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參數(shù)資料
| 型號(hào)： | A8902 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Three-Phase Brushless DC Motor Controller/ Driver(用于5V或12V硬盤驅(qū)動(dòng)器的三相無刷直流電機(jī)控制器/驅(qū)動(dòng)器) |
| 中文描述： | 三相無刷直流電動(dòng)機(jī)控制器/驅(qū)動(dòng)器（用于5V的或12V的硬盤驅(qū)動(dòng)器的三相無刷直流電機(jī)控制器/驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 10/12頁 |
| 文件大小： | 156K |
| 代理商： | A8902 |
8902–A
3-PHASE BRUSHLESS DC
MOTOR CONTROLLER/DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Dwg. EP-036C
SECTOR
DATA
CHIP SELECT
+5 V
VRET
CWD
CD2
CD1
RESET
CLOCK
DATA IN
VBB
CST
RES
0.22
μ
F
C
CF2
RF1
CF1
BYPASS
BYPASS
1
2
3
4
5
6
7
8
9
9
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
DD
V
BB
V
S
FLL
MUX
COMMUTATION
DELAY
BOOST
CHARGE
PUMP
OSC (REF)
DATA OUT
FAULT
RB
CB
TYPICAL APPLICATION
BRAKE
FAULT
VBRK
VFAULT D
–
V
BRAKE
ACTIVATED
Dwg. OP-004
RB
CB
t BRK
Braking.
A dynamic braking feature of the A8902CLBA shorts the
three motor windings to ground. This is accomplished by turning the
three source drivers OFF and the three sink drivers ON. Activation of
the brake can be implemented through the BRAKE input or through
the D2 bit in the serial port. The supply voltage for the brake circuitry
is the C
RES
voltage, allowing the brake function to remain active after
power failure. Power-down braking with delay can be implemented by
using an external RC and other components to control the brake
terminal, as shown. Brake delay can be set using the equation below
to ensure that voice-coil head retract occurs before the spindle motor
V
BRK
V
FAULT -
V
D
brake is activated. Once the brake is acti-
vated, due to the inherent capacitive input,
the three sink drivers will remain active until
the device is reset.
t
BRK
= R
B
C
B
1
–
l
n
Centertap.
The A8902CLBA internally
simulates the centertap voltage of the motor.
To obtain reliable start-up performance from
motor to motor, the motor centertap should be
connected to this terminal.
External Component Selection.
Appli-
cations information regarding the selection of
external component values is available from
the factory for external component selection,
frequency-locked loop speed control, and
commutation delay capacitor selection.
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PDF描述 |
|---|---|
| A8904SLB | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| A8904SLB-T | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| A8904SLP | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| A8904SLP-T | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| A8904 | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A8902CLBA | 制造商:Allegro MicroSystems LLC 功能描述:DC Motor Driver 24-Pin SOIC(300mil) |
| A8902CLBAJ | 制造商:Allegro MicroSystems LLC 功能描述:2CLBAJ |
| A8902SLB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| A8903SLB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| A8904 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
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