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參數(shù)資料
| 型號： | SI9961 |
| 廠商： | Vishay Intertechnology,Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 12-V Voice Coil Motor Driver |
| 中文描述： | 12 V的音圈電機(jī)驅(qū)動器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 69K |
| 代理商： | SI9961 |
Si9961
Vishay Siliconix
Document Number: 70014
S-20883
—
Rev. G, 24-Jun-02
www.vishay.com
5
A3
A4
Q3
Q4
Q1
Q2
A5
A2
OA2
IA2
–
FAULT
RETRACT
I
RET
R
RET
R
INH
1
R
INL
2
V
DD
V+
EXT
V
REF
V
REF
–
V
R
OUTPUT
A
19
I
SENSE
I
SENSE
+
–
Retract
Control
–
+
Voltage
Monitor
–
+
12 V
System
Supply
VCM
GND
V
R
R
FB
24
GAIN
SELECT
I
SENSE
A
B
Acceleration Error
V
R
–
+
V
R
V
IN
R3
R4
R5
R
SA
R
SB
R
L
C
L
R2
C2
OUTPUT
B
Back EMF Supply
R
7 R
R
8 R
mP
mP
5-V Ref
V
CC
5 V
ENABLE
8
18
7
12
17
20
16
14
15
21
13
3
10
22
11
6
9
23
5
4
I
OUT
FIGURE 1.
Si9961 Typical Application
Head Retract
A low on the RETRACT input pin turns output devices Q1 and
Q4 on, and output devices Q2 and Q3 off. Maximum VCM
current can be set during head retract by adding an external
resistor between the IRET pin and ground. Maximum retract
current may be calculated as:
I
OUT
175 x I
ret
175 x
0.66 V
R
ret
Head retract can be initiated automatically by an undervoltage
condition (either the 12-V or 5-V supplies on the Si9961) by
connecting the FAULT output to the RETRACT input.
A high ENABLE input puts both driver outputs in a
high-impedance state. The ENABLE function can be used to
eliminate quiescent output current when power is applied but
the head has been parked, such as a sleep mode. A
sleep-mode power down sequence should be preceded by a
retract signal since a power failure during this state may not
provide adequate spindle-motor back EMF to permit head
retraction.
Transconductance Amplifier Compensation
The Si9961CY features an integrated transconductance
amplifier to drive the voice coil motor (VCM). To ensure proper
operation, this amplifier must be compensated specifically for
the VCM being driven. As a first approximation, the torque
constant and inertia of the VCM may be ignored, although they
will have some influence on the final results, especially if large
values are involved. (See Figure 1.)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9961A | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:12-V Voice Coil Motor Driver |
| SI9961ACY | 功能描述:馬達(dá)/運(yùn)動/點火控制器和驅(qū)動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| SI9961ACY-E3 | 功能描述:馬達(dá)/運(yùn)動/點火控制器和驅(qū)動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| SI9961ACY-T1 | 功能描述:馬達(dá)/運(yùn)動/點火控制器和驅(qū)動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| SI9961ACY-T1-E3 | 功能描述:馬達(dá)/運(yùn)動/點火控制器和驅(qū)動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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