A8983CJT

更新时间： 2024-01-16 18:31:14

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器运动控制电子器件信号电路电动机控制信息通信管理
页数	文件大小	规格书
2页	42K
描述
SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER

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A8983CJT 技术参数

生命周期：	Obsolete	零件包装代码：	QFP
包装说明：	LFQFP,	针数：	64
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
Is Samacsys：	N	模拟集成电路 - 其他类型：	DISK DRIVE MOTOR CONTROLLER
JESD-30 代码：	S-PQFP-G64	长度：	10 mm
功能数量：	1	端子数量：	64
最高工作温度：	70 °C	最低工作温度：
最大输出电流：	1.6 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	LFQFP	封装形状：	SQUARE
封装形式：	FLATPACK, LOW PROFILE, FINE PITCH	认证状态：	Not Qualified
座面最大高度：	1.651 mm	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	3 V	表面贴装：	YES
技术：	BICMOS	温度等级：	COMMERCIAL
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	宽度：	10 mm
Base Number Matches：	1

A8983CJT 数据手册

8983

SPINDLE & VOICE-COIL

8983

ACTUATION MANAGER/DRIVER

SPINDLE & VOICE-COIL

ACTUATION MANAGER/DRIVER

The A8983CJT provides for complete spindle and voice coil power

electronics for small form-factor HDDs (hard disk drives). The large-

scale integration and use of advanced DABiC (digital/analog-BiCMOS)

merged technologies result in minimum power dissipation, minimum

operating voltage, and minimum external components.

The spindle driver system incorporates a three-phase MOS power

driver and a back-EMF sensing motor commutation scheme. A pat-

ented circuit eliminates the need for an external current-sense resistor,

achieving additional headroom. Intrinsic ground clamp and flyback

diodes are also provided.

The voice-coil system incorporates a MOS H-bridge driver, sense

amplifier, error amplifier, and programmable retract circuitry.

The spindle and voice-coil control functions are supplemented by

™

an ENERGY MANAGER , which efficiently channels available spindle

BEMF to protect the heads and the data disk during system power

supply failure. Active regeneration of spindle BEMF provides nearly

lossless conversion of spindle BEMF into supply voltage to operate the

voice coil motor for parking the heads. A dc-to-dc converter provides for

full power MOS r_DS(on)performance at minimum supply voltages. In

addition, the ENERGY MANAGER provides several energy-saving sleep

modes and latched fault states for undervoltage and serial port com-

manded fault.

Dwg. PP-060

The A8983CJT is supplied in a 64-lead low-profile quad flatpack for

surface-mount applications.

FEATURES

Voice Coil Motor Driver:

■ Low r_DS(on)MOS Outputs

■ Zero Deadband

■ Externally Determined Transconductance, with Hi/Lo

Configuration Switched via Serial Port

■ Current Sensing with External Series Sense Resistor

■ Serial Port Programmable Actuator Retract Circuitry

■ Retract Circuitry Functional to 1.7 V Spindle BEMF

ABSOLUTE MAXIMUM RATINGS

at T = +25°C

Load Supply Voltage, V_CC(PWR)............ 7.0 V

Spindle Output Current, I_OUT(S).......... ±1.6 A

Voice-Coil Output Current, I_OUT(A)...... ±0.9 A

Logic Supply Voltage V_CC(D)................ 6.0 V

Operating Temperature Range,

Spindle Motor Controller/Driver:

■ Low r_DS(on)MOS Outputs

T_A...................................... 0°C to +70°C

■ Back-EMF Circuitry Eliminates Hall-Effect Sensors

■ Adaptive Commutation Delay Programmable via Serial Port

■ Programmable Slew Rate (soft switching) Eliminates Snubbers

■ Intrinsic Ground Clamp and Flyback Diodes

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.

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