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參數資料
| 型號： | FAN8460MTC |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Single Phase Full Wave BLDC Motor Driver with Variable Speed Control |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, PDSO14 |
| 封裝： | TSSOP-14 |
| 文件頁數： | 11/22頁 |
| 文件大小： | 433K |
| 代理商： | FAN8460MTC |
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, C
PWM
, eliminates high frequency AC component in V
VCON
. If a large value of C
PWM
is used,
V
VCON has
smaller value of AC component (ripple), but larger time delay can be occurred in V
VCON
with some fixed input
frequency. The lower frequency of digital PWM input needs the larger value of C
PWM
. External resistor R
PWM,
R
PWM
define the V
VCON
range as follow;
Figure 5. The Relationship Digital PWM Input Duty VS V
VCON
and Output PWM Duty
For example, R
PWM
=6.2K and R
OPT
=120K, V
VCON
become between 0.72V and 1.9V, because V
VREF
=2V, I
VOCN
=
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 (V
VCON
) and figure5.b illustrates the
0
4
8
12
16
20
24
28
32
36
40
0
10
20
30
40
50
60
70
80
90 100
temperature[°C]
1
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
V
10K ohmNTC
VCONvotage
0
4
8
12
16
20
24
28
32
36
40
0
10
20
30
40
50
60
70
80
90
100
temperature[°C]
1
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
V
10KNTC
Equivaent Resstance
VCON voltage
V
VCON ON
)
V
REF
R
PWM
I
VCON
×
(
)
–
{
}
R
OPT
+
R
OPT
R
PWM
-------------------------------
×
=
V
VCON OFF
)
V
VREF
R
OPT
R
PWM
R
OPT
+
(
)
×
=
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
V
VCON
(V)
8%
92%
0.8V
1.8V
相關PDF資料 |
PDF描述 |
|---|---|
| FAN8460MTCX | Single Phase Full Wave BLDC Motor Driver with Variable Speed Control |
| FAN8461GX | Single Phase Full Wave BLDC Motor Driver |
| FAN8461G | Single Phase Full Wave BLDC Motor Driver |
| FAN8463 | Terminal Block |
| FAN8463MPX | BTL Single Phase Full Wave BLDC Motor Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN8460MTCX | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN8461G | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Single Phase Full Wave BLDC Motor Driver |
| FAN8461GX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Single Phase Full Wave BLDC Motor Driver |
| FAN8463 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:BTL Single Phase Full Wave BLDC Motor Driver |
| FAN8463MPX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:BTL Single Phase Full Wave BLDC Motor Driver |
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