Test Procedure for the LV8549MGEVB Evaluation Board For Stepper Motor Control CURRENT PROBE AMPLIFIER1 Osclloscope PROBE INPUT OUTPUT CHANNEL 1 2 3 4 Stepping Motor Power supply 1 A V - + Logic generator Power supply 2 A V CHANNEL 1 - 2 3 4 + Table1: Required Equipment Equipment Power supply1 Power supply2 Logic generator Oscilloscope Current probe1 LV8549M Evaluation Board Stepper Motor 1/8/2014 1 Efficiency 25V-3A 5V-0.5A 200kHz 4 channel 25V-2A www.onsemi.com Test Procedure: 1. Connect the test setup as shown above. 2. Set it according to the following specifications: Supply Voltage • • VCC (4 to 16V) : Power Supply for LSI VIN (1.8 to 5.5V) : Logic “High” voltage for toggle switch Toggle Switch State • • • Upper Side: High (VIN) Middle: Open, enable to external logic input Lower Side: Low (GND) Operation Guide • • • • Initial Condition Setting: Set “Open” the toggle switches ENA , IN1 and IN2. Power Supply: Supply DC voltage to VCC and VIN. Ready for Operation from Standby State: Turn “High” the ENA terminal toggle switch. Motor Operation: Input the signal which is in condition to want to operate into IN1 and IN2. 3. Check the IN1 , IN2 and OUT1 terminal voltage at scope CH1 , CH2 and CH3, and the output current waveform at scope CH4. Table2: Desired Results INPUT VCC=12V VIN=5V ENA=H IN1 , IN2=Full-step signal 1/8/2014 OUTPUT * Refer to the following waveform 2 www.onsemi.com LV8549M Full-Step VCC=12V 200pps T=5ms/div IOUT1 500mA/div IN1 IN2 (%) 100 I1 VOUT1 10V/div 0 -100 IN1 5V/div 100 I2 0 IN2 5V/div -100 1/8/2014 3 www.onsemi.com