1/8/2014 2 www.onsemi.com
Test Procedure:
1. Connect the test setup as shown above.
2. Set it according to the following guide.
[Supply Voltage] VDD, VS (1.9V to 6.5V) : Power Supply for LSI
VIN (2.0 to 6.0V) : 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 ENA , IN1 and IN2.
2.
Power Supply: Supply DC voltage to VS and VDD and VIN.
3.
Ready for Operation from Standby State: Turn “High” the ENA terminal toggle switch.
4.
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
VDD=3.3V,VIN=3.3V
ENA=H
IN1 , IN2=Full-step signal
* Refer to the following waveform
Typical current waveform
LB1939T Full-Step(VCC=3.3V, 200pps)
IN1
IN2
100
0
-100
(%)
100
0
-100
I1
I2
