Test Procedure for the LV8746VGEVB Evaluation Board For Clock Input Control CURRENT PROBE AMPLIFIER 1 Osclloscope CURRENT PROBE AMPLIFIER 2 PROBE INPUT PROBE INPUT OUTPUT OUTPUT CHANNEL 1 2 3 4 Stepping Motor Power supply 1 A V Multimeter - + VOUT - + Power supply 2 A V Power supply 3 A V ATT2 ATT1 - RST STP FR MD2 MD1 + DM OE ST + Function generator Hz CHANNEL 1 2 Table1: Required Equipment Equipment Power supply1 Power supply2 Power supply3 Function generator Multimeter Oscilloscope Current probe1 Current probe2 LV8746V Evaluation Board Stepper Motor 1/8/2014 1 Efficiency 35V-5A 5V-0.5A 10V-1A 200kHz 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 35V): 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/I01, and “Open or Low” the other switches. 2. Motor Connection: Connect the Motors between OUT1A and OUT1B, between OUT2A and OUT2B. 3. Power Supply: Supply DC voltage to VM, VREF and VDD. 4. Ready for Operation from Standby State: Turn “High” the ST terminal toggle switch. Channel 1 and 2 are into full-step initial position (100%, -100%). 5. Motor Operation: Input the clock signal into the terminal STP/I01. 6. Other Setting: (See Application Note for detail) i. ATT1, ATT2: Motor current attenuation. ii. EMM: Short circuit protection mode change. iii. RST/PH1: Initial Mode. iv. FR/I11: Motor rotation direction (CW / CCW) setting. v. MD1/I02, MD2/PH2: Excitation mode. vi. OE/I12: Output Enable. 3. Check VREG5 and VG terminal voltage at multimeter. 4. Check the STEP/DC22 and MONI terminal voltage at scope CH1 and CH2, and the output current waveform at scope CH3 and CH4. Table2: Desired Results INPUT OUTPUT VM=24V,VDD=3.3V,VREF=1.5V ST=H,DM=L EMM=L,RST/PH1=L,OE/I12=L VREG5=4.5V to ATT1=ATT2=L, 5.5V FR/I11=L VG=28V to 29.8V MD1/I02=MD2/PH2=H STP/I01=500Hz (Duty50%) 1/8/2014 2 www.onsemi.com 20ms/div CH1 STEP 5V/div CH3 Iout1 0.5A/div Iout1 1A/div Iout2 0.5A/div Iout2 CH3 CH4 CH4 1/8/2014 1A/div 3 www.onsemi.com For Parallel Input Control CURRENT PROBE AMPLIFIER 2 Osclloscope PROBE INPUT OUTPUT CHANNEL 1 2 3 4 Stepping Motor Power supply 1 A V Multimeter - + VOUT - + Power supply 2 A V Power supply 3 A V ATT2 ATT1 - PH1 I01 I11 PH2 I02 + DM I12 ST + Signal generator Table3: Required Equipment Equipment Power supply1 Power supply2 Power supply3 Function generator Multimeter Oscilloscope Current probe LV8746V Evaluation Board DC Motor 1/8/2014 4 Efficiency 35V-5A 5V-0.5A 10V-1A 200kHz 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 35V): 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 DM, and “Open or Low” the other switches. 2. Motor Connection: Connect the Motor(s) between OUT1A and OUT1B, between OUT2A and OUT2B. 3. Power Supply: Supply DC voltage to VM, VREF and VDD. 4. Ready for Operation from Standby State: Turn “High” the ST and DM terminal toggle switch. 5. Motor Operation: Set STP/I01, FR1/I11, RST/PH1, MD1/I02, OE/I12 and MD2/PH2 terminals according to the purpose. 6. Other Setting: (See Application Note for detail) i. ATT1, ATT2: Motor current attenuation. 3. Check VREG5 and VG terminal voltage at multimeter. 4. Check the STP/I01, FR1/I11 and RST/PH1; terminal voltage at scope CH1, CH2 and CH3, and the output current waveform at scope CH4. 5. Switch to channel 2(MD1/I02, OE/I12, MD2/PH2) as well as channel 1(STP/I01, FR1/I11, RST/PH1) and measure it. Table4: Desired Results INPUT OUTPUT VM=24V,VDD=3.3V,VREF=1.5V VREG5=4.5V to ST=H,DM=H 5.5V EMM=L,ATT1=ATT2=L, VG=28V to 29.8V 1/8/2014 5 www.onsemi.com 5ms/div <1> I01 5V/div <2> I11 5V/div <3> PH1 5V/div Iout1 1A/div <4> 1/8/2014 6 www.onsemi.com