| TC6-4A11 | 制造商:FERROXCUBE 制造商全稱:Ferroxcube International Holding B.V. 功能描述:Ferrite toroids |
| TC6-4C65 | 制造商:FERROXCUBE 制造商全稱:Ferroxcube International Holding B.V. 功能描述:Ferrite toroids |
| TC65 | 功能描述:鋁質(zhì)電解電容器 - 帶引線 20uF 350Volts RoHS:否 制造商:Kemet 引線類型: 電容:220 uF 容差:20 % 電壓額定值:25 V 工作溫度范圍: 端接類型:Radial 外殼直徑:8 mm 外殼長度:11 mm 引線間隔:5 mm 產(chǎn)品:General Purpose Electrolytic Capacitors 封裝:Bulk |
| TC65 MODULE | 制造商:Siemens 功能描述:GSM/GPRS JAVA MODULE & B2B |
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