LSI Computer Systems LS7362
The LS7362 is a monolithic, ion implanted MOS circuit designed to generate the signals necessary to control a three phase or four phase brushless DC motor. It is the basic building block of a brushless DC motor controller. The circuit responds to changes at the SENSE inputs, originating at the motor position sensors, to provide electronic commutation of the motor windings.FEATURES
:● Speed Control by Pulse Width Modulation (PWM) of low-side drivers only.
● Open or closed loop motor speed control.
● +5 to +28 Volt operation (Vss - VDD).
● Externally selectable input to output code for 60°, 120°, 240°, or 300° electrical sensor spacing.
● Three or four phase operation.
● Analog Speed control.
● Forward/Reverse control.
● Output Enable control.
● Positive Static Braking.
● Overcurrent Sensing.
● Six outputs drive switching bridge directly.
● LS7362 (DIP); LS7362-S (SOIC); LS7362-TS (TSSOP) - See Connection Diagram CONNECTION DIAGRAM - TOP VIEW STANDARD 20 PIN PLASTIC DIP CS1 OUT 1 OUT 2 OUT 3 COMMON OUT 4 1 2 3 20 19 18 CS2 FORWARD/REVERSE V DD (-V) LSI 4 17 S3 S2 S1 OSCILLATOR LS7362 5 6 16 15 14 OUT 5 OUT 6 BRAKE 7 8 9 13 12 11 V TRIP OVERCURRENT SENSE V SS (+V)
DESCRIPTION
: Pulse width modulation (PWM) of low-side drivers for motor speed control is accomplished through either the ENABLE input or through the V TRIP input (Analog Speed control) in conjunction with the OSCILLATOR input.