- 您现在的位置：买卖IC网 > PDF目录384955 > TC642 (Microchip Technology Inc.) PWM Fan Speed Controller with FanSense⑩ Technology PDF资料下载
参数资料
| 型号： | TC642 |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | PWM Fan Speed Controller with FanSense⑩ Technology |
| 中文描述： | 与FanSense PWM风扇速度控制器⑩技术 |
| 文件页数： | 15/28页 |
| 文件大小： | 485K |
| 代理商： | TC642 |
第1页第2页第3页第4页第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页当前第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
2002 Microchip Technology Inc.
DS21444C-page 15
TC642
5.7
Power Supply Routing and
Bypassing
Noise present on the V
IN
and V
MIN
inputs may cause
erroneous operation of the FAULT output. As a result,
these inputs should be bypassed with a 0.01
μ
F
capacitor mounted as close to the package as is possi-
ble. This is particularly true of V
IN
, which is usually
driven from a high impedance source (such as a ther-
mistor). In addition, the V
DD
input should be bypassed
with a 1 μF capacitor. Grounds should be kept as short
as possible. To keep fan noise off the TC642 ground
pin, individual ground returns for the TC642 and the low
side of the fan current sense resistor should be used.
Design Example
Step 1.
Calculate R
1
and R
2
based on using an NTC
having a resistance of 10 k
at T
MIN
(25°C)
and 4.65 k
at T
MAX
(45°C) (see Figure 5-9).
R
1
= 20.5 k
R
2
= 3.83 k
Step 2.
Set minimum fan speed V
MIN
= 1.8V.
Limit the divider current to 100 μA from which
R
5
= 33 k
and R
6
= 18 k
.
Step 3.
Design the output circuit.
Maximum fan motor current = 250 mA.
Q
1
beta is chosen at 50 from which
R
7
= 800
.
FIGURE 5-9:
Design Example.
FAULT
SENSE
NTC
10 k
@ 25C
R
1
20.5 k
R
2
3.83 k
R5
33 k
R
7
800
R
6
18 k
R
8
10 k
GND
Fan
Shutdown
(Optional)
Q
1
Q
2
+12V
+5V
+5V
+5V
V
DD
V
IN
V
MIN
V
OUT
R
SENSE
2.2
C
0.1
μ
F
C
1
1
μ
F
C
F
TC642
Fan
C
B
0.01 μF
C
B
0.01
μ
F
+
C
B
1
μ
F
8
4
6
7
5
2
3
1
Fan/
Thermal Fault
相关PDF资料 |
PDF描述 |
|---|---|
| TC642EV | PWM Fan Speed Controller with FanSense⑩ Technology |
| TC654EUN | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC655EUN | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC654 | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC655 | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC642_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSensea?￠ Technology |
| TC642B | 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 |
| TC642B_13 | 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 FanSensea?￠ Technology for Fault Detection |
| TC642BEOA | 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 |
| TC642BEOA713 | 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 |
发布紧急采购，3分钟左右您将得到回复。