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参数资料
| 型号： | 8906 |
| 厂商： | Allegro MicroSystems, Inc. |
| 英文描述： | BIDIRECTIONAL 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| 中文描述： | 双向三相无刷直流电机控制器/返回驱动程序，电磁场遥感 |
| 文件页数： | 1/12页 |
| 文件大小： | 159K |
| 代理商： | 8906 |
Dwg. PP-040B
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
°
C
Load Supply Voltage, V
BB
. . . . . . . . . .
14 V
Output Current, I
OUT
. . . . . . . . . . . .
±
1.25 A
Logic Supply Voltage, V
DD
. . . . . . . . .
6.0 V
Logic Input Voltage Range,
V
IN
. . . . . . . . . . .
-0.3 V to V
DD
+ 0.3 V
Package Power Dissipation, P
D
See Graph
Operating Temperature Range,
T
A
. . . . . . . . . . . . . . . . . .
0
°
C to +70
°
C
Junction Temperature, T
J
. . . . . . .
+150
°
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . .
-55
°
C to +150
°
C
Fault conditions that produce excessive junction
temperature will activate device thermal shutdown
circuitry. These conditions can be tolerated, but
should be avoided.
Output current rating may be restricted to a value
determined by system concerns and factors.
These include: system duty cycle and timing,
ambient temperature, and use of any heatsinking
and/or forced cooling. For reliable operation, the
specified maximum junction temperature should
not be exceeded.
Always order by complete part number, e.g.,
A8906CLB
.
D
2
The A8906CLB is a bidirectional three-phase brushless dc motor
controller/driver. The three half-bridge outputs are low on-resistance n-
channel DMOS devices capable of driving up to 1 A. The A8906CLB
provides complete, reliable, self-contained back-EMF sensing motor
startup and running algorithms. A programmable digital frequency-
locked loop speed control circuit together with the linear current control
circuitry provides precise motor speed regulation.
A serial port allows the user to program various features and
modes of operation, such as the speed control parameters, rotational
direction, startup current limit, sleep mode, diagnostic modes, and
others.
The A8906CLB is fabricated in Allegro’s BCD (Bipolar CMOS
DMOS) process, an advanced mixed-signal technology that combines
bipolar, analog and digital CMOS, and DMOS power devices. The
A8906CLB is provided in a 24-lead wide-body SOIC batwing package.
It provides for the smallest possible construction in surface-mount
applications.
FEATURES
I
DMOS Outputs
I
Low
r
DS(on)
I
Startup Commutation Circuitry
I
Back-EMF Commutation Circuitry
I
Direction Control
I
Serial Port Interface
I
Frequency-Locked Loop Speed Control
I
Sector Data Tachometer Signal Input
I
Programmable Start-Up Current
I
Diagnostics Mode
I
Sleep Mode
I
Linear Current Control
I
Internal Current Sensing
I
Dynamic Braking Through Serial Port
I
Power-Down Dynamic Braking
I
System Diagnostics Data Out
I
Data Out Ported in Real Time
I
Internal Thermal Shutdown Circuitry
BIDIRECTIONAL 3-PHASE BRUSHLESS DC MOTOR
CONTROLLER/DRIVER WITH BACK-EMF SENSING
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
BRAKE
FILTER
DATA IN
LOGIC
SUPPLY
GROUND
CHIP SELECT
CLOCK
RESET
GROUND
GROUND
GROUND
DD
V
CST
OUTA
OUTB
OUTC
CD1
BB
V
LOAD
SUPPLY
CWD
CD2
DATA OUT
SECTOR
DATA
CENTERTAP
OSCILLATOR
CRES
S
FLL
MUX
COMMUTATION
DELAY
BOOST
CHARGE
PUMP
8906
PRELIMINARY INFORMATION
(Subject to change without notice)
March 1, 1999
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|---|---|
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