- 您现在的位置：买卖IC网 > PDF目录68994 > FAN8460MP (FAIRCHILD SEMICONDUCTOR CORP) BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, DSO14 PDF资料下载
参数资料
| 型号： | FAN8460MP |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, DSO14 |
| 封装： | 4 X 4 MM, MLP-8 |
| 文件页数： | 3/22页 |
| 文件大小： | 499K |
| 代理商： | FAN8460MP |
FAN8460MTC/FAN8460MP
11
Figure 4. Sensed temperature and speed control voltage
4.2 PWM Speed Control using Internal Oscillator(Scheme 2)
A digital PWM input applied to VPWM pin is converted to analog DC voltage by PWM decoder and external RC filter. The
external filter capacitor, CPWM, eliminates high frequency AC component in VVCON. If a large value of CPWM is used,
VVCON has smaller value of AC component (ripple), but larger time delay can be occurred in VVCON with some fixed input
frequency. The lower frequency of digital PWM input needs the larger value of CPWM. External resistor RPWM, RPWM
define the VVCON range as follow;
Figure 5. The Relationship Digital PWM Input Duty VS VVCON and Output PWM Duty
For example, RPWM =6.2K and ROPT =120K, VVCON become between 0.72V and 1.9V, because VVREF=2V, IVOCN =
200uA. For some design margin, under the 8% duty of digital PWM input, fan motor stops because the output PWM duty is 0.
If the duty of digital PWM input is lager than 0.92, then output PWM duty is 100%. It means fan motor is operated in full
speed. Figure5.a shows the relationship between digital PWM input and active filter out (VVCON) and figure5.b illustrates the
0
4
8
12
16
20
24
28
32
36
40
0
10203040 5060708090 100
temperature[°C]
10K
NT
C[
K
ohm
]
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
V
CO
N
volta
g
e
[
V
]
10KohmNTC
VCONvoltage
0
4
8
12
16
20
24
28
32
36
40
0 10 20 30 40 50 60 70 80 90
10
0
temperature[°C]
10K
NTC[Kohm
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
VCON
volta
g
e[
V
]
10KNTC
Equivalent Resistance
VCONvoltage
VVCON ON
()
VREF
RPWM IVCON
×
()
–
{}
ROPT
ROPT RPWM
+
--------------------------------
×
=
VVCON OFF
()
VVREF ROPT RPWM ROPT
+
()
×
=
Digital VPWM Input Duty
50%
100%
0
Output PWM(Duty)
100%
0%
8%
88%
50%
Digital VPWM Input Duty
50%
100%
0
0.72V
1.9V
VVCON(V)
8%
92%
0.8V
1.8V
相关PDF资料 |
PDF描述 |
|---|---|
| FAN9611MX | 2.5 A POWER FACTOR CONTROLLER, 630 kHz SWITCHING FREQ-MAX, PDSO16 |
| FB6831J | 0.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| FC050B | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| FC050B9 | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| FC100B9 | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN8460MPX | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN8460MTC | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Single Phase Full Wave BLDC Motor Driver with Variable Speed Control |
| FAN8460MTCX | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN8461G | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Single Phase Full Wave BLDC Motor Driver |
| FAN8461GX | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Single Phase Full Wave BLDC Motor Driver |
发布紧急采购，3分钟左右您将得到回复。