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參數(shù)資料
| 型號(hào)： | ML4426 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Bi-directional Sensorless BLDC Motor Controller(雙向無傳感無刷直流電機(jī)控制器) |
| 中文描述： | 雙向傳感器無刷直流電機(jī)控制器（雙向無傳感無刷直流電機(jī)控制器） |
| 文件頁數(shù)： | 8/16頁 |
| 文件大小： | 1089K |
| 代理商： | ML4426 |
ML4426
OUTPUTS
LC
OFF
ON
ON
OFF
OFF
OFF
OFF
INPUT
SAMPLING
N/A
FB B
FB A
FB C
FB B
FB A
FB C
STATE
R
A
B
C
D
E
F
LA
OFF
OFF
OFF
ON
ON
OFF
OFF
LB
ON
OFF
OFF
OFF
OFF
ON
ON
HA
ON
ON
OFF
OFF
OFF
OFF
ON
HB
OFF
OFF
ON
ON
OFF
OFF
OFF
HC
ON
OFF
OFF
OFF
ON
ON
OFF
Table 1. Commutation State Functions (Forward Direction)
Figure 4. Output Commutation Sequence Timing Diagram (Forward Direction)
Cycle 1 - Full Commutation, Cycle 2 - Commutation with 50% PWM Duty Cycle
HIGH
SIDE
DRIVE
OUTPUTS
HA
HB
HC
LOW
SIDE
DRIVE
OUTPUTS
LA
A
B
C
D
E
F
A
B
C
D
E
F
LB
LC
Voltage Controlled Oscillator (VCO)
The VCO provides a TTL compatible clock output on the
VCO/TACH pin proportional to the VCO input voltage at
the SPEED FB pin. The proportion of frequency to voltage
(VCO constant, K
v
) is set by an 80.6k
W
resistor on R
VCO
and a capacitor on C
VCO
as shown in Figure 5. R
VCO
sets
up a current proportional the VCO input voltage at SPEED
FB. This current is used to charge and discharge C
VCO
between the threshold voltages of 2.3V and 4.3V. The
resulting triangle wave on C
VCO
corresponds to the clock
on VCO. K
v
should be set so that the VCO output
frequency corresponds to the maximum commutation
frequency or maximum motor speed when the VCO input
is equal to or slightly less than V
REF
. C
VCO
is calculated
using the following equation:
C
V
Hz Farad
V
Hz
RPM
N SPEED
VCO
MAX
=
-
65
.
3101 10
.
005
.
6
(2)
The closest standard value that is equal to or less than the
calculated C
VCO
should be used.
FUNCTIONAL DESCRIPTION
(Continued)
REV. 1.0 10/10/2000
8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4426 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4426CH | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Bi-directional Sensorless BLDC Motor Controller |
| ML4426CP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Bi-directional Sensorless BLDC Motor Controller |
| ML4426CS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML4426IH | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Bi-directional Sensorless BLDC Motor Controller |
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