Test Procedure for the LV8773GEVB Evaluation Board For Stepper Motor Control Function generator1 Function generator2 Hz Hz CHANNEL 1 Power supply 3 A CHANNEL 2 1 2 V Power supply 1 A - V + - + Power supply 2 A V - + Multimeter VOUT - + Stepping Motor CURRENT PROBE AMPLIFIER 2 CURRENT PROBE AMPLIFIER 1 PROBE INPUT PROBE INPUT OUTPUT OUTPUT Osclloscope CHANNEL 1 2 3 4 Table1: Required Equipment Equipment Power supply1 Power supply2 Power supply3 Function generator Multimeter Oscilloscope Current probe1 Current probe2 LV8773V Evaluation Board Stepper Motor 1/8/2014 1 Efficiency 35V-5A 5V-0.5A 10V-1A 100Hz 4 channel 35V-3A www.onsemi.com Test Procedure: 1. Connect the test setup as shown above. 2. Set it according to the following specifications. Supply Voltage • • • VM (9 to 32V): Power Supply for LSI VREF (0 to 3V): Const. Current Control for Reference Voltage VDD (2 to 5V): Logic “High” voltage for toggle switch Toggle Switch State • • • Upper Side: High (VDD) Middle: Open, enable to external logic input Lower Side: Low (GND) Operations Guide 1. Initial Condition Setting: Set “Open” the toggle switch STP/D22, and “Open or Low” the other switches. 2. Power Supply: Supply DC voltage to VM, VREF and VDD. 3. Ready for Operation from Standby State: Turn “High” the ST terminal toggle switch. Channel 1 and 2 are into 2-phase excitement initial position (100%, -100%). 4. Motor Operation: Input the clock signal into the terminal DC11, DC12, DC21, and DC22. 5. Other Setting: (See Application Note for detail) i. ATT: Motor current attenuation. ii. EMM: Short circuit protection mode change. 3. Check VREG5 and VG terminal voltage at multimeter. 4. Check the DC11 and DC21 terminal voltage at scope CH1 and CH2, and the output current waveform at scope CH3 and CH4. INPUT(Full step) VM=24V VREF=0.8V VDD=5V ST=High EMM=Low, ATT =Low DC11=100Hz(Duty50%) DC12=The reverse pulse of DC11 DC21=100Hz(Duty50%) DC22=The reverse pulse of DC21 1/8/2014 Table2: Desired Results INPUT(Half step) VM=24V VREF=0.8V VDD=5V ST=High EMM=Low, ATT =Low DC11=200Hz(Duty37.5%) DC12=The reverse pulse of DC11 DC21=200Hz (Duty37.5%) DC22=The reverse pulse of DC21 2 OUTPUT VREG5=4.5V to 5.5V VG=28V to 29.8V www.onsemi.com 1/8/2014 3 www.onsemi.com For DC Motor Control Function generator1 Hz CHANNEL Power supply 3 A V 1 2 Power supply 1 A - V + - + Power supply 2 A V - + Multimeter VOUT - + DC Motor CURRENT PROBE AMPLIFIER 1 Osclloscope PROBE INPUT OUTPUT CHANNEL 1 2 3 4 Table3: Required Equipment Equipment Power supply1 Power supply2 Power supply3 Function generator Multimeter Oscilloscope Current probe LV8773 Evaluation Board DC Motor 1/8/2014 Efficiency 35V-5A 5V-0.5A 10V-1A 200kHz 4 channel 35V-3A 4 www.onsemi.com Test Procedure: 1. Connect the test setup as shown above. 2. Set it according to the following specifications. Supply Voltage • • • VM (9 to 32V): Power Supply for LSI VREF (0 to 3V): Const. Current Control for Reference Voltage VDD (2 to 5V): Logic “High” voltage for toggle switch Toggle Switch State • • • Upper Side: High (VDD) Middle: Open, enable to external logic input Lower Side: Low (GND) Operations Guide 1. Initial Condition Setting: Set “Open or Low” the other switches. 2. Power Supply: Turn “High” the ST terminal toggle switch. 3. Ready for Operation from Standby State: Turn “High” the ST terminal toggle switch. 4. Motor Operation: Set DC11, DC12, DC21, and DC22 terminals according to the purpose. 5. Other Setting: (See Application Note for detail) i. ATT: Motor current attenuation. ii. EMM: Short circuit protection mode change. 3. Check VREG5 and VG terminal voltage at multimeter. 4. Check the DC12, OUT1A, and OUT1B terminal voltage at scope CH1, CH2, and CH3, and the output current waveform at scope CH4. 5. to channel 2(DC22, OUT2A, OUT2B) as well as channel 1(DC12, OUT1A, OUT1B) and measure it. Table4: Desired Results INPUT OUTPUT VM=24V VREF=1.5V VDD=5V ST=High VREG5=4.5V to DM=High 5.5V EMM=Low VG=28V to 29.8V ATT=Low DC21=DC22=Low DC11=High DC12=100kHz (Duty50%) 1/8/2014 5 www.onsemi.com 2μs/div 1/8/2014 CH1 DC12 5V/div CH2 OUT1A 10V/div CH3 OUT1B 10V/div CH4 Iout1 1A/div 6 www.onsemi.com