Test Procedure for the LV8548MGEVB Evaluation Board
For stepper motor control
Osclloscope
CURRENT PROBE
AMPLIFIER1
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
LV8548M Evaluation Board
Stepper Motor
Efficiency
25V-3A
5V-0.5A
-
4 channel
-
-
25V-2A
1/8/2014
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Test Procedure:
1. Connect the test setup as shown above.
2. Set it according to the following guide.
[Supply Voltage]
VCC (4 to 16V) : Power Supply for LSI
VIN (1.8 to 5.5V) : Logic “High” voltage for toggle switch
Upper Side: High (VIN)
Middle: Open, enable to external logic input
Lower Side: Low (GND)
[Toggle Switch State]
[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 , Half-step
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
Typical current waveform
IN1
IN2
IN3
IN4
(%)
100
OUTPUT
* Refer to the following waveform
IN1
IN2
IN3
IN4
(%)
100
I1
0
-100
100
I1
0
-100
100
I2
0
-100
I2
0
-100
LV8548M Full-Step VCC=12V 200pps
LV8548M Half-Step VCC=12V 200pps
T=5ms/div
IOUT1
500mA/div
T=5ms/div
IOUT1
500mA/div
VOUT1
10V/div
VOUT1
10V/div
IN1
5V/div
IN2
5V/div
IN1
5V/div
IN2
5V/div
1/8/2014
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For DC motor control
Osclloscope
CURRENT PROBE
AMPLIFIER1
PROBE
INPUT
OUTPUT
CHANNEL
1
2
3
4
DC Motor
Power supply 1
A
V
-
+
Function generator
Power supply 2
Hz
A
V
CHANNEL
1
2
-
+
Table3: Required Equipment
Equipment
Power supply1
Power supply2
Function generator
Oscilloscope
Current probe
LV8548M Evaluation Board
DC Motor
Efficiency
25V-3A
5V-0.5A
200kHz
4 channel
-
-
25V-2A
1/8/2014
3
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Test Procedure:
1. Connect the test setup as shown above.
2. Set it according to the following guide.
[Supply Voltage]
VCC (4 to 16V) : Power Supply for LSI
VIN (1.8 to 5.5V) : Logic “High” voltage for toggle switch
Upper Side: High (VIN)
Middle: Open, enable to external logic input
Lower Side: Low (GND)
[Toggle Switch State]
[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
IN1
L
L
H
L
H
IN2
L
L
L
H
H
L
H
L
H
L
L
H
H
IN3
L
IN4
L
OUT1
OFF
OFF
H
L
L
Output
OUT2
OFF
OFF
L
H
L
OFF
H
L
L
OFF
L
H
L
2CH
1CH
OUT3
OFF
OUT4
OFF
Stand-by
Stand-by
Forward
Reverse
Brake
Stand-by
Forward
Reverse
Brake
Remarks
1/8/2014
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