Upload
calin-luchian
View
5
Download
0
Embed Size (px)
Citation preview
5SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
Parameter SymbolRatings
UnitsSLA7022MU SLA7029M SMA7022MU SMA7029MMotor supply voltage VCC 46 VFET Drain-Source voltage VDSS 100 VControl supply voltage VS 46 VTTL input voltage VIN 7 VReference voltage VREF 2 VOutput current IO 1 1.5 1 1.5 A
Power dissipation PD1 4.5 (Without Heatsink) 4.0 (Without Heatsink) WPD2 35 (TC=25C) 28(TC=25C) W
Channel temperature Tch +150 CStorage temperature Tstg 40 to +150 C
Absolute Maximum Ratings
2-Phase Stepper Motor Unipolar Driver ICsSLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Excitation
(Ta=25C)
RatingsParameter Symbol SLA7022MU SLA7029M SMA7022MU SMA7029M Units
min typ max min typ max min typ max min typ max
Control supply currentIS 10 15 10 15 10 15 10 15
mACondition VS=44V VS=44V VS=44V VS=44VControl supply voltage VS 10 24 44 10 24 44 10 24 44 10 24 44 VFET Drain-Source VDSS 100 100 100 100
Vvoltage Condition VS=44V, IDSS=250 A VS=44V, IDSS=250 A VS=44V, IDSS=250 A VS=44V, IDSS=250 A
FET ON voltageVDS 0.85 0.6 0.85 0.6
VCondition ID=1A, VS=14V ID=1A, VS=14V ID=1A, VS=14V ID=1A, VS=14V
FET drain leakage currentIDSS 4 4 4 4
mACondition VDSS=100V, VS=44V VDSS=100V, VS=44V VDSS=100V, VS=44V VDSS=100V, VS=44VFET diode forward VSD 1.2 1.1 1.2 1.1
Vvoltage Condition ID=1A ID=1A ID=1A ID=1A
IIH 40 40 40 40 A
TTL input currentCondition VIH=2.4V, VS=44V VIH=2.4V, VS=44V VIH=2.4V, VS=44V VIH=2.4V, VS=44V
IIL 0.8 0.8 0.8 0.8mACondition VIL=0.4V, VS=44V VIL=0.4V, VS=44V VIL=0.4V, VS=44V VIL=0.4V, VS=44V
VIH 2 2 2 2TTL input voltage Condition ID=1A ID=1A ID=1A ID=1A
V(Active High) VIL 0.8 0.8 0.8 0.8Condition VDSS=100V VDSS=100V VDSS=100V VDSS=100VVIH 2 2 2 2
TTL input voltage Condition VDSS=100V VDSS=100V VDSS=100V VDSS=100VV
(Active Low) VIL 0.8 0.8 0.8 0.8Condition ID=1A ID=1A ID=1A ID=1A
Tr 0.5 0.5 0.5 0.5Condition VS=24V, ID=0.8A VS=24V, ID=1A VS=24V, ID=0.8A VS=24V, ID=1A
Switching timeTstg 0.7 0.7 0.7 0.7
sCondition VS=24V, ID=0.8A VS=24V, ID=1A VS=24V, ID=0.8A VS=24V, ID=1ATf 0.1 0.1 0.1 0.1
Condition VS=24V, ID=0.8A VS=24V, ID=1A VS=24V, ID=0.8A VS=24V, ID=1A
Electrical Characteristics (Ta=25C)
DC characteristics
AC cha
racteristics
6 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)
Internal Block Diagram
Diagram of Standard External Circuit (Recommended Circuit Constants)
6
Reg Reg
1 5 8
VS
14
INB
INA
7
RSA
2 3 4 12 13 11
TDA
REFA
GNDA
GNDB
REFB
TDB
RSB
9
10 15
+
+
+
+
1, 6, 10, 15pinDescription of pins
Excitation inputActive HOUT AOUT AOUT BOUT B
1pin6pin10pin15pin
Active LOUT AOUT AOUT BOUT B
8 1 6 10 15VS
RSA REFA REFB RSB GA GB7 3 13 9 4 12
C4
r6r5
r2
r1r4r3
C1 C2
TdATdB
INA
INB
INA
INB
5
14
+
VCC (46V max)
Vb (5V)
RsRsC3
11
2
Opencollector
tdA tdB
Excitation signal time chart2-phase excitation
clock 0 1 2 3 0 1INA H H L L H HINB L H H L L H
1-2 phase excitationclock 0 1 2 3 4 5 6 7 0 1 2 3INA H H H H L L L L H H H HtdA L L L H L L L H L L L HINB L L H H H H L L L L H HtdB L H L L L H L L L H L L
tdA and tdB are signals before the inverter stage.r1 : 510r2 : 100 (VR)r3 : 47kr4 : 47kr5 : 2.4kr6 : 2.4kC1 : 330 to 500pFC2 : 330 to 500pFC3 : 2200pFC4 : 2200pFRs : 1.8 typ(7022MU)
1 typ(7029M)(1 to 2W)
7SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)
External Dimensions SLA7022MU/SLA7029M (Unit: mm)
310.224.40.216.40.2
3.20.15
160
.2
130
.2
9.9
0.2 Part No.
Lot No.
3.20.153.8 4.80.21.70.1
2.450.2
R-End 6.70
.5
9.7+
10.5
(3)
0.55+0.20.1
40.71.15+0.2
0.1
14P2.030.7=28.421.0
0.65+0.20.1
31.30.2
Forming No. No.853
1 2 3 15 123 15
Forming No. No.855
14P2.030.4=28.420.8
0.65 +0.20.1
30.6
0.55
+0.2
0.1
2.20.46.30.67.50.6
4.6
0.6
1.6
0.6
Epoxy resin package
1.15 +0.20.1
(Unit: mm) External Dimensions SMA7022MU/SMA7029MA
Forming No. No.1054
310.2
Part No.Lot No.
40.22.50.2
1.450.15
6.70
.5
(9.7)
(3)
0.55+0.20.1
40.7
P2.030.114=28.42
0.65+0.20.1
1 2 3 15123 15
P2.030.114=28.42
1.160.15
30.6
0.55
+0.2
0.11.20.1
(5.9)
(4.6)
1.6
0.6
1.16+0.20.1
30
0.620.1
(7.5)
Epoxy resin package
8.5ma
x
10.20
.2
31.3+0.2
Forming No. No.1055
8 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)
Determining the Output CurrentFig. 1 shows the waveform of the output current (motor coil cur-rent). The method of determining the peak value of the outputcurrent (IO) based on this waveform is shown below.(Parameters for determining the output current IO) Vb: Reference supply voltage r1,r2: Voltage-divider resistors for the reference supply voltage RS: Current sense resistor(1) Normal rotation modeIO is determined as follows when current flows at the maximumlevel during motor rotation. (See Fig.2.)
(2) Power down modeThe circuit in Fig.3 (rx and Tr) is added in order to decrease thecoil current. IO is then determined as follows.
Equation (2) can be modified to obtain equation to determine rx.
Fig. 4 and 5 show the graphs of equations (1) and (2) respec-tively.
(NOTE)Ringing noise is produced in the current sense resistor RS whenthe MOSFET is switched ON and OFF by chopping. This noiseis also generated in feedback signals from RS which may there-fore cause the comparator to malfunction. To prevent choppingmalfunctions, r5(r6) and C3(C4) are added to act as a noise filter.
RS
C3r2
r1r6
r5
Vb(5V)
7,(9)
3,(13)
Fig. 2 Normal mode
0
Phase A
Phase A
IO
Fig. 1 Waveform of coil current (Phase A excitation ON)
RS
C3r2
r1r6
r5
Vb(5V)
7,(9)
3,(13)rx
TrPower downsignal
Fig. 3 Power down mode
4
3
2
1
00 1 2 3 4Current sense resistor RS ()
Outpu
t current IO
(A)
IO= r1+r2 RS
r1=510r2=100rx=Vb=5V
r2
Vb
Fig. 4 Output current IO vs. Current sense resistor RS Fig. 5 Output current IOPD vs. Variable current sense resistor rx
2.0
1.5
1.0
0.5
00 200 400 600 800
Variable current sense resistor rX ()
Outpu
t current IO
PD (A)
1000 1200
RS =0.5
RS =0.8RS =1
IOPD= 1+ RS
r1=510r2=100Vb=5V
1
Vbr1(r2+rX)r2 rX
Application Notes
However, when the values of these constants are increased,the response from RS to the comparator becomes slow. Hencethe value of the output current IO is somewhat higher than thecalculated value.
rX= 1 VbRs IOPD
1r1
1 1r2
................................................................ (1)IO r2r1+r2
VbRS
......................................................... (2)IOPD 1r1(r2+rX) r2 rX
VbRS
1+
9SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)
Determining the chopper frequencyDetermining TOFFThe SLA7000M and SMA7000M series are self-excited chop-pers. The chopping OFF time TOFF is fixed by r3/C1 and r4/C2connected to terminal Td.TOFF can be calculated using the following formula:
The circuit constants and the TOFF value shown below are rec-ommended.TOFF = 12s at r3=47k, C1=500pF, Vb=5V
60
50
40
30
20
10
00 2 4 6 8 10 12 14 16
15
20
25
303540
Motor coil resistance Rm ()
ON tim
e TO
N ( s
)
VCC
=24V
VCC =36V
Chop
ping
freq
uency f (k
Hz)
TOFF =12 sRS =1 Lm
=1~3ms Rm
= =r3 C1
r4 C2
47k 500pF
Fig. 6 Chopper frequency vs. Motor coil resistance
Chopper frequency vs. Supply voltage
0
f (kHz
)
VCC (V)
50
40
30
20
10
010 20 30 40 50
Motor : 23LM-C202IO = 0.8A at VCC=24VRS=1
Chopper frequency vs. Output current
0
f (kHz
)
IO (A)
50
40
30
20
10
00.2 0.4 0.6 0.8 1.0
Motor : 23LM-C202VCC=24VRS=1
TOFFr3 C1 n (1 =r4 C2 n (1 )r r2Vb
2Vb
10 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)
35
30
25
20
15
10
5
0200 500 1K
Case te
mpe
rature rise TC
a (C
)
Motor : PH265-01BMotor current IO=0.8ATa=25CVCC=24V, VS=24V2-phase excitation
Response frequency (pps)
Without heatsinkNatural cooling
TC ( 4 pin)
30
25
20
15
10
5
0200 500 1K
Case te
mpe
rature rise TC
a (C
)
Motor : PH265-01BMotor current IO=0.8ATa=25CVCC=24V, VS=24V2-phase excitation
Response frequency (pps)
Without heatsinkNatural cooling
TC ( 4 pin)
35
30
25
20
15
10
5
0200 500 1K
Case te
mpe
rature rise TC
a (C
)
Motor : PH265-01BMotor current IO=0.8ATa=25CVCC=24V, VS=24V2-phase excitation
Response frequency (pps)
Without heatsinkNatural cooling
TC ( 4 pin)
30
25
20
15
10
5
0200 500 1K
Case te
mpe
rature rise TC
a (C
)
Motor : PH265-01BMotor current IO=0.8ATa=25CVCC=24V, VS=24V2-phase excitation
Response frequency (pps)
Without heatsinkNatural cooling
TC ( 4 pin)
Thermal characteristics
SLA7022MU SLA7029M
SMA7022MU SMA7029MU
Thermal DesignAn outline of the method for calculating heat dissipation is shown below.(1)Obtain the value of PH that corresponds to the motor coil
current IO from Fig. 7 "Heat dissipation per phase PH vs. Out-put current IO."
Output current IO (A)
Hea
t diss
ipation pe
r pha
se P
H (W
)
Motor : 23LM-C004Holding mode
0 0.2 0.4 0.6 0.8 1.0
1.2
1.0
0.8
0.6
0.4
0.2
0
VCC =44V
36V
24V15V
Tja
TCa
Tj
10 2 3 4
TC
Natural coolingWithout heatsink
150
100
50
0
Total Power (W)
(C)
Fig. 7 Heat dissipation per phase PH vs. Output current IO
Fig. 8 Temperature rise
(2)The power dissipation Pdiss is obtained using the following formula.2-phase excitation: Pdiss 2PH+0.015VS (W)1-2 phase excitation: Pdiss PH+0.015VS (W)
(3)Obtain the temperature rise that corresponds to the calcu-lated value of Pdiss from Fig. 8 "Temperature rise."
1.2
1
0.8
0.6
0.4
0.2
00 0.2 0.4 0.6 0.8 1.0
Hea
t diss
ipation pe
r pha
se P
H
(W)
Output current IO (A)
36V
24V
15V
VCC
=44V
Motor : 23LM-C202Holding mode
Tja
TCa
Tj
10 2 3 4 5
TCNatural coolingWithout heatsink
150
100
50
0
Total Power (W)
(C)
SLA7022MU, ASMA7022MU
SLA7000M series
SLA7029M, SMA7029M
SMA7000M series
32
11SLA7022MU/SLA7029M/SMA7022MU/SMA7029M
SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)
0
Supp
ly curre
nt I C
C (m
A)
Supply voltage VCC (V)
500
400
300
200
100
0 10 20 30 40 50
Motor : 23LM-C2021-phase excitationHolding modeIO : Output current
IO=1A
0.4A0.2A
Supply Voltage VCC vs. Supply Current ICC
SLA7022MU, SMA7022MU
0
Supp
ly curre
nt I C
C (m
A)
Supply voltage VCC (V)
500
400
300
200
100
010 20 30 40 50
0.2A0.5A
IO=1A
Motor : 23LM-C0041-phase excitationHolding modeIO : Output current
SLA7029M, SMA7029M
100
Pull-o
ut to
rque
(kg-cm
)
Response frequency (pps)
2.0
1.5
1.0
0.5
0 5K1K500
Motor : 23LM-C202 Output current IO =0.8AMotor supply voltage VCC =24V2-phase excitation
Torque Characteristics
SLA7029M, SMA7029M
100
Pull-ou
t torqu
e (kg
-cm)
Response frequency (pps)
2.0
1.5
1.0
0.5
0 5K1K500
Motor : PX244-02 Output current IO =0.6A Motor supply voltage VCC =24V2-phase excitation
SLA7022MU, SMA7022MU