L6232B

L6232B 1.5A MAXIMUM PEAK CURRENT CONTROLLED SLEW RATE CENTRAL CHARGE PUMP PWM AND LINEAR MODES CUTOFF TIME USER CONFIGURABLE FAST, FREE-WHEELING DIODES ON CHIP OVER-TEMPERATURE PROTECTION BRAKE FUNCTION INPUT DESCRIPTION The L6232B is a triple half bridge driver intended for use in brushless DC motor applications. This part can be used to form the power stage of a three-phase, brushless DC motor control loop, and is especially useful for disk drive applications. Power drivers are Integrated DMOS transistors and feature fast recirculating diodes as an integral BLOCK DIAGRAM SPINDLE DRIVER ADVANCE DATA PLCC21+7 ORDERING NUMBER: L6232B part of their structure. The logic inputs are TTLlevel compatible, with internal pull-up, allowing interfacing to open collector outputs. All necessary circuitry to perform PWM and linear motor speed control is included. A central charge pump is utilized to drive the upper DMOS transistors, and also to power the braking function. The L6232B is packaged in PLCC28. March 1993 1/10 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. L6232B PIN DESCRIPTION Pin 1 to 4 5, 9 6 7, 11 8 10 12 13 Name GND SENSE INLB VS INLA CS CP RC 14 15 16 17 18 19 20 21 22 23 24 25 26 to 28 INLC BRK DLY INUC PWM Vref LIN Vref COMP OUTA BRK OUTB INUA INUB OUTC GND Function Common Ground. Also provides heat-sink to PCB. Output for current sense resistors. Logic Input to turn on...