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參數資料
| 型號： | SI9961 |
| 廠商： | Vishay Intertechnology,Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 12-V Voice Coil Motor Driver |
| 中文描述： | 12 V的音圈電機驅動器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 69K |
| 代理商： | SI9961 |
Si9961
Vishay Siliconix
Document Number: 70014
S-20883—Rev. G, 24-Jun-02
www.vishay.com
1
12-V Voice Coil Motor Driver
FEATURES
1.8-A H-Bridge Output
Class B Linear Operation
Externally Programmable Gain and
Bandwidth
Undervoltage Head Retract
Programmable Retract Current
Low Standby Current
Rail-to-Rail Output Swing
Single 12-V Supply
System Voltage Monitor with Fault Output
DESCRIPTION
The Si9961 is a linear actuator (voice coil motor) driver suitable
for use in disk drive head positioning systems. The Si9961
contains all of the power and control circuitry necessary to
drive the VCM that is typically found in 3
1
/
2
-inch hard disk
drives and optical disk drives. The driver is capable of
delivering 1.8 A at a nominal supply of 12 V.
The Si9961 provides all necessary functions including a motor
current sense amplifier, a loop compensation amplifier and a
power amplifier featuring four complementary MOSFETs in a
H-bridge configuration. The output crossover protection
ensures no cross-conducting current and true Class B
operation during linear tracking. Externally programmable
gain switch at the input summing junction increases the
resolution and dynamic range for a given DAC. The head
retract circuitry can be activated by either an undervoltage
condition or an external command. An external resistor is
required to set the VCM current during retract.
The Si9961 is constructed on a self-isolated BiC/DMOS power
IC process. The IC is available in 24-pin SO package for
operation over the commercial, C suffix (0 to 70 C)
temperature range.
FUNCTIONAL BLOCK DIAGRAM
A3
A4
Q3
Q4
Q1
Q2
A5
A2
OA2
IA2–
FAULT
RETRACT
R
INH
R
INL
V
CC
V
DD
V+
EXT
V
REF
V
REF–
V
R
OUTPUT
A
I
SENSE
I
SENSE
+
–
Retract
Control
–
+
Voltage
Monitor
–
+
–
+
I
RET
GND
V
R
V
R
R
FB
GAIN
SELECT
I
SENSE
SA
SB
Acceleration Error
V
R
OUTPUT
B
8
18
7
12
17
19
20
16
14
15
21
13
3
24
2
1
10
22
11
6
9
23
5
4
R
7 R
R
8 R
Enable
相關PDF資料 |
PDF描述 |
|---|---|
| Si9976 | N-Channel Half-Bridge Driver |
| SI9976DY | N-Channel Half-Bridge Driver |
| SI9978 | Configurable H-Bridge Driver |
| SI9978DW | Configurable H-Bridge Driver |
| SI9978DW-T1 | Configurable H-Bridge Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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/運動/點火控制器和驅動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| SI9961ACY-E3 | 功能描述:馬達/運動/點火控制器和驅動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| SI9961ACY-T1 | 功能描述:馬達/運動/點火控制器和驅動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| SI9961ACY-T1-E3 | 功能描述:馬達/運動/點火控制器和驅動器 Voice Coil Driver RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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