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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(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 164K |
| 代理商： | A8932 |
8932-A
VOICE-COIL MOTOR DRIVER
www.allegromicro.com
Term.
Terminal Name
Function
1
RET REF
The reference supply for setting the voltage across the load during retract.
2
V
FLT
Reservoir (energy storage) capacitor used to operate fault circuitry.
3
V
BEMF
Back-EMF voltage from spindle motor used to retract heads during loss of power.
4
GROUND
Circuit reference.
5
UV
SET
Under-voltage trip point reference input. Set internally to 4.2 V but may be overridden by
external resistor divider. (Equation 4).
6
R
OUT P
Source driver used for retract; externally connected to OUT
P
.
7
OUT
Output of uncommitted operational amplifier.
8
SWITCH
Logic input for transmission gate; a high level connects OUT to OUT
SW
.
9
IN
N
Inverting input to uncommitted operational amplifier.
10
OUT
SW
Transmission-gated output of uncommitted operational amplifier.
11
RETRACT
An active-low logic input that initiates the retract sequence.
12
FAULT
A logic low at this MOS output indicates a thermal shutdown, under-voltage fault, or retract
command.
13
MP
RESET
(Power-On Reset) A logic low at this open-collector output may be used to reset the
system on under-voltage fault or power on.
14
SIGNAL SUPPLY
V
CC
; low-current supply voltage in the range of 4.5 V to 5.5 V.
15
ACT
Input which controls the current in the load. Transconductance gain is set with an external
resistor in series with this input (Equation 1).
16
REFERENCE
V
REF
; reference input for all amplifiers; ac ground.
17
H GAIN
Logic input to switch the error amplifier transconductance gain: LOW = 2000,
HIGH = 8000.
18
PWR OFF
An active-high logic input that puts the device in a
“
sleep mode
”
.
All fault circuitry remains active.
19
ACT
FB
Input connection for feedback network which sets the error amplifier gain and bandwidth.
20
SGND
P
Power ground for the OUT
P
sink driver.
21
OUT
N
Power output. Sinks current when V
ACT
< V
REF
.
22
LOAD SUPPLY
V
DD
; high-current supply voltage for the voice-coil motor.
23
OUT
P
Power output. Sinks current when V
ACT
> V
REF
.
24
SGND
N
Power ground for the OUT
N
sink driver.
25
V
SENS FB
Input connection for feedback network which sets the current-sense amplifier gain and
bandwidth. Also called gm SET.
26
V
LOAD
An output voltage proportional to the load voltage. Used in conjunction with closed-loop
velocity control.
27
V
SENS
Voltage output representing load current (Equation 2). Also called MONITOR.
28
RET SET
An external resistor divider to set the retract voltage across the load. Used in conjunction
with V
RET-REF
(Equation 3).
TERMINAL FUNCTIONS
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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