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參數(shù)資料
| 型號： | ML4411A |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Sensorless Spindle Motor Controller(無傳感器主軸電機(jī)控制器) |
| 中文描述： | 傳感器主軸電機(jī)控制器（無傳感器主軸電機(jī)控制器） |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 241K |
| 代理商： | ML4411A |
ML4411/ML4411A
10
REV. 1.0 10/10/2000
APPLICATIONS
Figure 10 shows a typical application of the ML4411 in a
hard disk drive spindle control. Although the timing
necessary to start the motor in most applications would be
generated by a microcontroller, Fig. 11 shows a simple
“one shot” start-up timing approach.
Speed control can be accomplished either by:
1. Sensing the VCO OUT frequency with a
Microcontroller and adjusting I
CMD
via an analog
output form the Micro (PWM DAC).
2. Using analog circuitry for speed control. (Fig. 12).
OUTPUT STAGE HINTS
In the circuit in Figure 10, Q1, Q2, and Q3 are IRFR9024
or equivalent. Q4, Q5, and Q6 are IRFR024 or equivalent.
New MOSFET packaging technology such as the Little
Foot
series may decrease the PC board space. These
packages, however have much lower thermal inertia and
dissipation capabilities than the larger packages, and care
should be taken not to exceed their rated current and
junction temperature.
Since the output section in a full bridge application
consists of three half-H switches, cross-conduction can
occur. Cross-conduction is the condition where an N-FET
and P-FET in the same phase of the bridge conduct
simultaneously. This could happen under two conditions
(see figure 13):
I
CMD
I
LIMIT
BRAKE
VCC
PH3
PH2
PH1
I
RAMP
RC
+5V
ENABLE E/A
PWR FAIL
RESET
VCO/TACH OUT
GND
P1
P2
VCC2
P3
C
OTA
C
BRK
DIS PWR
N1
N2
N3
I
SENSE
C
OS
C
VCO
I
COMMAND
+5
1M
+12
+5
510K
0.22
+5
5K
5K
0.5
Q6
Q3
0.1
10
Q2
Q5
Q1
Q4
VCC2
1N5819
0.1
10
+12V
TO VCC
510
0.01
0.22
0.02
0.01
ENABLE ERROR AMP
RESET (FROM MICRO)
POWER FAIL TO MICRO
VCO OUT
DISABLE POWER
100pF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+12
510
510
1K
1K
1K
Figure 10. ML4411 Typical Application
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4411 | Sensorless Spindle Motor Controller(無傳感器主軸電機(jī)控制器) |
| ML4423 | 1, 2, or 3-Phase Variable Speed AC Motor Controller(一、二或三相可變速交流電機(jī)控制器) |
| ML4425 | Sensorless BLDC Motor Controller |
| ML4425CP | Sensorless BLDC Motor Controller |
| ML4425CS | Sensorless BLDC Motor Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4411ACS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML4411CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Sensorless Spindle Motor Controller |
| ML44126N | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:FOR OPTICAL INFORMATION SYSTEMS |
| ML44126R | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:FOR OPTICAL INFORMATION SYSTEMS |
| ML4420 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:ENHANCED SENSORLESS BLDC MOTOR CONTROLLER |
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