LSI-LS7290 | Anaheim Automation, Inc.

The LS7290 generates Phase Drive outputs and PWM outputs for controlling two phase Bipolar motors or four phase Unipolar motors, respectively. The LS7290 contains a mode controlled look-up table for generating the motor duty cycle drive sequences. A table pointer is used which is incremented or decremented by a value determined by the operating mode and the direction control. The 8-bit PWM control and the refresh rate are set using an internal oscillator controlled by a crystal or by use of an external input clock. Peak current feedback control using pulse width modulation chopping can be used in full-step or half-step modes. The chopper consists of a voltage comparator, flip-flop and external sense resistor. The VREF voltage sets the peak current in each motor winding.

Note: This series has a minimum purchase requirement of 10 pieces, regardless of stock.

• Stepper Motor Control Chip
• Controls Bipolar and Unipolar Motors
• Full, 1/2, 1/4, 1/8, 1/16, 1/32 Step Mode Selected with 3 Mode Inputs
• Direction and Current Control

• 8-bit PWM Resolution
• All Inputs and Outputs TTL/CMOS Compatible
• 3V to 5.5V Operation (Vdd - Vss)
• RoHS Compliant