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參數(shù)資料
| 型號(hào)： | KA3020D |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | 3-Phase BLDC Motor Driver(三相無(wú)刷直流電機(jī)驅(qū)動(dòng)器) |
| 中文描述： | CD MOTOR DRIVER, PDSO28 |
| 封裝： | 0.375 INCH, HSSOP-28 |
| 文件頁(yè)數(shù)： | 10/18頁(yè) |
| 文件大小： | 281K |
| 代理商： | KA3020D |
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FAN8420D (KA3020D); PRELIMINARY
10
4. TSD (THERMAL SHUTDOWN)
When the chip temperature rises above 175
°
C, the Q2 turns on and the output driver shuts down. When the chip temperature
falls off to about 150
°
C, then the Q2 turns off and the driver operates normally. TSD has the temperature hysteresis of about
25
°
C.
5. ROTATIONAL DIRECTION DETECTION
The forward and the reverse rotations of the CD are detected by the D-F/F and the truth table is shown in the above.
The rotational direction of the CD can be explained by the output waveforms of the Hall sensors. The three outputs of Hall
sensors be H1, H2 and H3 respectively.
When the spindle rotates in reverse direction, the Hall sensor output waveforms are shown in Fig.(a). The phases order are
in H1
→
H2
→
H3 with a 120
°
C phase difference.
On the other hand, if the spindle rotates in forward rotation, the phase relationship is H3
→
H2
→
H1 as shown in fig.(b)
Gain
Controller
BIAS
Q2
20
+
+
V
CC
DIR
D-F/F
D
Q
CK
H2+
H3+
H3
H2
Rotation
DIR
Forward
Low
Reverse
High
20
(a) Reverse rotation
H1
H2
H3
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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| KA-3020SGC | 制造商:Kingbright Corporation 功能描述: |
| KA-3020SGT | 制造商:Kingbright Corporation 功能描述: |
| KA-3020SRC | 制造商:Kingbright Corporation 功能描述: |
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