參數(shù)資料
型號(hào)： A8932
廠商： Allegro MicroSystems, Inc.
英文描述： Voice-Coil Motor Driver(音頻線圈電機(jī)驅(qū)動(dòng)器)
中文描述： 語音線圈電動(dòng)機(jī)驅(qū)動(dòng)器（音頻線圈電機(jī)驅(qū)動(dòng)器）
文件頁數(shù)： 1/8頁
文件大?。?/td> 164K
代理商： A8932
Providing control and drive of the voice-coil motor used for head
positioning in 5 V disk drive applications, the second-generation
A8932CLWA is a full-bridge driver that can be configured so that its
output current is a direct function of an externally applied control
voltage or current. This linear current control function is supplemented
by additional circuitry to protect the heads and the data disk during
system failure or normal system shutdown.
The two
±
500 mA MOS driver outputs provide very low saturation
voltage and minimal power dissipation. Additional headroom is
achieved by the sense-FET structure eliminating the need for an exter-
nal current-sense resistor. Internal circuitry can be configured to
provide closed-loop velocity control of the actuator by utilizing the
generated back-EMF of the voice-coil motor. Thermal protection and
under-voltage lockout disables the system in a controlled sequence if a
fault condition occurs.
VOICE-COIL MOTOR DRIVER
FEATURES
I
Class-B, 2
r
DS(on)
at 500 mA Output
I
Lossless Current Sensing
I
Zero Current-Loop Deadband
I
High Transconductance Bandwidth
I
User-Adjustable Transconductance Gain
I
Digital Transconductance Gain Switch (4:1 Ratio)
I
5 Volt Monitor with Selectable UV Trip Point
I
Retract Circuitry Functional to 0 Volts
I
Sleep Mode Function
I
Internal Back-EMF Velocity Loop Option
I
Internal Thermal Shutdown Circuitry
D
2
Always order by complete part number, e.g.,
A8932CLWA
.
ABSOLUTE MAXIMUM RATINGS
Supply Voltages, V
CC
and V
DD
............
6.0 V
Output Current, I
OUT
(peak)...........
±
600 mA
(continuous) ...........................
±
500 mA
Analog Input Voltage Range,
V
IN
....................................
-0.3 V to V
CC
Logic Input Voltage Range,
V
IN
...............................
-0.3 V to +6.0 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.
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RET SET
LOAD
SUPPLY
ACT
REFERENCE
H GAIN
PWR OFF
RET REF
GROUND
SWITCH
OUT
SIGNAL
SUPPLY
OUT
SW
IN
N
R
OUT P
UV
SET
V
BEMF
V
FLT
CC
V
V
SENS
V
LOAD
V
SENS FB
SGND
N
OUT
P
OUT
N
V
DD
SGND
P
ACT
FB
RETRACT
FAULT
MP
RESET
2 V
–
+
–
+
+
–
–
+
V
REF
PROTECT
CIRCUIT
PROTECT
CIRCUIT
8932-A
相關(guān)PDF資料
PDF描述
A8936CJT VOICE COIL MOTOR DRIVER
A8936CLW VOICE COIL MOTOR DRIVER
A8958 Voice-Coil Motor Driver(音頻線圈電機(jī)驅(qū)動(dòng)器)
A8983CJT Switches; Leaded Process Compatible:Yes
A92 TRANSISTOR（ PNP ）
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A8932CLW 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Servo Motor Controller/Driver
A8932CLWA 制造商:Allegro MicroSystems LLC 功能描述:Voice Coil Motor Driver 5V 28-Pin SMD 制造商:Allegro MicroSystems 功能描述:Voice Coil Motor Driver 5V 28-Pin SMD
A8932CLWATR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC
A8936CJT 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:VOICE COIL MOTOR DRIVER
A8936CLW 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:VOICE COIL MOTOR DRIVER
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