- 您现在的位置：买卖IC网 > PDF目录98171 > TC665EUN BRUSHLESS DC MOTOR CONTROLLER, PDSO10 PDF资料下载
参数资料
| 型号： | TC665EUN |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO10 |
| 封装： | PLASTIC, MSOP-10 |
| 文件页数： | 5/36页 |
| 文件大小： | 695K |
| 代理商： | TC665EUN |
第1页第2页第3页第4页当前第5页第6页第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页第35页第36页
2002 Microchip Technology Inc.
DS21737A-page 13
TC664/TC665
See Section 7.4 for more details on selecting the
appropriate current sense resistor and coupling
capacitor values.
FIGURE 4-7:
Fan Current Sensing.
By selecting FPPR (bits 2-1<01>) in the Configuration
Register, the TC664/TC665 devices can be pro-
grammed to calculate RPM data for fans with 1, 2, 4 or
8 current pulses per rotation. The default state
assumes a fan with 2 pulses per rotation.
The measured RPM data is then stored in the RPM-
OUTPUT (RPM) Register. This register is a 9-Bit read
only register which stores RPM data with 25 RPM res-
olution. By setting RES (bit 6<0>) of the Configuration
Register to a ‘1’, the RPM data can be read with
25 RPM resolution. If this bit is left in the default state
of '0', the RPM data will only be readable with resolu-
tion of 50 RPMs, which represents 8-bit data.
The maximum fan RPM reading is 12775 RPM. If this
value is exceeded, a counter overflow bit in the Status
Register is set. RCO (bit 3<0>) in the Status Register
represents the RPM counter overflow bit for the RPM-
OUTPUT Register. This bit will automatically be reset
to zero if the fan RPM reading has been below the max-
imum value of 12775 RPM for 2.4 seconds.
See Table 6-1 for RPM and Status Register command
byte assignments.
4.8
Fan Fault Threshold and
Indication (FAULT)
For the TC664/TC665 devices, a fault condition exists
whenever a fan’s sensed RPM level falls below the
user programmable threshold. The RPM threshold
value for fan fault detection is set in the FAN_FAULT
Register (8-bit, read/write).
The RPM threshold represents the fan speed at which
the TC664/TC665 devices will indicate a fan fault. This
threshold can be set at lower levels to indicate fan
locked rotor conditions, or set to higher levels to give
indications for predictive fan failure. It is recommended
that the RPM threshold be at least 10% lower than the
minimum fan speed which occurs at the lowest duty
cycle set point. The default value for the fan RPM
threshold is 500 RPM. If the fan's sensed RPM is less
than the fan fault threshold for 2.4 seconds (typical), a
fan fault condition is indicated.
When a fault condition, due to low fan RPM, occurs, a
logic low is asserted at the FAULT output and the FF
(bit 0<0>) in the Status Register is set to '1'. The FAULT
output and the fault bit in the Status Register can be
reset by setting FFCLR (bit 7<0>) in the Configuration
Register to a '1'.
For the TC665 device, a fault condition is also indicated
when an Over Temperature Fault condition occurs.
This condition occurs when the VOUT duty cycle
exceeds the 100% value, indicating that no additional
cooling capability is available. For this condition, a logic
low is asserted at the FAULT output and OTF (bit 5<X>)
of the Status Register, the over temperature fault indi-
cator, is set to a ‘1’ (The TC664 also indicates an over
temperature condition via the OTF bit in the status reg-
ister). If the duty cycle then decreases below 100%, the
FAULT output will be released and OTF (bit 5<X>) of
the Status Register will be reset to ‘0’.
4.9
Low Power Shutdown Mode
Some applications may have operating conditions
where fan cooling is not required as a result of low
ambient temperature or light system load. During these
times it may be desirable to shut the fans down to save
power and reduce system noise.
The TC664/TC665 devices can be put into a low power
shutdown mode by setting SDM (bit 0<0>) in the Con-
figuration Register to a ‘1’ (this bit is the shutdown bit).
When the TC664/TC665 devices are in shutdown
mode, all functions except for the SMBus interface are
suspended. During this mode of operation, the TC664
and TC665 devices will draw a typical supply current of
only 5 A. Normal operation will resume as soon as Bit
0 in the Configuration Register is reset to ‘0’.
When the TC664/TC665 devices are brought out of a
shutdown mode by resetting SDM (bit 0<0>) in the
Configuration Register, all of the registers, except for
the Configuration and FAN_FAULT Registers assume
SENSE
VOUT
FAN
RISO
RSENSE
CSENSE
TC664
TC665
GND
相关PDF资料 |
PDF描述 |
|---|---|
| TC7106ARCPLIJL | 1-CH DUAL-SLOPE ADC, ACCESS, PDIP40 |
| TC7106CPLIJL | 1-CH DUAL-SLOPE ADC, ACCESS, PDIP40 |
| TC7107ARCPLIJL | 1-CH DUAL-SLOPE ADC, ACCESS, PDIP40 |
| TC7106ACPLIJL | 1-CH DUAL-SLOPE ADC, PDIP40 |
| TC7106CPLIJL | 1-CH DUAL-SLOPE ADC, PDIP40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC665EUNTR | 功能描述:马达/运动/点火控制器和驱动器 Single 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 |
| TC67 | 功能描述:铝质电解电容器 - 带引线 40uF 350V RoHS:否 制造商:Kemet 引线类型: 电容:220 uF 容差:20 % 电压额定值:25 V 工作温度范围: 端接类型:Radial 外壳直径:8 mm 外壳长度:11 mm 引线间隔:5 mm 产品:General Purpose Electrolytic Capacitors 封装:Bulk |
| TC670 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
| TC670_03 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
| TC670_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
发布紧急采购，3分钟左右您将得到回复。