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L6238SQT Datasheet

  • L6238SQT

  • 12V SENSORLESS SPINDLE MOTOR CONTROLLER

  • 324.92KB

  • 31頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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L6238S
12V SENSORLESS SPINDLE MOTOR CONTROLLER
PRODUCT PREVIEW
12V OPERATION
3A, THREE-PHASE DMOS OUTPUT
(TOTAL R
dson
0.52鈩?
NO HALL SENSORS REQUIRED
DIGITAL BEMF PROCESSING
LINEAR OR PWM CONTROL
STAND ALONE OR EXT. DRIVER
SHOOT-THROUGH PROTECTION
THERMAL SHUTDOWN
DESCRIPTION
The L6238S is a Three-Phase, D.C. Brushless
Spindle Motor Driver system. This device features
both the Power and Sequence Sections.
Higher Power Applications can be activied with
the addition of an external Linear Driver, or by op-
erating the Internal Drivers in PWM.
Motor Start-Up, without the use of Hall Sensors,
can be achieved either by an internal start-up al-
gorithm or by manually sequencing the Output
Drivers, using a variety of User-Defined Start-UP
Algorithms.
BLOCK DIAGRAM
VL
FALIGN
OUTPUT
ENABLE
RUN/
BRAKE
PWM/
SLEW
PWM
LIN
PWM
COMP
PWM
TIM
CHARGE
PUMP
VANALOG
BIAS
ONE-SHOT
SLEW-CTRL
POWER
STAGE
SYS CLOCK
SYSTEM
CLOCK
ALIGN + GO
START-UP
PLCC44
PQFP44
TQFP64
ORDERING NUMBERS:
L6238S (PLCC44)
L6238SQA (PQFP44)
L6238SQT (TQFP64)
Protection features include Stuck Rotor\Backward
Rotation Detection and Automatic Thermal Shut-
down.
CPUMP1
CPUMP2
CPUMP3
VPOWER
SEQ INCR
MONO/SEQ
CTRL
BRAKE
DELAY
SEQUENCER
TDLY(0)
TDLY(1)
TDLY(2)
MASK DLY
DIGITAL
DELAY
MONO
DET
ZERO
CROSSING
DETECTOR
+
BEMF
+
SENSE
+
OUT A
OUT B
OUT C
CTR TAP
-
SPIN
SENSE
TOGGLE
DIVIDE
BY N
RSENSE1
+
-
DRV
CNTL
RSENSE2
OT-WARN
THERMAL
SHUTDOWM
AV=4V/V
CSA
GND
CSA INPUT
SEL POL
FMTR
VCTRL
GM COMP GATE DRIVE
D95IN232
October 1995
1/31
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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