SLA703xM Datasheet

SLA7032M/SLA7033M
2-Phase/1-2 Phase Excitation
2-Phase Stepper Motor Unipolar Driver ICs
■Absolute Maximum Ratings
Parameter
(Ta=25°C)
Ratings
Symbol
Motor supply voltage
Control supply voltage
FET Drain-Source voltage
TTL input voltage
SYNC terminal voltage
Reference voltage
Sense voltage
Output current
SLA7032M
VCC
VS
V DSS
VIN
V SYNC
V REF
VRS
IO
P D1
P D2
Tch
Tstg
Power dissipation
Channel temperature
Storage temperature
Units
SLA7033M
46
46
100
−0.3 to +7
−0.3 to +7
−0.3 to +7
−5 to +7
V
V
V
V
1.5
V
V
A
W
W
°C
°C
3
4.5 (Without Heatsink)
35 (Tc = 25°C)
+150
−40 to +150
■Electrical Characteristics
Ratings
Parameter
Symbol
min
Control supply current
Control supply voltage
FET Drain-Source
voltage
FET ON voltage
FET diode forward voltage
FET drain leakage current
DC characteristics
OUT
IN terminal
OUT
Input
current
Input
voltage
SYNC terminal
Input
current¨
Input
current
REF terminal
Input
current
AC characteristics
Internal
resistance
28
Switching time
Chopping OFF time
SLA7032M/SLA7033M
IS
Condition
VS
VDSS
Condition
VDS
Condition
VSD
Condition
10
100
SLA7032M
typ
10
VS=44V
24
max
15
min
44
10
100
V S=44V, IDSS=250µA
SLA7033M
typ
10
V S=44V
24
Units
max
15
44
0.6
0.85
ID=3A, VS =14V
1.1
2.3
ISD =1A
ISD=3A
IDSS
250
Condition
VDSS=100V, VS=44V
VIH
2.0
Condition
ID=1A
VIL
0.8
Condition
VDSS=100V
VIH
2.0
Condition
VDSS=100V
VIL
0.8
Condition
ID=1A
II
±1
Condition
VS =44V, V I=0 or 5V
VSYNC
4.0
Condition
Synchronous chopping mode
VSYNC
0.8
Condition
Asynchronous chopping mode
ISYNC
0.1
Condition
VS=44V, VYS=5V
ISYNC
−0.1
Condition
VS=44V, VYS=0V
VREF
0
2.0
Condition
Reference voltage input
VREF
4.0
5.5
Condition
Output FET OFF
IREF
±1
Condition
No synchronous trigger
RREF
40
Condition Resistance between GND and REF terminal at synchronous trigger
Tr
0.5
Condition
VS =24V, ID=1A
Tstg
0.7
Condition
VS =24V, ID=1A
Tf
0.1
Condition
VS =24V, ID=1A
TOFF
12
Condition
VS=24V
V
V
VS =44V, IDSS=250 µA
ID=1A, VS =14V
mA
250
V DSS=100V, VS =44V
V
V
µA
2.0
ID=3A
0.8
V
VDSS=100V
2.0
VDSS=100V
0.8
V
ID=3A
±1
VS=44V, VI =0 or 5V
µA
4.0
Synchronous chopping mode
0.8
V
Asynchronous chopping mode
0.1
V S=44V, VYS=5V
−0.1
mA
V S=44V, VYS=0V
0
2.0
Reference voltage input
4.0
5.5
V
Output FET OFF
±1
No synchronous trigger
40
Resistance between GND and REF terminal at synchronous trigger
0.5
V S=24V, ID=1A
0.7
V S=24V, ID=1A
0.1
V S=24V, ID=1A
12
V S=24V
µA
Ω
µs
µs
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
SLA7032M/SLA7033M
■Internal Block Diagram
17
16
11
IN B
12
IN B
7
Vs B
5
Vs A
6
IN A
8
IN A
1
18
1, 8, 11, 18pin
Description of pins
Reg.
Chopping
blanking timer
(5 µ s typ)
Oscillator
MOSFET
gate drive
circuit
Chopping
OFF timer
(12 µ s typ)
Chopping
blanking timer
(5 µ s typ)
+
+
−
−
MOSFET
gate drive
circuit
Chopping
OFF timer
(12 µ s typ)
14
13
Rs B
GB
15
SYNC B
3
REF B
GA
4
REF A
Synchronous
chopping
circuit
SYNC A
Rs A
2
1pin
8pin
11pin
18pin
Oscillator
Synchronous
chopping
circuit
9
Excitation input
Active H
Active L
OUT A
OUT A
OUT A
OUT A
OUT B
OUT B
OUT B
OUT B
Reg.
10
■Diagram of Standard External Circuit (Recommended Circuit Constants)
Active High
Excitation signal time chart
2-phase excitation
Vcc (46Vmax)
clock
IN A
IN A
IN B
IN B
+
7
12
VsA
2
Vb (5V)
8
VsB
1
18
11
OUTA OUTA OUTB OUTB
SYNC A
SLA7032M
SLA7033M
13
SYNC B
INA 6
INA
INA 5
INA
INB 17
INB
INB 16
INB
0
H
L
H
L
1
L
H
H
L
2
L
H
L
H
3
H
L
L
H
0
H
L
H
L
r1 : 4kΩ
r2 : 1kΩ(VR)
R s : 1Ω typ(7032M)
(1 to 2W)
0.68Ω typ(7033M)
1
L
H
H
L
Active
High
1-2 phase excitation
RsA
r1
REFA REFB RsB
3
9
14
GA
10
4
Rs
GB
clock
IN A
IN A
IN B
IN B
15
Rs
r2
0
H
L
L
L
1
H
L
H
L
2
L
L
H
L
3
L
H
H
L
4
L
H
L
L
5
L
H
L
H
6
L
L
L
H
7
H
L
L
H
0
H
L
L
L
1
H
L
H
L
2
L
L
H
L
3
L
H
H
L
Active Low
Excitation signal time chart
2-phase excitation
Vcc (46Vmax)
clock
IN A
IN A
IN B
IN B
+
7
VsA
2
Vb (5V)
13
8
VsB
1
18
11
OUTA OUTA OUTB OUTB
SYNC A
SLA7032M
SLA7033M
SYNC B
RsA
r1
9
Rs
r2
12
REFA REFB RsB
3
14
GA
10
4
Rs
INA 6
INA
INA 5
INA
INB 17
INB
INB 16
INB
GB
15
0
L
H
L
H
1
H
L
L
H
2
H
L
H
L
3
L
H
H
L
0
L
H
L
H
r1 : 4kΩ
r2 : 1kΩ(VR)
R s : 1Ω typ(7032M)
(1 to 2W) 0.68Ω typ(7033M)
1
H
L
L
H
Active
Low
1-2 phase excitation
clock
IN A
IN A
IN B
IN B
0
L
H
H
H
1
L
H
L
H
2
H
H
L
H
3
H
L
L
H
4
H
L
H
H
5
H
L
H
L
6
H
H
H
L
7
L
H
H
L
0
L
H
H
H
1
L
H
L
H
2
H
H
L
H
3
H
L
L
H
SLA7032M/SLA7033M
29
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
SLA7032M/SLA7033M
■External Dimensions
+0.2
+0.2
0.65 –0.1
1 –0.1
17×P1.68±0.4=28.56±1
+0.2
+0.2
0.65 –0.1
1 –0.1
+0.2
0.55 –0.1
4±0.7
2.2±0.6
6±0.6
7.5±0.6
17×P1.68±0.4=28.56±1
31.3±0.2
1 2 3 · · · · · · · 18
Forming No. No.871
30
SLA7032M/SLA7033M
123 · · · · · · · 18
Forming No. No.872
+0.2
4.6 ±0.6
+1
(3)
R-End
3 ±0.6
2.45±0.2
0.55 –0.1
1.6 ±0.6
3.
4.
5.
Part No.
Lot No.
4.8±0.2
1.7±0.1
6.7±0.5
9.9 ±0.2
16 ±0.2
φ 3.2±0.15×3.8
9.7 –0.5
31±0.2
24.4±0.2
16.4±0.2
φ 3.2±0.15
13 ±0.2
(Unit: mm)
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
SLA7032M/SLA7033M
Application Notes
■Outline
SLA7032M (SLA7033M) is a stepper motor driver IC developed
to reduce the number of external parts required by the conventional SLA7024M (SLA7026M). This IC successfully eliminates
the need for some external parts without sacrificing the features
of SLA7024M (SLA7026M). The basic function pins are compatible with those of SLA7024M (SLA7026M).
■Notes on Replacing SLA7024M (SLA7026M)
SLA7032M (SLA7033M) is pin-compatible with SLA7024M
(SLA7026M). When using the IC on an existing board, the following preparations are necessary:
the SYNC terminals open because they are for CMOS input.
Connect TTL or similar to the SYNC terminals and switch the
SYNC terminal level high or low.
When the motor is not running, set the TTL signal high (SYNC
terminal voltage: 4 V or more) to make chopping synchronous.
When the motor is running, set the TTL signal low (SYNC terminal
voltage: 0.8 V or less) to make chopping asynchronous. If chopping is set to synchronous at when the motor is running, the motor
torque deteriorates before the coil current reaches the set value.
If no abnormal noise occurs when the motor is not running,
ground the SYNC terminals (TTL not necessary).
(1) Remove the resistors and capacitors attached for setting
the chopping OFF time. (r3, r4, C1, and C2 in the catalog)
(2) Remove the resistors and capacitors attached for preventing
noise in the detection voltage VRS from causing malfunctioning and short the sections from which the resistors were re-
SYNC_A
TTL, etc.
SYNC_B
moved using jumper wires. (r5, r6, C3, and C4 in the catalog)
(3) Normally, keep pins 2 and 13 grounded because their funcSLA7032M
SLA7033M
tions have changed to synchronous and asynchronous
switching (SYNC terminals). For details, see "Circuit for Preventing Abnormal Noise When the Motor Is Not Running (Syn-
SYNC voltage : Low → Chopping asynchronous
SYNC voltage : High → Chopping synchronous
chronous circuit)." (Low: asynchronous, High: synchronous)
■Circuit for Preventing Abnormal Noise When the
Motor Is Not Running (Synchronous Circuit)
A motor may generate abnormal noise when it is not running. This
phenomenon is attributable to asynchronous chopping between
phases A and B. To prevent the phenomenon, SLA7032M
(SLA7033M) contains a synchronous chopping circuit. Do not leave
The built-in synchronous chopping circuit superimposes a trigger
signal on the REF terminal for synchronization between the two
phases. The figure below shows the internal circuit of the REF
terminal. Since the ∆VREF varies depending on the values of R1
and R2, determine these values for when the motor is not running within the range where the two phases are synchronized.
5V
R1
VREF
R2
3
REF_A
14
REF_B
To comparator
(high impedance)
40Ω
(typ.)
40Ω
(typ.)
SLA7032M
SLA7033M
Sync/async switching
signal
ONE SHOT
(tw=2 µ S)
FET A/A
gate drive signal
ONE SHOT
(tw=2 µ S)
FET B/B
gate drive signal
VREF waveform
VREF
0
Synchronous circuit operating waveform
VREF
Phase A
0
VRS
VREF
Phase B
0
VRS
Synchronous circuit OFF
Synchronous circuit ON
SLA7032M/SLA7033M
31
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
■Determining the Output Current
SLA7032M/SLA7033M
Fig. 1 Waveform of coil current (Phase A excitation ON)
Fig. 1 shows the waveform of the output current (motor coil curIO
rent). The method of determining the peak value of the output
current (IO) based on this waveform is shown below.
(Parameters for determining the output current I O)
Phase A
0
Vb: Reference supply voltage
r1,r2: Voltage-divider resistors for the reference supply voltage
Phase A
RS: Current sense resistor
(1) Normal rotation mode
IO is determined as follows when current flows at the maximum
level during motor rotation. (See Fig.2.)
IO ≅
r2
•
r1+r2
Vb ................................................................
(1)
RS
Fig. 2 Normal mode
Vb(5V)
(2) Power down mode
r1
The circuit in Fig.3 (rx and Tr) is added in order to decrease the
3,(14)
coil current. I O is then determined as follows.
1
IOPD ≅
r1(r 2+rX)
1+
•
r2
V
b
.........................................................
(2)
RS
9,(10)
r2 • rX
RS
Equation (2) can be modified to obtain equation to determine rx.
rX=
1
1
r1
Vb
R s • IOPD
−1
−
1
Fig. 3 Power down mode
r2
Vb(5V)
Fig. 4 and 5 show th e graphs of equations (1) and (2) respectively.
r1
rX
Power down
signal
Fig. 4 Output current IO vs. Current sense resistor RS
3
r2 · V b
r1+r2 RS
r1=510Ω
r2=100Ω
rx=∞
Vb=5V
IO=
2
1
0
1
2
3
SLA7032M/SLA7033M
4
Output current IOPD (A)
Output current IO (A)
Tr
2.0
Current sense resistor RS (Ω)
32
9,(10)
r2
Fig. 5 Output current IOPD vs. Variable current sense resistor r x
4
0
3,(14)
RS =0.5Ω
1.5
1
· Vb
r1(r2+rX) RS
1+
r2 · rX
r1=510Ω
r2=100Ω
Vb=5V
IOPD=
RS =0.8Ω
1.0
RS =1Ω
0.5
00
200
400
600
800
1000 1200
Variable current sense resistor rX (Ω)
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
SLA7032M/SLA7033M
■Thermal Design
An outline of the method for calculated heat dissipation is shown below.
(1) Obtain the value of PH that corresponds to the motor coil current IO from Fig. 6 "Heat dissipation per phase PH vs. Output current IO."
(2) The power dissipation Pdiss is obtained using the following formula.
2-phase excitation: Pdiss ≅ 2PH+0.015×VS (W)
3
P H+0.015×VS (W)
2
(3) Obtain the temperature rise that corresponds to the computed value of Pdiss from Fig. 7 "Temperature rise."
1-2 phase excitation: Pdiss ≅
Fig. 6 Heat dissipation per phase PH vs. Output current IO
SLA7033M
SLA7032M
4.0
VC
Motor : 23LM-C004
Holding mode
5V
24V
0.4
1
0.2
0
0
0.2
0.4
0.6
0.8
Output current IO (A)
V
2.0
15
Motor : 23PM-C503
Holding mode
1.0
0
0
1.0
V
=4
4
C
V
V
44
C=
24
0.6
3.0
VC
V
36
V
0.8
36
1.0
Heat dissipation per phase PH (W)
Heat dissipation per phase PH (W)
1.2
1.0
2.0
Output current IO (A)
3.0
Fig. 7 Temperature rise
150
∆T
100
j
∆Tj–a
∆TC–a (°C)
C
∆T
Natural cooling
Without heatsink
50
0
0
1
2
3
Total Power (W)
4
5
Thermal characteristics
SLA7032M
SLA7033M
50
Without heatsink
Natural cooling
25
20
TC ( 4 pin)
15
Motor : PH265-01B
Motor current IO=0.8A
Ta=25°C
VCC=24V, VS=24V
2-phase excitation
10
5
0
200
500
Response frequency (pps)
1K
Case temperature rise ∆TC–a (°C)
Case temperature rise ∆TC–a (°C)
30
Without heatsink
Natural cooling
40
30
TC( 4 pin)
Motor : 23PM-C705
Motor current IO=1.5A
Ta=25°C
VCC=24V, VS=24V
2-phase excitation
20
10
0
100
500
1K
5K
Response frequency (pps)
SLA7032M/SLA7033M
33
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
SLA7032M/SLA7033M
■Supply Voltage VCC vs. Supply Current I CC
SLA7033M
SLA7032M
1.5
400
Motor : 23LM-C004
1-phase excitation
Holding mode
IO : Output current
300
200
IO=1A
Supply current ICC (A)
Supply current ICC (mA)
500
1.0
Motor : 23PM-C503
1-phase excitation
Holding mode
IO : Output current
IO=3A
0.5
IO=2A
100
0
0.5A
0.2A
0
10
20
30
40
IO=1A
0
50
0
10
20
30
40
50
Supply voltage VCC (V)
Supply voltage VCC (V)
■Torque Characteristics
SLA7032M
2.0
6.0
SLA7033M
Motor : 23LM-C202
Output current IO =0.8A
Motor supply voltage VCC =24V
2-phase excitation
1.0
0.5
Pull-out torque (kg-cm)
Pull-out torque (kg-cm)
5.0
1.5
4.0
Motor : 23PM-C705
Output current IO =2.5A
Motor supply voltage VCC =24V
2-phase excitation
3.0
2.0
1.0
0
100
500
1K
Response frequency (pps)
34
SLA7032M/SLA7033M
5K
0
100
500
1K
5K
Response frequency (pps)
10K
2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
■Chopper frequency vs. Output current
50
50
40
40
30
Motor : 23LM-C202
IO = 0.8A at VCC=24V
RS=1Ω
20
30
Motor : 23LM-C202
VCC=24V
RS=1Ω
20
10
10
0
f (kHz)
f (kHz)
■Chopper frequency vs. Supply voltage
SLA7032M/SLA7033M
0
10
20
30
40
0
50
0
0.2
0.4
0.6
0.8
1.0
IO (A)
VCC (V)
■Note
The excitation input signals of the SLA7032M, SLA7033M can be used as either Active High or Active Low. Note, however, that the
corresponding output (OUT) changes depending on the input (IN).
Active Low
Active High
Corresponding output
Input
Corresponding output
INA (pin6)
OUTA (pin1)
INA (pin6)
OUTA (pin8)
INA (pin5)
OUTA (pin8)
INA (pin5)
OUTA (pin1)
INB (pin17)
OUTB (pin11)
INB (pin17)
OUTB (pin18)
INB (pin16)
OUTB (pin18)
INB (pin16)
OUTB (pin11)
Input
■Handling Precautions
The input terminals of this product use C-MOS circuits. Observe the following precautions.
● Carefully control the humidity of the room to prevent the buildup of static electricity. Since static electricity is particularly a problem
during the winter, be sure to take sufficient precautions.
● Take care to make sure that static electricity is not applied to the IC during wiring and assembly. Take precautions such as shorting
the terminals of the printed wiring board to ensure that they are at the same electrical potential.
SLA7032M/SLA7033M
35