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L6238SQA 데이터시트(PDF) 1 Page - STMicroelectronics |
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1 / 31 page L6238S 12V SENSORLESS SPINDLE MOTOR CONTROLLER PRODUCT PREVIEW 12V OPERATION 3A, THREE-PHASE DMOS OUTPUT (TOTAL Rdson 0.52 Ω) 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. Protection features include Stuck Rotor\Backward Rotation Detection and Automatic Thermal Shut- down. This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. October 1995 ZERO CROSSING DETECTOR ALIGN + GO START-UP ONE-SHOT SLEW-CTRL PWM LIN VL THERMAL SHUTDOWM OT-WARN CHARGE PUMP CPUMP3 CPUMP1 CPUMP2 D95IN232 BIAS POWER STAGE AV=4V/V DIGITAL DELAY OUT B OUT C CTR TAP CSA INPUT GND PWM TIM VANALOG + + + - BEMF SENSE VPOWER BRAKE DELAY RSENSE1 DRV CNTL TDLY(0) + - CSA OUT A GATE DRIVE GM COMP SYSTEM CLOCK SYS CLOCK RSENSE2 VCTRL PWM COMP PWM/ SLEW SEQUENCER FALIGN OUTPUT ENABLE RUN/ BRAKE SEQ INCR MONO/SEQ CTRL TDLY(1) TDLY(2) MONO DET MASK DLY TOGGLE DIVIDE BY N SPIN SENSE FMTR SEL POL BLOCK DIAGRAM ORDERING NUMBERS: L6238S (PLCC44) L6238SQA (PQFP44) L6238SQT (TQFP64) PLCC44 PQFP44 TQF P64 1/31 |
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