SI9961A

更新时间： 2024-09-15 06:11:39

品牌	Logo	应用领域
威世 - VISHAY		驱动器电机
页数	文件大小	规格书
9页	112K
描述
12-V Voice Coil Motor Driver

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SI9961A 数据手册

Si9961A

Vishay Siliconix

12-V Voice Coil Motor Driver

FEATURES

D 1.8-A H-Bridge Output

D Undervoltage Head Retract

D Rail-to-Rail Output Swing

D Class B Linear Operation

D Programmable Retract Current D Single 12-V Supply

D Externally Programmable Gain and

D Low Standby Current

D System Voltage Monitor with Fault Output

Bandwidth

DESCRIPTION

The Si9961A is a linear actuator (voice coil motor) driver

suitable for use in disk drive head positioning systems. The

Si9961A contains all of the power and control circuitry

necessary to drive the VCM that is typically found in 3¹/₂-inch

hard disk drives and optical disk drives. The driver is capable

of delivering 1.8 A at a nominal supply of 12 V.

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 Si9961A provides all necessary functions including a

motor current sense amplifier, a loop compensation amplifier

The Si9961A is constructed on a self-isolated BiC/DMOS

power IC process. The IC is available in both standard and

lead (Pb)-free, 24-pin SO packages for operation over the

commercial, C suffix (0 to 70_C) temperature range.

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

FUNCTIONAL BLOCK DIAGRAM

EXT

REF

V+

REF−

FAULT

Voltage

Monitor

8 R

OUTPUT

−

IA2−

OUTPUT

−

RETRACT

Retract

Control

RET

Enable

OA2

−

Acceleration Error

7 R

−

GAIN

SELECT

15 14

16 20

INH

INL

GND

SENSE

OUT

SENSE

IN+

SENSE

IN−

Document Number: 70014

S-40845—Rev. H, 03-May-04

www.vishay.com

12 3 4 5 6 7...9

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与SI9961A相关器件

型号	品牌	获取价格	描述	数据表
SI9961ACY	VISHAY	获取价格	12-V Voice Coil Motor Driver
SI9961ACY-E3	VISHAY	获取价格	Motion Control Electronic, BCDMOS, PDSO24
SI9961ACY-T1	VISHAY	获取价格	12-V Voice Coil Motor Driver
SI9961CY	VISHAY	获取价格	Motion Control Electronic, BCDMOS, PDSO24,
SI9961DJ	VISHAY	获取价格	Interface Circuit
SI9976	VISHAY	获取价格	N-Channel Half-Bridge Driver
SI9976DY	VISHAY	获取价格	N-Channel Half-Bridge Driver
SI9976DY-T1	VISHAY	获取价格	N-Channel Half-Bridge Driver
SI9976DY-T1-E3	VISHAY	获取价格	N-Channel Half-Bridge Driver
SI9978	VISHAY	获取价格	Configurable H-Bridge Driver