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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)： | 1/14頁 |
| 文件大?。?/td> | 241K |
| 代理商： | ML4411A |
May 1997
ML4411
*
/ML4411A
**
Sensorless Spindle Motor Controller
The ML4411A includes a comparator on the P3 output to
prevent cross-conduction.
FEATURES
I
Back-EMF commutation provides maximum torque
for minimum “spin-up” time for spindle motors
Accurate, jitter-free phase locked motor speed
feedback output
I
I
Linear or PWM motor current control
Easy microcontroller interface for optimized start-up
sequencing and speed control
Power fail detect circuit with delayed braking
I
I
I
Drives external N-channel FETs and P-channel FETs
Back-EMF comparator detects motor rotation after
power fail for fast re-lock after brownout
I
* This Product Is Obsolete
** This Product Is End Of Life As Of August 1, 2000
GENERAL DESCRIPTION
The ML4411 provides complete commutation for delta or
wye wound Brushless DC (BLDC) motors without the need
for signals from Hall Effect Sensors. This IC senses the
back EMF of the three motor windings (no neutral
required) to determine the proper commutation phase
angle using Phase Lock Loop techniques. This technique
will commutate virtually any 3-phase BLDC motor and is
insensitive to PWM noise and motor snubbing. The
ML4411 is architecturally similar to the ML4410 but with
improved braking and brown-out recovery circuitry.
Included in the ML4411 is the circuitry necessary for a
Hard Disk Drive microcontroller driven control loop.
The ML4411 controls motor current with either a constant
off-time PWM or linear current control driven by the
microcontroller. Braking and Power Fail are also included
in the ML4411.
The timing of the start-up sequencing is determined by the
micro, allowing the system to be optimized for a wide
range of motors and inertial loads.
The ML4411 modulates the gates of external N-Channel
power MOSFETs to regulate the motor current. The IC
drives P-Channel MOSFETs directly.
BLOCK DIAGRAM
BLDC
MOTOR
POWER
DRIVERS
GATE
DRIVE
LOGIC
AND
CONTROL
BACK-EMF
SAMPLER
VCO
LINEAR OR PWM
CURRENT CONTROL
POWER
FAIL
DETECT
RC
C
VCO
VCO/TACH OUT
RESET
ENABLE E/A
BRAKE
DIS PWR
I
CMD
I
LIMIT
PWR FAIL
+5
VCC
GND
C
OTA
C
OS
I
SENSE
C
BRK
3
N1-3
3
P1-3
VCC2
PH3
PH2
PH1
6
PATENTED
I
RAMP
20
14
15
16
21
18
26
8
28
27
17
19
25
22
23
24
4
7
12
13
6
1
REV. 1.0 10/10/2000
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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