LV8860V Motor Driver IC Application Note

LV8860V
Bi-CMOS IC
Single-Phase FAN Motor Driver
Application Note
http://onsemi.com
Overview
LV8860V is a driver IC used for single-phase fan motor. High-efficiency and low-noise are realized by
reducing reactive power using Silent PWM.
The operating range of LV8860V is wide. LV8860V also corresponds to 24V. Therefore, it is optimal for office
automation equipment and factory automation equipment.
Function
 Single-phase full wave operation by Silent PWM drive
 Speed is controllable by PWM input
 Hall bias output pin
 Integrated Quick Start Circuit
 FG (rotation detection)/ RD (lock detection) output pin (open drain output)
 Integrated current limiter circuit (limit at Io=450mA with RL=0.5Ω connection, limit value is determined
based on Rf.)
 Integrated lock protector circuit and automatic recovery circuit
 Integrated thermal shut-down (TSD) circuit
Typical Applications
 Cooling fan for office automation equipment and factory automation equipment and projector.
Pin Assignment
Package Dimensions
(Top view)
Recommendation Soldering Footprint
Caution: The package dimension is a reference value,
which is not a guaranteed value
Reference Symbol
eE
e
b3
I1
Semiconductor Components Industries, LLC, 2013
December, 2013
(Unit: mm)
SSOP30(225mil)
5.80
0.65
0.32
1.00
1/27
LV8860V Application Note
Block Diagram
2/27
LV8860V Application Note
Specifications
Absolute maximum rating at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
36
V
OUT pin output current
IOUT max
0.7
A
RD/FG output pin withstand
VRD/FG max
36
V
RD/FG output maximum current
IRD/FG max
10
mA
IRGL max
5
mA
IHB max
10
mA
VPWM max
6
V
0.8
W
RGL output maximum current
HB output maximum current
PWM input pin withstand
Allowable power dissipation
Pd max
*On a specified board
Operating temperature
Topr
-40 to +95
°C
Storage temperature
Tstg
-55 to +150
°C
*Specified board: 114.3mm×76.1mm×1.6mm, fiberglass epoxy printed circuit board
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage
under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may
be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Conditions at Ta  25C
Symbol
Operating supply voltage range
VCC op1
Recommended supply voltage range
7
34
V
VCC op2
Boot guarantee supply voltage range
6
34
V
VICM
0.3
VRGL-2.0
V
SSW pin input voltage range
SSW
1
3.0
V
Input PWM frequency range
PWMF
20
50
kHz
Hall input common phase input
Conditions
Ratings
Parameter
min
typ
Unit
max
voltage range
3/27
LV8860V Application Note
Electrical Characteristics at Ta=25°C, VCC=24V
Parameter
Circuit consumption current
Symbol
Ratings
Conditions
min
typ
Unit
max
ICC
Active
2.2
3.5
mA
ICCo
Stand-by
1.7
2.7
mA
RGL pin output voltage
VRGL
4.7
5.0
5.3
V
RGH pin output voltage
VRGH
VCC-4.3
VCC-4.8
VCC-5.3
V
1.16
1.25
1.28
V
1.4
2.0
Ω
1.0
uA
225
250
mV
1.0
V
HB pin output voltage
VHB
IHB=5mA
Output ON resistance
Ron
Io=0.3A,
upper
and
lower
ON
resistance
Hall input bias current
IHIN
Current limiter
VRF
PWM pin input Low level
PWM pin input High level
PWM input minimum pulse width
RD/FG output pin Low voltage
FG output leakage current
FG comparator hysteresis width
Output ON time in Lock-detection
VPWML
0
VPWMH
2.5
TPWM
IRD/FG=3mA
IRDL/FGL
VRD/FG=24V
∆VHYS
including offset
TACT
TDET
Output ON/OFF ratio in Lock-detection
TRTO
Thermal shutdown hysteresis width
VRGL
2
VRD/FG
Output OFF time in Lock-detection
Thermal shutdown operating temperature
200
TRTO=TDET/TACT
V
uSec
0.22
0.30
V
10
uA
±5
±12
±18
mV
0.74
0.95
1.16
Sec
7.0
9.0
11.0
Sec
7.5
9.0
11.0
TSD
*Design guarantee
180
°C
∆TSD
*Design guarantee
40
°C
* Design guarantee value and no measurement were performed.
4/27
2.5
5
2
4.8
VRGL (V)
ICC (mA)
LV8860V Application Note
1.5
1
4.6
4.4
VCC = 24V
4.2
0.5
ICC_active
0
6
12
ICC_stand‐by
18
24
IRGL = 5mA
4
‐40
30
VCC (V)
Figure 1 Curcuit consumption current
vs Supply voltage
40
60
80
VCC = 24V
1.5
IHB = 5mA
1.3
Ron (Ω)
VHB (V)
20
2
1.4
1.2
1.1
1
VCC = 24V
0.5
OUT1P+OUT2N
0
1
‐40
‐20
0
20
40
60
80
0.1
Temperature (℃)
Figure 3 HB pin output voltage
vs Temperature
0.2
0.3
OUT2P+OUT1N
0.4
0.5
0.6
0.7
Iout (A)
Figure 4 Output on resistance vs Output current
700
2
IIN1, IIN2 (nA)
1.5
1
0.5
OUT1P+OUT2N
0
‐40
‐20
0
20
OUT2P+OUT1N
40
60
600
VCC = 24V
500
VIN = 0.3V
400
300
200
100
IIN1
IIN2
0
‐40
80
‐20
0
20
40
60
80
Temperature (℃)
Figure 6 Hall input vias current vs Temperature
Temperature (℃)
Figure 5 Output on resistance vs Temperature
2
0.3
1.8
0.28
1.6
0.26
VRF (V)
VPWM threshold (V)
0
Temperature (℃)
Figure 2 RGL pin output voltage
vs Temperature
1.5
Ron (Ω)
‐20
1.4
1.2
0.24
0.22
1
0.2
‐40
‐20
0
20
40
60
80
Temperature (℃)
Figure 7 PWM input threshold voltage vs Temperature
‐40
‐20
0
20
40
60
80
Temperature (℃)
Figure 8 Current limitter voltage vs Temperature
5/27
140
140
120
120
VINp-pt (mV)
VINp-p (mV)
LV8860V Application Note
100
80
60
40
100
80
60
40
20
20
0
0
1
1.5
2
2.5
‐40
3
1.5
30
1.2
25
⊿VHYS (mV)
VFGsat, VRDsat (V)
Figure 9 Voltage difference of IN1 and IN2 making Soft‐SW width vs SSW voltage
0.6
0.3
VFG
VRD
0
‐20
0
VSSW=2V
20
40
VSSW=3V
60
80
Temperature (℃)
Figure 10 Voltage difference of IN1 and IN2 making Soft‐SW width vs Temperature
VSSW (V)
0.9
VSSW=1V
20
15
10
5
0
‐40
‐20
0
20
40
60
80
Temperature (℃)
Figure 11 RD/FG output pin low voltage vs Temperature
‐40
‐20
0
20
40
60
80
Temperature (℃)
Figure 12 FG comparator hysteresis width
vs Temperature
6/27
LV8860V Application Note
Pin Functions
*On circuit board,
Pin No.
Pin name
1
OUT1
means
VCC ,
means RGL.
Description
Equivalent circuit
Output pin for motor driver
The motor coil is connected between
OUT1 (pin1) and
OUT2 (16pin).
16
OUT2
2
NC
NC pin
3
NC
NC pin
4
VCC
Power supply pin
VCC voltage is impressed. The operation voltage range is
from 7.0 to 34.0(V). The capacitor is connected to GND pin
(14pin) for stabilization.
5
RGH
Regulator voltage output pin for the upper output Tr driver
The capacitor is connected to VCC pin (3pin) for stabilization.
6
PWM
Input pin for PWM control
The PWM signal is supplied for speed control.
*OPEN: pull up to High
* When input is High  output is High
When input is Low  output is Low
7
FG
FG(rotation detection) pulse output pin
The resistor is connected to VCC pin (3pin) for detection
signal.
8
RD
RD(lock detection) signal output pin
*During rotation  output is Low
During lock output is High
The resistor is connected to VCC pin (3pin) for detection
signal.
Continued on next page.
7/27
LV8860V Application Note
Continued from preceding page.
Pin No.
Pin name
9
IN1
Description
Equivalent circuit
Hall input + pin
Hall input - pin
The Hall device outputs are connected.
If hall signal is affected by noise, the capacitor should be connected
11
IN2
between IN1 pin (9pin) and IN2 pin (11pin).
10
HB
Hall bias output pin
The voltage supply pin of Hall device is connected.
12
RGL
Regulator voltage output pin for internal circuit and lower output Tr
driver
The capacitor is connected to GND pin (14pin) for stabilization.
13
SSW
Voltage input pin for control between soft switches
The resistor is connected to for RGL or GND pin (14pin) for
adjusting soft switch width.
*OPEN: pin voltage is 2V
*Soft switch zone is changed by connecting a resistance to RGL or
GND to adjust pin voltage.
14
GND
15
RF
Ground pin
Resistive connection pin for current limiter
The resistor is connected to GND (14pin) for detection of current
value.
8/27
LV8860V Application Note
Operational Description
1. Operation Overview
LV8860V is a driver with single phase full wave drive mode which outputs the voltage to a coil based on the
position signal from a Hall device. By supplying power, the IC is turned on. As a result, the output voltage is
impressed to the coil.
FG signal is outputted according to phase switch of the coil, and RD signal is output when a motor is locked.
LV8860V incorporates speed control function with direct PWM input method. The output mode is switched
according to the signal input into a PWM pin and speed control is performed.
 When PWM input duty is 100% (DC input) or PWM pin is open, a fan rotates at full speed.
 Rotation speed is controllable because when a duty signal is input to PWM input, coil is energized by the
same duty.
 When PWM input duty is 0% or the PWM pin is shorted to GND, IC is set to standby mode, where power
supply to coil is stopped and a fan stops.
Fig.13 Operation Waveform
9/27
LV8860V Application Note
Input-Output Logic
Operating state
Rotation - drive mode
Rotation – regeneration mode
Stand-by mode
Lock protector
IN1
IN2
H
L
H
L
H
L
L
-
H
-
H
L
L
H
PWM
H
L
L
-
OUT1
OUT2
FG
RD
H
L
L
L
H
L
L
OFF
L
L
L
L
L
L
L
OFF
OFF
OFF
L
L
OFF
L
L
OFF
L
OFF
OFF
OFF
Example Wave Form (VCC = 24, □80 single phase fan motor is used)
Explanation of each wave
VIN1, VIN2: input signal from Hall device
VOUT1: output signal from OUT1 pin (1pin)
VOUT2: output signal from OUT2 pin (16pin)
VFG: output signal from FG pin (7pin), FG pin is pulled up with VCC pin
IOUT: Coil Current
VIN1
200mV/div
VIN2
200mV/div
VOUT1
20V/div
VOUT2
20V/div
VOUT1
20V/div
VOUT2
20V/div
VFG
20V/div
IOUT
0.2A/div
Fig.14OperationWaveform
10/27
LV8860V Application Note
1-1. Full-Speed drive
When PWM pin is open or input PWM signal duty is 100%, the output of LV8860V is considered “full speed
drive”.
LV8860V has adopted a new soft-switching method, with which output waveform before and after the phase
switch is obtained as shown in the following figure, where the duty changes gradually.
LV8860V Full‐Speed 5ms/div
LV8860V Full‐Speed 200us/div
VOUT1
VOUT2
VOUT1
VOUT2
VFG
VFG
IOUT
IOUT
Fig.15Waveformoffullspeeddrive
11/27
LV8860V Application Note
1-2. Speed control by PWM input
The rotation speed is controllable by PWM input into PWM pin (No.6pin).
/PWM input voltage is “Low” => Drive OFF
PWM input voltage is “High” => Drive ON
/When PWM pin is open, IC drives Duty = 100%.
/Input PWM frequency range is 20kHz – 50kHz, and Input PWM amplitude is 0V – 5V.
Input PWM signal
LV8860V Full‐Speed 5ms/div
LV8860V Speed‐Control 5ms/div
VOUT1
VOUT2
VOUT1
VOUT2
VFG
VFG
IOUT
IOUT
LV8860V Speed‐Control 20us/div
VOUT1
VOUT2
VFG
IOUT
Fig.16Waveformofspeed‐controldrive
12/27
LV8860V Application Note
1-2-Appendix1. Description of synchronous rectification
The synchronous rectification is one method for current regeneration in PWM speed control, which realizes
high efficiency and low heat generation compared to the conventional diode rectification.
The following figure explains operation of the output when synchronous rectification is performed.
The alphabet at the left lower of each figure corresponds to figure 16 of the previous section.
1) When 2 transistors, Tr 1P and Tr2N are ON,
coil current flows through the coil.
At that time, output voltages are
OUT1: Vcc – Vsat1P
OUT2: 0V + I × Rf + Vsat2N
2) When PWM signal turns to Low, Tr 1P turns
OFF to prevent penetration current.
Coil current flows through the parasite Diode
of Tr1N.
At that time, output voltages are
OUT1: 0V – VF (negative potential)
OUT2: 0V + Vsat2N
Returns to
A
3) Next, Tr1N turns ON,
Coil current flows through the Tr1N, coil,
and Tr2N. (This method is “synchronous
rectification”)
At that time, output voltages are
OUT1: 0V – Vsat1N (negative potential)
OUT2: 0V + Vsat2N
4) When PWM signal turns to High, Tr1N
turns OFF.
Coil current flows through the parasite
Diode of Tr1N.
At that time, output voltages are
OUT1: 0V – VF (negative potential)
OUT2: 0V + Vsat2N
13/27
LV8860V Application Note
1-2-Appendix2.Merit of synchronous rectification compared to the conventional diode rectification.
In this case, output voltages are
OUT1: 0V – Vsat1N (negative potential)
OUT2: 0V + Vsat2N
In this case, output voltages are
OUT1: 0V – VF (negative potential)
OUT2: 0V + Vsat2N
When the ON resistance of the transistor used for regeneration (Tr1N) is low and Vsat1N (Tr1N * regenerated
current) is lower than VF of the diode used for diode regeneration, the power dissipation for regeneration is
small. Hence, efficiency becomes high and low heat generation is realized.
Example: Compare the power dissipation in Tr1N during regeneration where Iout = 0.3A, Ron = 0.5Ω, VF =
0.7V:
Synchronous rectification Ptr1n = Iout × Vosat1N = 0.3 × (0.3 × 0.5) = 0.045(W)
Diode regeneration Ptr1n = Iout × VF = 0.3 × 0.7 = 0.21(W)
Heat generation of synchronous rectification is about 20% of that of diode regeneration at Tr1N.
14/27
LV8860V Application Note
1-3. Stand-by mode
When PWM input duty is 0% or PWM pin is connected to GND, the IC runs stand-by mode.
The low signal detection time of stand-by mode is about 400us.
In stand-by mode, motor is stopped. The motor starts rotation again as soon as PWM-High signal is detected.
Fig.17OperationWaveformofStand‐bymode
15/27
LV8860V Application Note
2. Switching method
Outline
LV8860V has silent PWM drive new switching method which realizes high efficiency and silent drive.
The characteristic waveform in silent PWM mode at phase switch is shown in figure 18.
Compared to the conventional switching method, current switch is smooth; therefore, the operation is silent
and efficient.
The soft switch width before and after phase change is adjustable. As the following figure18 shows, by
adjusting soft switch width, current change is optimized. As a result, we can get the following merits.
1. Small kickback waveform
2. Silent drive
3. Higher driving efficiency
soft switch width
(Duty change area)
High
Low
High
DUTY
VOUT1
VOUT2
IOUT = 0A
IOUT
Fig.18WaveformofOUTPUT1/2
withsilentPWMdriveatphasechange
Comparison of silent PWM soft switching with conventional switching method
VOUT1
VOUT1
VOUT2
VOUT2
IOUT
IOUT
VOUT1
VOUT1
VOUT2
VOUT2
IOUT
IOUT
Fig.19 OperationWaveform
Upper;conventionalswitchingmethod
Lower:PWMsoftswitching(LV8860V)
16/27
LV8860V Application Note
2-1 How to set soft-switch pin
The width of soft switch before and after switching is controlled by SSW (No.13pin) voltage.
Timing of current changes at phase change is controllable by adjusting soft-switch width.
This way, reactive current is reduced and motor is driven efficiently.
Fig.20Howtochangesoft‐switchwidth
The width of soft-switch before and after switching is controlled by SSW. Therefore, it is adjustable by
connecting an external resistance to SSW. Adjustable voltage range is between 1V and 3V.
Input SSW voltage range is 1V to 3V.
When SSW voltage is High, soft-switch width is wide.
When SSW voltage is Low, soft-switch width is narrow.
*The evaluation board is open.
< Configuration of SSW Voltage >
A. *Without adjustment (SSW is open * this is a reference width of soft switch) with IC’s internal
resistance:
VSSW = 5 × 60k / (90k + 60k) = 2V
B. *To widen width of soft switch (connect Rw (resistance) between RGL and SSW.)
VSSW = 5 × 60k / {60k + 1 / (1/Rw + 1/90k)}
(ex.) Connect Rw = 75kΩ
VSSW = 5 × 60k / {60k + 1 / (1/75k + 1/90k)} = 2.97V
C. *To narrow soft switch width (connect Rn (resistance) between SSW and GND.)
VSSW = 5 × [{1 / (1/Rn + 1/60k)} / {90k + 1 / (1/Rn + 1/60k)}]
(ex.) Connect Rn = 39kΩ
VSSW = 5 × [{1 / (1/39k + 1/60k)} / {90k + 1 / (1/39k + 1/60k)}] = 1.04V
17/27
LV8860V Application Note
2-2. Effect of soft switching width adjustment
LV8860V Full‐Speed 5ms/div
LV8860V Full‐Speed 200us/div
VOUT1
VOUT2
VOUT1
VOUT2
VFG
VFG
IOUT
IOUT
* Because the output current at phase switch is smooth, the operation is efficient.
If current switch is not smooth when SSW pin is open, connect a resistor to SSW pin to adjust SSW voltage for
an optimum current waveform.
Example: If the direction of coil current has not been changed at phase switch
VSSW = 2V
VSSW = 3V
LV8860V Full‐Speed 100us/div
VOUT waveform has kickback
LV8860V Full‐Speed 100us/div
VOUT1
VOUT2
VOUT1
VOUT2
VFG
VFG
IOUT
IOUT
VOUT waveform has no kickback
Fig.21Efficiencyofadjustingsoft‐switchwidth
18/27
LV8860V Application Note
2-3. Reference amplitude of input signal
The width of soft switch in LV8860V is controlled by input signal, IN1/IN2. The external SSW voltage (VSSW)
adjusts the difference of input voltage (VINp-p) that creates width of soft switch. The range of SSW input
voltage is between 1V and 3V.
Referential difference of input signal amplitude in VSSW range:
*When VSSW = 1V (min), VINp-p = 30 mV
--> make sure to input Hall signal with amplitude difference greater than 30mV.
*When VSSW = 2V (open), VINp-p = 90 mV
--> make sure to input Hall signal with amplitude difference greater than 90mV.
*When VSSW = 3V (max), VINp-p = 150 mV
--> make sure to input Hall signal with amplitude difference greater than 150mV.
When input signal amplitude is greater than VINp-p (as shown in Fig. A below)
Width of soft switch is defined as shown in Fig. A.
When input signal amplitude is less than VINp-p. (as shown in Fig. B below).
Since input signal is within the range of VINp-p in all rotations, the entire zone is the soft switch zone.
Consequently, IC does not operate properly.
For such reason, make sure to input Hall signal with enough amplitude difference to SSW setting value so
that IC operates properly.
Fig.22Reference amplitude of input signal
19/27
LV8860V Application Note
3. Protective Function
Outline
3-1. Current limiter
*The current limiter is activated when the current detection resistor voltage exceeds 225mV between RF
(No.15pin) and GND (No.14pin).
When the current limiter is active, LV8860V turns to current regeneration mode and consumes the redundant
current; hence, coil current does not flow any higher than the set value. After operating current regeneration
for twice the inner clock (typ20us at normal temperature), LV8860V returns to normal operation mode.
The waveform during current limiter operation is as follows. Only the Rf resistor value has been changed.
<Calculating equation>
Iolim = Vlim / Rf
Iolim: setting limiter value
Vlim: setup voltage (TYP 225mV)
Rf: resistance value between RF and GND
Where Rf=0.5Ω, current limiter is activated at Iolim=450mA
(Iolim = 225mV / 0.5Ω = 450mA).
VOUT1
VOUT2
Limiter
Line
VFG
ICC
0.1A/div
Rf=0.5Ω,Iolim=225m/0.5=450(mA)
*CurrentLimiterisnotoperating
VOUT1
VOUT2
VOUT1
VOUT2
VFG
VFG
ICC
0.1A/div
ICC
0.1A/div
Limiter
Line
Rf=1Ω,Iolim=225m/1=225(mA)
*CurrentLimiterisoperating
VOUT1
VOUT2
Limiter
Line
VOUT1
VOUT2
VFG
VFG
ICC
0.1A/div
ICC
0.1A/div
Rf=2Ω,Iolim=225m/2=112.5(mA)
*CurrentLimiterisoperating
Fig.23CurrentLimiteroperationwaveform
20/27
LV8860V Application Note
3-2. Lock protector circuit and automatic recovery circuit
This IC incorporates lock protector circuit and automatic recovery circuit.
If a motor is locked, lock protector function is turned on to prevent motor from destruction.
The lock protector repeats conduction mode for approximately 0.95sec and non-conduction mode for
approximately 9.0sec at normal temperature.
If the lock protector is active during conduction, the IC is set to non-conduction mode again.
The above operations are repeated until lock protector is cancelled.
When the lock protector is active, RD signal level is High.
Fig.24 Lockprotector operationwaveform
3-3. Thermal shutdown function
This IC includes thermal shutdown circuit.
The thermal shutdown circuit is incorporated and the output is turned off when junction temperature Tj exceeds
180C. As the temperature falls by hysteresis, the output turned on again (automatic restoration).
The thermal shutdown circuit does not guarantee the protection of the final product because it operates when
the temperature exceed the junction temperature of Tjmax = 150C.
Thermal shutdown temperature = 180C (typ)
21/27
LV8860V Application Note
Application Circuit Example
Figure 25. Sample Application Circuit
*1
*2
*3
*4
*5
*6
*7
When diode Di is used to prevent destruction of IC from reverse connection, make sure to implement
capacitor Cr to secure regenerative current route.
If kickback at a phase change is greater, insert zener diode between GND and VCC or implement the
larger capacitor between GND and VCC mentioned in *1.
Make sure to implement enough capacitance 0.1uF or greater between RGH pin and VCC pin for stable
performance.
Make sure to implement enough capacitance 0.1uF or higher between RGL pin and GND pin for stable
performance.
FG pin and RD pin are open drain output. Keep the pins open when unused.
The current limiter is activated when the current detection resistor voltage exceeds 225mV between RF
and GND.
Where RL=0.5Ω, current limiter is activated at Io=450mA. Setting is made using Rf resistance.
Hall element outputs stable hall signal with good temperature characteristic when it is biased with
constant voltage from HB pin. If you wish to alleviate heating of IC, do not use HB pin. When you do not
use this Pin (Pin HB), pull down with resistor of around 10kΩ (recommended).
22/27
LV8860V Application Note
Evaluation Board Manual
1. Evaluation Board circuit diagram
Bill of Materials for LV8860V Evaluation Board
Designator
Qty
IC1
1
C1
1
C2,C3
2
R1
Description
Motor
Driver
VM
Bypass
capacitor
Value
Tol
Footprint
Manufacturer
Manufacturer
Part Number
Substitution
Allowed
Lead
Free
SSOP16
(225mil)
ON
Semiconductor
LV8860V
No
Yes
GRM21BR
71H105KA
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1µF
±10%
0805
Murata
capacitor
0.1uF
±10%
1608
Murata
1
resistor
1Ω
±5%
0603
KOA
R2,R3
2
resistor
10kΩ
±5%
1608
KOA
TP1-TP12
8
Test
points
MAC8
GRM188B3
1H104KA9
2
RK73B1JT
TD1R0J
RK73B1JT
103
ST-1-3
23/27
LV8860V Application Note
Evaluation Board PCB Design
45mm
45mm
45mm
(Top side)
(Back side)
Allowable power dissipation
Allowable Power dissipation , Pdmax (W)
Specified circuit board: 45mm x 45mm x 1.6mm, glass epoxy 2-layer board
2.0 1.70 1.5 1.15 1.0 0.61 0.54 0.41 0.5 0.0 ‐40
0
40
80
120
Ambient temperature , Ta (℃ )
24/27
LV8860V Application Note
2. Motor drive
1. Connect a motor to OUT1, OUT2, IN1, IN2, HB and GND.
2. Connect the motor power supply to VCC, and connect the GND line to GND.
3. Connect the PWM signal supply to PWM if speed control is needed.
4. Drive motor to supply voltage to VCC.
5. Motor speed is controllable by adjusting duty of PWM signal.
25/27
LV8860V Application Note
Caution for layout
 Power supply connection terminal [VCC]
 VCC is the only power supply.
The regulator voltage RGL (typ 5V) is the internally generated control power supply.
 Make sure that supply voltage does not exceed the absolute maximum rating under no circumstance.
Noncompliance can ve the cause of IC destruction and degradation.
 Caution is required for VCC supply voltage because this IC performs switching.
The bypass capacitor of the VCC power supply should be close to the IC as much as possible to stabilize
voltage. Also if you intend to use large current or back EMF is high, please augment enough capacitance.
 GND terminal [GND]
 GND terminal is 0V, hence pattern layout should be in low impedance. Since high current flows into GND,
GND terminal should be connected independently.
 Internal power supply regulator terminal [RGL, RGH]
 RGL is the control power supply for logic. (typ 5V).
RGH is the gate voltage power supply for output Pch-Tr (typ VCC-4.5V).
 When VCC is energized, the voltage is impressed to RGL and RGH.
 Connect a capacitor to RGL and RGH respectively to stabilize internal power supply.
(Recommended value: 0.1uF or higher)
 PWM signal input terminal [PWM]
 PWM signal input could be the cause of noise. Hence, caution is required for pattern layout.
 OUT terminal [OUT1, OUT2]
 During PWM operation, VOUT terminal could be the cause of noise. Hence, caution is required for pattern
layout.
 Since motor current flows into OUT terminals, they should be connected at low impedance.
 Output voltage may boost due to back EMF. Make sure that the voltage does not exceed the absolute MAX
ratings under no circumstance. Noncompliance can be the cause of IC destruction and degradation.
 Current sense resistor connection terminal [RF]
 Since motor current flows from RF to GND line, it should be connected independently at low impedance.
 NC terminal
 NC terminal is not connected to the internal circuit of the IC.
 Use NC terminal to keep the layout for power supply line and GND line as fat and short as possible
26/27
LV8860V Application Note
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number
of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at
www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no
warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the
application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts.
SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as
components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which
the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any
such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors
harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or
death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the
part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
27/27