Datasheet > AT78C7005

AT78C7005

更新时间： 2024-12-01 08:38:35

品牌	Logo	应用领域
爱特美尔 - ATMEL		驱动器电动机控制
页数	文件大小	规格书
4页	132K
描述
Spindle/VCM MotorController/Drivers

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中文翻译

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数据手册

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AT78C7005 数据手册

Features

• Operates from Single Supply: 3.3V or 5V

• Small Footprint 64-Pin TQFP Package or Flip Chip

• Precision Low-voltage Monitor Circuitry for the Power Supply

• Master Power on Reset

• Serial Port Interface with Read-back Capability

• Over-temperature Protection/Warning

• Shock Sensor Signal Processing

• On-chip 1.8V, 2.5V and -3V Regulators

• Low Power Consumption, 9 mA in Normal Run Mode

• Spindle Driver

Spindle/

– Commutator is Driven by a FLL for High Immunity to Jitter

– Programmable 10-bit DAC

VCM Motor

Controller/

Drivers

– Adjustable Slew Rate Control

– External Startup Capability

– 1.0A Current Capability with R_on= 1Ω

– Digital Commutation Delay and Blanking

– Programmable Delay from BEMF Zero Crossing

– External INDEX Signal for Spin Lock

– Active Spindle Braking Capability

• VCM Driver

AT78C7005

Summary

– 0.4A Current Capability with R_on= 1.5Ω

– Programmable 14-bit DAC

– Ramp Load/Unload Capability with 10-bit ADC

– Power-off Retract with 9V Charge-pump

– Programmable VCM Current Controlled by Sense Resistor

• Available in a Variety of Packages Depending on Customer Requirements

Description

The AT78C7005 is a CMOS monolithic device that integrates Spindle and VCM con-

trollers as well as power stages into one chip. The device operates from 3.3V or 5V

power supply. The AT78C7005 is designed for a small-form-factor hard disk drive

application.

A precision low-voltage detection circuit monitors the power supply and initiates VCM

retract at voltage fault condition. A 3-line serial port interface with read back capability

provides interface to the microprocessor.

The Spindle driver features a transconductance amplifier, a current sense amplifier,

power output drivers, sequencer, internal delay/masking logic, Spindle brake circuit,

FLL, and charge-pump for locking the spindle to the programmed rotational speed.

The VCM driver features a transconductance amplifier, differential input current sense

amplifier, ramp load/unload capability, and power output amplifier.

3432BS–NETST–5/04

Note: This is a summary document. A complete document

is available under NDA. For more information, please con-

tact your local Atmel sales office.

12 3 4

中文翻译

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与AT78C7005相关器件

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AT78C7015	ATMEL	获取价格	Spindle/VCM Motor Controller/Drivers AT78C7015 Summary
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AT7909EKA-MQ	ATMEL	获取价格	MICROCIRCUIT, DIGITAL, CMOS, MONOLITHIC SILICON SINGLE CHIP TELEMETRY AND TELECOMMAND AT79
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