Evaluation Board for
Motor Driver, Single-phase, PWM,
Full-wave, BLDC Motor
Overview
This evaluation board is designed to provide an easy and quick development
platform for single-phase BLDC motor control applications, using the fol-
lowing devices.
LV88551, LV88561, LV88563
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These devices have the closed loop controller for motor rotation speed. And,
potentiometers are provided on this board to configure the mini-
mum/maximum target speed, the speed curve against the input PWM duty
cycle, and some other parameters/options. The potentiometers might be useful
for tuning these parameters and options, otherwise fixed resistors must be
removed and re-soldered.
Setting with fixed resistors is also applicable by disconnecting the potenti-
ometers.
USER GUIDE
LV88551JAGEVB
LV88551RGEVB
LV88561JAGEVB
LV88561RGEVB
LV88563JAGEVB
.
Quick start
The evaluation board is programmed to work standalone without PC. The
following operation allows the operation of most motors with the default
parameters that are preloaded into the device.
step 1. Connect a motor to J3
step 2. Connect PWM signal to the pin labeled ‘PWM’
step 3. Connect a power supply to J4 (J5 is provided optionally for low
power application less than 4A).
step 4. Turn on power supply
or
The information herein is subject to be change without notice.
© Semiconductor Components Industries, LLC, 2015
1
April 2018- Rev. P0
Publication Order Number:
TBD
Register Configurable Single-phase Motor Driver Evaluation Kit
HARDWARE DESCRIPTION
Name and Function
1.
2.
3.
4.
5.
6.
7.
8.
Evaluation board
Connector J4
Connector J5
Connector J3
Pin PWM
Pin FG
IC U1 (or U2)
FETs T1 and T2
The main board
Main power connector
Optional power jack
Motor windings and signals related Hall
PWM input
FG output
A dial to tweak the command PWM duty cycle for speed control
Output power FET arrays
6
5
7
1
4
2
3
8
Figure 1 Connectors and key parts
Power supply
Motor
J4 is the main power supply connector. The outputs of a
power supplier will be connected to this connector. For
LV88551EVB, the POWER pin voltage accepts up to
18V. However, for LV88561EVB and LV88563EVB,
POWER pin for the operation is from 24V to 48V.
J3 is the motor connector.
Pin #
1
2
3
4
5
6
silk label
OUT2
OUT1
IN2
IN1
GND
HB
connected to
motor winding 2
motor winding 1
Hall signal +
Hall signal −
Ground
Hall bias
+
Figure 2 Main power
J5 is an optional connector for a power supply. Low
power is assumed (less than 4A).
-
HB
GND
IN1
IN2
OUT1
OUT2
Figure
4
J3 Motor Connector
Figure 3 Power Connector Polarity
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2
Register Configurable Single-phase Motor Driver Evaluation Kit
Hall sensor or Hall IC
These devices need a Hall sensor or Hall IC to detect the
commutation timing. IN1 and IN2 pins are Hall signal
Parameter setting
PIX
PIZ
RSA
RSB
input pins. This EVB has Hall sensor and in this case,
the resistor R38-R40 should be “OPEN”. However, in
case of using Hall IC, they should be 10kohm.
PIX
PIZ
RSA
This EVB can use for evaluation at stand-alone state.
The AD converter parameters (assigned to the pins;
RSA, RSB, PIX, PIZ, LAI, LAG, SFS), can be set by
either analog potentiometers or register dividers.
Setting pin
Resistor and
jumper
R13
R14
RO2
RO4
R15
R16
RO5
RO7
R17
R18
RO8
RO9
R19
R20
RO10
RO12
R21
R22
RO13
RO14
R23
R24
RO15
RO17
R25
R26
RO18
RO20
Potentiometer
The following table shows resistor and jumper setting
combination.
Fixed resistor
divider
Resistor
Resistor
Open
Open
Resistor
Resistor
Open
Open
Resistor
Resistor
Open
Open
Resistor
Resistor
Open
Open
Resistor
Resistor
Open
Open
Resistor
Resistor
Open
Open
Resistor
Resistor
Open
Open
Digital potentiometer IC*
1
PIX
PIZ
RSA
RSB
SFS
LAG
LAI
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
Open
Open
Open
Short
*1: not supported in this version
*2: RO3, RO6, RO11, RO16 and RO19 are for “ON INTERNAL USE”, and are kept “Open”.
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3
Register Configurable Single-phase Motor Driver Evaluation Kit
TYPICAL OPERATION
Overall tuning procedure
1.
2.
3.
4.
5.
setup fan, power supply, pulse generator (for PWM
duty cycle input)
set setting pin voltage with either potentiometer or
resistor pair
Turn-on power supply
Evaluate motor
Repeat from step 2, until appropriate evaluation
result obtained
The configuration is loaded right after power-on from
off. Therefore, power off/on cycle is required every
time the parameters are changed.
Waveform example
Below is the example waveform of LV88561JA with
various Lead Angle Settings.
The EVB condition is;
VIN=48V
2000RPM setting (PWM=100%)
Lead Angle setting (LAG ; 0 deg., LAI ; 0 deg.
Lead Angle setting (LAG ;
+9.975deg.,
LAI ; 0 deg.
FG
FG
OUT1
OUT1
OUT2
OUT2
Icoil
Icoil
Lead Angle setting (LAG ;
-9.975deg.,
LAI ; 0 deg.)
FG
OUT1
OUT2
Icoil
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4
Register Configurable Single-phase Motor Driver Evaluation Kit
APPENDIX A SCHEMATIC
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5
FPGA/CPLD
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