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参数资料
| 型号： | TC646VUA |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封装： | PLASTIC, MSOP-8 |
| 文件页数： | 27/28页 |
| 文件大小： | 473K |
| 代理商： | TC646VUA |
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TC646
DS21446C-page 8
2002 Microchip Technology Inc.
4.0
SYSTEM BEHAVIOR
The flowcharts describing the TC646’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 auto-shut-
down mode (VIN > VAS)..........
(2) Turn VOUT 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
executing at the frequency of the oscillator and PWM.
(1) Reset the missing pulse detector.
(2) Is the TC646 in shutdown or auto-shutdown
mode?
If so...
a. VOUT duty cycle goes to zero.
b. FAULT is disabled.
c. Exit the loop and wait for VIN > (VAS + VHAS) to
resume operation.
(3) If an over-temperature fault occurs (VIN > VOTF),
activate FAULT; release FAULT when
VIN< VOTF.
(4) Drive VOUT to a duty cycle proportional to VIN on
a cycle by cycle basis.
(5) If a fan pulse is detected, branch back to the
start of the loop (1).
(6) If the missing pulse detector times out …
(7) 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…
(8) 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…
(9) Quit Normal Operation and go to Fan Fault.
(10) End.
4.3
Fan Fault
Fan fault is an infinite loop wherein the TC646 is
latched in shutdown mode. This mode can only be
released by a reset (i.e., VIN being brought below
VSHDN, then above (VAS + VHAS), or by power-cycling).
(1) While in this state, FAULT is latched on (low) and
the VOUT output is disabled.
(2) A reset sequence applied to the VIN pin will exit the
loop to Power-up.
(3) End.
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相关代理商/技术参数 |
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|---|---|
| TC646VUA713 | 功能描述:马达/运动/点火控制器和驱动器 Shtdn & Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TC647 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSense Technology |
| TC647_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSensea?￠ Technology |
| TC647B | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense⑩ Technology for Fault Detection |
| TC647BEOA | 功能描述:马达/运动/点火控制器和驱动器 w/Rstrt & Flt Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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