L7220 datasheet(1/4 Pages) STMICROELECTRONICS

部件名	L7220

功能描述	Disk drive spindle and VCM motor driver

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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Data Brief

For further information contact your local STMicroelectronics sales office.

December 2007

Rev 1

1/4

4

L7220

Disk drive spindle and VCM motor driver

Features

■ Suitable for enterprise and multi-platter

desktop high performance drives

■ Register based architecture

■ Serial communication interface up to 60MHz

VCM driver

■ 2.5A peak current drive capability

■ Integrated bridge power devices with 0.3

Ωmax

bridge impedance

■ 15 bit linear DAC for current command with

gain switch

■ Power on ramp loading and unloading

capability with 10 bit ADC

■ Fully integrated discontinuous mode ramp

unload circuitry at power off with end of travel

detection or alternate voltage mode power off

scheme

Spindle driver

■ 3.0A peak current drive capability

■ Integrated bridge power devices with 0.3

Ωmax

bridge impedance

■ ST’s SmoothDrive™ architecture

■ Voltage mode sinusoidal driving

■ Inductance sense start-up capability

Other functions

■ 4 high efficiency hysteretic switching positive

regulators controllers with voltage margining

■ -5V regulator controller with voltage margining

■ External isolation FET driver

■ Voltage monitoring

■ Power-on reset with soft start and

programmable integrated delay

■ 10 bit ADC with multiplexed inputs

■ Thermal sense circuit and overtemperature

shutdown

Description

L7220 is a motor controller IC designed for both

enterprise and multi-platter desktop hard disk

drive applications.

The spindle motor driver subsystem integrates all

power FETs driven by ST’s SmoothDrive

commutation technology.

The voice coil driver block includes the power

FETs, as well as ramp load and unload capability.

Hysteretic switching regulator controllers are

included.

L7220 embeds a serial interface with a maximum

speed of 60MHz.

TQFP64

(exposed pad down)

Table 1.

Device summary

Order code

Package

Packing

L7220

TQFP64

Tray

www.st.com

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类似说明 - L7220

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