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參數資料
| 型號： | FAN8460MPX |
| 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, DSO14 |
| 封裝： | 4 X 4 MM, MLP-8 |
| 文件頁數： | 9/22頁 |
| 文件大?。?/td> | 433K |
| 代理商： | FAN8460MPX |
FAN8460MTC/FAN8460MP
9
Application Information
1 Direct output PWM for FAN Motor Speed Control
Direct output PWM method is used to control driving power to a fan motor and thus fan motor speed. A motor current, and
thus fan motor speed is proportional to duty-cycle of output PWM signal in FAN8460MTC/FAN8460MP. The internal PWM
signal is driven by comparing a triangle wave (PWM oscillator output, V
CT
) and a control DC voltage V
VCON
). Figure.1
illustrates the relationships among oscillator output (V
CT
), speed control voltage (V
VCON
), motor current, and output PWM
duty.
Figure 1. Basic Speed Control Concept
.
Figure 2. The Relationship Between Speed Control Voltage and Output PWM Duty
As shown in figure2, the output PWM duty-cycle can be decreased as V
VCON
is increased. The effective range of speed con-
trol voltage (V
VCON
) is 0.8 ~1.8V(typical) which represents a duty-cycle range of 0% to 100% on PWM signal.When
V
VCON
is 1.3V, the output PWM duty becomes 50%.
2 H-bridge motor driver (OUTA, OUTB)
Using an H-bridge to drive a single-phase BLDC motor provides several advantages for DC fans over a two phase motor com-
monly driven by two commutated low-side switches. A single phase motor has only two connections; hence, the H-bridge
topology requires only two output terminals and two traces are needed on the fan PCB. Generally, this H-bridge method with
single phase motor increases fan motor torque density over a typical unipolar drive method. In addition, the H-bridge topology
eliminates the number of external component for snubbing and allows recirculation of winding current to maintain energy in a
t
PWM
t
ON
t
OFF
V
CT
V
VCON
i
M
High Speed
Low Speed
Mid Speed
V
VCON
V
CT
i
M(avg)
i
M
i
freewheeling
0.8V
1.8V
PWM
Speed Control Voltage(V
VCON
)
50%
100%
0
0.8V
1.8V
1.3V
Output PWM(Duty)
2V
相關PDF資料 |
PDF描述 |
|---|---|
| FAN8460MTC | Single Phase Full Wave BLDC Motor Driver with Variable Speed Control |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN8460MTC | 制造商:FAIRCHILD 制造商全稱: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 |
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