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L6237 Datasheet

  • L6237

  • 11頁

  • ETC

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L6237
5V SPINDLE MOTOR DRIVER
PRODUCT PREVIEW
OPERATES FROM 5V SUPPLY
1.5A MAXIMUM START-UP CURRENT
INTEGRATED PHASES COMMUTATION SE-
QUENCER
PROGRAMMABLE SLEW RATE
BACK EMF COMPARATOR OUTPUT
BRAKE FUNCTION INPUT WITH USER CON-
FIGURABLE DELAY
LOW POWER CONSUMPTION MODE
OVER TEMPERATURE PROTECTION
DESCRIPTION
The L6237 is a Triple Half bridge Driver intended
for use in brushless DC motor applications. The
device is designed to drive a Three Phase,
Brushless DC Motor, Typically used in Rigid Disk
Drives. Power drivers are fabricated in DMOS
Technology and feature Fast Internal Recircula-
tion Diodes. All logic inputs are CMOS/TTL com-
BLOCK DIAGRAM
TQFP64L
patible, and an internal Transconductance Loop is
included for linear motor speed control. Upper N-
Channel DMOS Transistors are driven via an In-
ternal Step-Up Converter. The IC will be manu-
factured in a plastic TQFP64 surface mount
package.
September 1993
1/11
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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