- 您现在的位置：买卖IC网 > PDF目录98170 > TC642BEOA713 BRUSHLESS DC MOTOR CONTROLLER, PDSO8 PDF资料下载
参数资料
| 型号： | TC642BEOA713 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SOIC-8 |
| 文件页数： | 7/34页 |
| 文件大小： | 683K |
| 代理商： | TC642BEOA713 |
第1页第2页第3页第4页第5页第6页当前第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
2003 Microchip Technology Inc.
DS21756B-page 15
TC642B/TC647B
.
FIGURE 4-7:
Fan Current With
Commutation Pulses To Zero.
The SENSE pin senses positive voltage pulses that
have an amplitude of 70 mV (typical value). When a
pulse is detected, the missing pulse detector timer is
reset. As previously stated, if the missing pulse detec-
tor timer reaches the time for 32 cycles, the loop for
diagnosing a fan fault is engaged (diagnostic timer,
then the start-up timer).
Both of the fan current waveshapes that are shown in
scheme shown in Figure 4-8.
FIGURE 4-8:
Sensing Scheme For Fan
Current.
The fan current flowing through RSENSE generates a
voltage that is proportional to the current. The CSENSE
capacitor removes any DC portion of the voltage
across RSENSE and presents only the voltage pulse
portion to the SENSE pin of the TC642B/TC647B
devices.
The RSENSE and CSENSE values need to be selected so
that the voltage pulse provided to the SENSE pin is
70 mV (typical) in amplitude. Be sure to check the
sense pulse amplitude over all operating conditions
(duty cycles), as the current pulse amplitude will vary
with duty cycle. See Section 5.0, “Applications Informa-
tion”, for more details on selecting values for RSENSE
and CSENSE.
Key features of the SENSE pin circuitry are an initial
blanking period after every VOUT pulse and an initial
pulse blanker.
The TC642B/TC647B sense circuitry has a blanking
period that occurs at the turn-on of each VOUT pulse.
During this blanking period, the sense circuitry ignores
any pulse information that is seen at the SENSE pin
input. This stops the TC642B/TC647B device from
falsely sensing a current pulse which is due to the fan
drive device turn-on.
The initial pulse blanker is also implemented to stop
false sensing of fan current pulses. When a fan is in a
locked rotor condition, the fan current no longer com-
mutates, it simply flows through one fan winding and is
a DC current. When a fan is in a locked rotor condition
and the TC642B/TC647B device is in PWM mode, it
will see one current pulse each time the VOUT output is
turned on. The initial pulse blanker allows the TC642B/
TC647B device to ignore this pulse and recognize that
the fan is in a fault condition.
4.9
Behavioral Algorithms
The behavioral algorithm for the TC642B/TC647B
devices is shown in Figure 4-9.
The behavioral algorithm shows the step-by-step deci-
sion-making process for the fan speed controller oper-
ation. The TC642B and TC647B devices are very
similar with one exception: the TC647B device does
not implement the over-temperature portion of the
algorithm.
RISO
RSENSE
CSENSE
(0.1 F typical)
SENSE
VOUT
TC64XB
GND
FAN
相关PDF资料 |
PDF描述 |
|---|---|
| TC647BEUA | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC642BEOA | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC647EOATR | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC647VUATR | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC647VOART | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC642BEOAG | 制造商:Microchip Technology 功能描述:Fan Control Demo Board |
| TC642BEOATR | 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 |
| TC642BEPA | 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 |
| TC642BEPA713 | 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 |
| TC642BEPATR | 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 |
发布紧急采购，3分钟左右您将得到回复。