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參數(shù)資料
| 型號(hào)： | FAN8461G |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Single Phase Full Wave BLDC Motor Driver |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, PDSO10 |
| 封裝： | 0.225 INCH, SSOP-10 |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 301K |
| 代理商： | FAN8461G |
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FAN8461G
7
Application Information
1. H-bridge motor driver(OUT1, OUT2)
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
motor while switching occuers.
2. Locked Rotor Protection with Open Collector Output and Automatic Restart
When the rotor is locked, there is no change in input signal of hall amplifier and thus a internal T
ZERO
pulse is not observed.
A capacitor(C
LD
) connectied LD pin is continually charged by internal current source(I
LDC
) to internal threshold (V
LDCL
)
resulting from no Tzero pulse. When the voltage,V
CLD on
LD pin, reaches V
LDCL
, high side output power TR is turned-off to
protect motor during T
OFF
and the alarm output (AL) becomes floating high. When the V
CLD
reaches upper thresh-
old,V
LDCL
, V
CLD
starts to decrease with internal current sink(I
LDD
) to the low threshold, VLDCP. At that time, the V
CLD
ramps up again and one of two outputs is turned on depending on locked rotor position during T
ON
.The charging and dis-
charging repeat until locked conditon is removed, or FAN8461G is powerd down. The overall time chart is shown in figure.1.
The auto- retry time(T
ON
), the motor protection time(T
OFF
), the locked rotor detection time(T
LOCK
) are proportional to
external capacitor, C
LD
and each value can be calculated as follows;
For example, C
LD
= 0.33uF, then T
ON=
0.3Sec,T
OFF=
2Sec,T
LOCK=
0.4Sec. This AL output can be used to inform a locked
rotor condition to super IO or system controller. Because the AL output is open collector type, end user can pull up this pin
with a external resistor to the supply voltage of their choice(that is 5 or 3.3V). It is recommednd that this AL output be higher
than the GND potential.
TON
------------------------------------------–
ILDC
)
=
TOFF
------------------------------------------–
ILDD
)
=
T
LOCK
CLD
---------------------------
VLDCL
I
LDC
×
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN8463 | Terminal Block |
| FAN8463MPX | BTL Single Phase Full Wave BLDC Motor Driver |
| FAN8463MTC | BTL Single Phase Full Wave BLDC Motor Driver |
| FAN8463MTCX | BTL Single Phase Full Wave BLDC Motor Driver |
| FAN8486D | 2-Phase BLDC Motor Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| FAN8463MTC | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:BTL Single Phase Full Wave BLDC Motor Driver |
| FAN8463MTCX | 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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