Test Procedure for the LB1948MC 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 CHANNEL V 1 - 2 3 4 + Table1: Required Equipment Equipment Power supply1 Power supply2 Logic generator Oscilloscope Current probe1 LB1948MC Evaluation Board Stepper Motor 1/8/2014 Efficiency 25V-3A 10V-0.5A 4 channel 25V-2A 1 www.onsemi.com Test Procedure: 1. Connect the test setup as shown above. 2. Set it according to the following guide. [Supply Voltage] VCC (2.5 to 16V) : Power Supply for LSI VIN (1.8 to 10V) : 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] 1. Initial Condition Setting: Set “Open” the toggle switches IN1-IN4. 2. Power Supply: Supply DC voltage to VCC and VIN. 3. Motor Operation: Input the signal which is in condition to want to operate Full-step , Halfstep into IN1-IN4. 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 IN1-IN4=Full-step or Half-step signal OUTPUT * Refer to the following waveform Typical current waveform IN1 IN1 IN2 IN2 IN3 IN3 IN4 IN4 (%) 100 (%) 100 I1 I1 0 100 100 I2 0 -100 -100 I2 0 0 -100 -100 LB1948MC Full-Step(VCC=12V,200pps) High Low Low High High Low LB1948MC Half-Step(VCC=12V,200pps) Ch1 IN1 10V/div High Ch2 IN2 10V/div Low Ch3 VOUT1 10V/div Low High High Ch1 IN1 10V/div Ch2 IN2 10V/div Ch3 VOUT1 10V/div Off Low Ch4 IOUT1 200mA/div Ch4 IOUT1 200mA/div T=5ms/div T=5ms/div 1/8/2014 2 www.onsemi.com For DC motor control CURRENT PROBE AMPLIFIER1 Osclloscope PROBE INPUT OUTPUT CHANNEL 1 2 3 4 DC Motor Power supply 1 A V - + Function generator Hz Power supply 2 A CHANNEL V 1 - 2 + Table3: Required Equipment Equipment Power supply1 Power supply2 Function generator Oscilloscope Current probe LB1948MC Evaluation Board DC Motor 1/8/2014 Efficiency 25V-3A 10V-0.5A 200kHz 4 channel 25V-2A 3 www.onsemi.com Test Procedure: 1. Connect the test setup as shown above. 2. Set it according to the following guide. [Supply Voltage] VCC (2.5 to 16V) : Power Supply for LSI VIN (1.8 to 10V) : 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] 1. Initial Condition Setting: Set “Open” the toggle switches IN1-IN4. 2. Power Supply: Supply DC voltage to VCC and VIN. 3. Motor Operation: Set IN1, IN2, IN3, and IN4 terminals according to the purpose. 3. Check the IN2, OUT1, and OUT2 terminal voltage at scope CH1, CH2, and CH3, and the output current waveform at scope CH4. 4. Connected in the same way as the 1ch side and measure the 2ch side . Table4: Desired Results INPUT VCC=12V VIN=5V IN1=High IN2=10KHz (Duty50%) OUTPUT * Refer to the following waveform T=20µs/div IOUT1 500mA/div OUT2 10V/div OUT1 10V/di IN2 5V/div DCM output control logic Input Output Remarks IN1 IN2 IN3 IN4 OUT1 OUT2 OUT3 OUT4 L L L L OFF OFF OFF OFF L L OFF OFF H L H L L H L H H H L L L 1/8/2014 Stand-by Stand-by 1CH Forward Reverse Brake L OFF H L H L L H L H H H L L 4 OFF Stand-by 2CH Forward Reverse Brake www.onsemi.com