SLA7021M.pdf 데이터시트 (총 10 페이지) - 파일 다운로드 SLA7021M 데이타시트 다운로드

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Unipolar Driver ICs
SLA7020M
SLA7021M WITH MOSFETs
s Ratings
Absolute
maximum
ratings
Type No.
SLA7020M
SLA7021M
Motor supply
Voltage
(V)
VCC
FET output
breakdown
voltage
(V)
VDS
46 100
Control
voltage
(V)
VS
32
s Characteristics (1) DC Characteristics
TTL input
voltage
(V)
VIN
7
Reference
voltage
(V)
VREF
2
Output
current
(A)
IO
1.5
3
Power
Channel
Storage
dissipation temperature temperature
(W) (°C) (°C)
PD Tch Tstg
4.5 (No Fin) 150 –40 to +150
Electrical
charac-
teristics
Control
current
(mA)
Control
voltage
(V)
Type No.
SLA7020M
SLA7021M
VS = 30V
IS VS
min typ max min typ max
5.5 10 15 10 19 30
FET turn-on voltage
(V)
(7020M) ID =1A, VS =14V
(7021M) ID =3A, VS =14V
VDS
min typ max
0.6
0.85
FET drain
leak current
(mA)
TTL input
current
(µA)
TTL input
current
(mA)
TTL input
voltage
(OUT)
(V)
TTL input
voltage
(V)
TTL input
voltage
(OUT)
(V)
TTL input
voltage
(V)
VDSS = 100V
VS = 30V
VIH = 2.4V
VS = 30V
VIL = 0.4V
VS = 30V
ID = 1A
VDSS = 100V VDSS = 100V
ID = 1A
IDSS
IIH
IIL VIH VIL VIH VIL
min typ max min typ max min typ max min typ max min typ max min typ max min typ max
4 40 –0.8 2.0
0.8 2.0
0.8
(2) AC Characteristics
Electrical FET diode
Switching time
charac- forward voltage
teristics
(V)
(µs)
(7020M) ISD = 1A
(7021M) ISD = 3A
VS = 24V
ID = 1A
VSD
Tr Tstg
Tf
Type No. min typ max min typ max min typ max min typ max
SLA7020M
SLA7021M
1.1 0.5 0.7 0.1
2.3
12

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SLA7020M and SLA7021M
s Block diagram
Reference voltage
Vb
r1
R·C for setting
chopper OFF
r3/r4
Auxiliary Excitation
power supply signal
r2
time
C1/C2
R·C for protection
against chopping
malfunctions
r5/r6
C3/C4
REF Current peak
detector
circuit
Td VS
IN
Chopper OFF
time control
circuit
Excitation signal
transfer circuit
Motor main
power supply
VCC
Motor
OUT
OUT
Current control and
counter EMF
canceller circuit
GND
Da/Db
RS
Current detection resistor
RS
s Internal circuit diagram (enclosed with chain line)
61
5
VCC
Vs=10~30V
+
8
Reg Reg
14
+
–+
+
+–
10 15
7
23 4
12 13 11
9
RS
Da C3 r3
r1
r5
C1
r2 r6
Vb(5V)
r4 C4
C2
Db
RS
13

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SLA7020M and SLA7021M
s Diagram of standard external circuit (Recommended circuit constants)
VCC (46V max)
VS (10~30V)
VREF (5V)
8 1 6 10 15
r3 r4
VS OUTA OUTA OUTB OUTB
r1 INA 5
2 TdA
11 TdB
SLA7020M
SLA7021M
INB 14
C1 C2
r2
RSA REFA REFB RSB GA GB
7 3 13 9 4 12
Open
collector
Da
Rs
C3
r5
C4 Db
r6
Rs
INA
INB
Excitation signal time chart
2-phase excitation
clock 0 1 2 3 0 1
INA H H L L H H
INB L H H L L H
1-2 phase excitation
clock 0 1 2 3 4 5 6 7 0 1 2 3
INA H H H H L L L L H H H H
tdA L L L H L L L H L L L H
INB L L H H H H L L L L H H
tdB L H L L L H L L L H L L
• tdA and tdB are signals before the inverter stage.
r1 510
r2 100(VR)
r3 47k
r4 47k
r5 2.4k
r6 2.4k
C1 470pF
C2 470pF
C3 2200pF
C4 2200pF
Da. Db
Rs
7020M
EK03
1typ
7021M
RK34
0.68typ
tdA tdB
s External dimensions
φ 3.2±0.15
31±0.2
24.4±0.2
16.4±0.2
φ 3.2±0.15×3.8
4.8±0.2
1.7±0.1
Type No.
Lot No.
0.65
+0.2
–0.1
1.15
+0.2
–0.1
14×P2.03±0.7=28.42±1.0
31.3±0.2
R-End
2.45±0.2
0.55
+0.2
–0.1
4±0.7
(Unit: mm)
Epoxy resin package
0.65
+0.2
–0.1
1.15
+0.2
–0.1
14×P2.03±0.4=28.42±0.8
2.2±0.4
6.3±0.6
7.5±0.6
1 2 3 · · · · · · · 15
Forming number No. 853
12 3 · · · · · · · 15
Forming number No. 855
14

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SLA7024M, SLA7026M, SLA7027MU, SLA7022MU, SLA7029M,
SMA7022MU, SMA7029M, SLA7020M, SLA7021M and SDK03M
Application Note
s Determining the output current
Fig. 1 shows the waveform of the output current (motor coil
current). The method of determining the peak value (lo) of
the output current based on this waveform is shown below.
<Parameters for determining the output current lo>
Vb : Reference supply voltage
r1, r2 : Voltage-divider resistors for the reference supply
voltage
Rs : Current detection resistor
To determine rx, equation w can be modified to obtain
equation e.
rx =.. 1
r1
1
Vb
1
–1 –
Rs•lOPD
r2
.............................. e
(1) Normal rotation mode
lo is determined as follows when current flows at the
maximum level during motor rotation. See Fig. 2, 3 and
4.
lo =..
r2 Vb
r1+r2 Rs
...................................................
q
(2) Power down mode
The circuits in Fig. 5, 6 and 7 (rx and Tr) are added in
order to decrease the coil current. lo is then determined
as follows.
IOPD =..
1+
1
r1(r2+rx)
Vb
Rs
r2•rx
....................................... w
Fig. 3 Circuit for fixing the coil current
Vb(5V)
r1
r2
r6
r5
C3
3,(14)
SLA7024M
SLA7026M
SLA7027MU
9,(10)
RS
Fig. 1 Waveform of coil current (Phase A excitation ON)
Phase A
0
Phase A
IO
Fig. 4 Circuit for fixing the coil current
Vb(5V)
r1
r2
r6
r5
C3
SDK03M
3
10 13 15
RS
Fig. 2 Circuit for fixing the coil current
Vb(5V)
r1
r2
SLA7022MU
r6 SLA7029M
SMA7022MU
r5
SMA7029M
3,(13) SLA7020M
C3 SLA7021M
7,(9)
RS
Fig. 5 Circuit for fixing the coil current
Vb(5V)
r1
Power down
signal
rX r2
Tr
SLA7022MU
SLA7029M
r6 SMA7022MU
SMA7029M
r5
3,(13)
SLA7020M
SLA7021M
C3 7,(9)
RS
17

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SLA7024M, SLA7026M, SLA7027MU, SLA7022MU, SLA7029M,
SMA7022MU, SMA7029M, SLA7020M, SLA7021M and SDK03M
Application Note
Fig. 6 Circuit for fixing the coil current
Vb(5V)
r1
SLA7024M
SLA7026M
r6
r5
3,(14) SLA7027MU
Fig. 9 Output current lOPD vs. Variable current resistor rx
SLA7024M, SLA7026M, SLA7029M, SLA7027MU, SLA7022MU,
SLA7020M, SLA7021M, SMA7029M, SMA7022MU, SDK03M
2
Power down
signal
rX r2
Tr
9,(10)
C3
Fig. 7 Circuit for fixing the coil current
Vb(5V)
r1
Power down
signal
rX r2
Tr
r6 SDK03M
r5
3
C3 10 13 15
RS
Fig. 8 and 9 show the graphs of equations q and w,
respectively.
1.5 RS =0.5
1
0.5
00
RS =0.8
RS =1
IOPD=
1
1+r1r(2r2· +rrXX)
· Vb
RS
r1=510
r2=100
Vb=5V
2.0 4.0 6.0 8.00 1000 1200
Variable current resistor rX ()
NOTE:
Ringing noise is produced in the current detection resistor
Rs when the MOSFET is switched ON and OFF through
chopping. This noise is also generated in feedback signals
from Rs which may therefore causes the comparator to
malfunction.
To prevent chopping malfunctions, r5(r6) and C3(C4) are
added in order to act as noise filter.
However, when the values of these constants are increased,
the response from Rs to the comparator becomes slow.
Hence, the value of the output current lo is higher to some
extent than the computed value.
Fig. 8 Output current Io vs. Current detection resistor Rs
SLA7024M, SLA7026M, SLA7029M, SLA7027MU,
SLA7022MU, SLA7020M, SLA7021M, SMA7029M,
4 SMA7022MU, SDK03M
3
IO= r1r+2 r2·
Vb
RS
r1=510
2
r2=100
rx=
Vb=5V
1
0
01234
Current detection resistor RS ()
18