SLA7078MPR [ALLEGRO]
Motor Driver IC Family; 电机驱动器IC系列
| 型号： | SLA7078MPR |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Motor Driver IC Family |
| 文件： | 总13页 (文件大小：364K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver IC Family
The SLA7075M, SLA7076M, SLA7077M, and SLA7078M motor driver
ICs feature 2-phase stepper unipolar drivers. The clock-in type input interface
allows simplified control logic, and options for built-in sense current detection
and load circuit short or open protection (patent pending) provide lower loss,
and lower thermal resistance. All products in the SLA7070M series are pin-
compatibile, supporting rapid design of application variants.
The built-in excitation distribution circuit (sequencer) allows motor control
using only the CLOCK signal for simple operations (rotate/stop), with motor
speed control by frequency input into CLOCK pin. This eliminates logic signal
lines required for conventional phase-input methods, and reduces demand on
heavily-used CPUs.
Contact Allegro® for application information and additional information on
device performance and logic.
FEATURES AND BENEFITS
ABSOLUTE MAXIMUM RATINGS
AT TA = 25°C
Features
Power supply voltages, VBB: 46 V(max.), 10 to 44 V normal operating range
Logic supply voltages, VDD: 3.0 to 5.5 V
Maximum output currents: 1 A, 1.5 A, 2 A, 3 A
Built-in sequencer
Load (Motor) Supply Voltage, VM .........46 V
Main Power Supply Voltage, VBB..........46 V
Logic Supply Voltage, VDD ...........................7 V
Output Current, IOUT
SLA7075M.................................1.0 A
SLA7076M.................................1.5 A
SLA7077M.................................2.0 A
SLA7078M.................................3.0 A
Logic Input Voltage, VIN
Simplified clock-in stepping control
Microstepping at full-, half-, quarter-, eighth-, and sixteenth-steps
Built-in sense resistor, RSInt
.............................. –0.3 to VDD+0.3 V
REF Input Voltage, VREF
............................................–0.3 to VDD+0.3 V
Sense Voltage, VSInt
tw < 1 μs is not considered..........±2 V
Power Dissipation, PD
All variants are pin-compatible for enhanced design flexibility
ZIP type 23-pin molded package (SLA package)
Self-excitation PWM current control with fixed off-time; off-time adjusted
automatically by step reference current ratio (3 levels)
Built-in synchronous rectifying circuit reduces losses at PWM off
Synchronous PWM chopping function prevents motor noise in Hold mode
Sleep mode for reducing the IC input current in stand-by state
Without heat sink ......................4.7 W
Junction Temperature, TJ.......................150°C
Ambient Temperature, TA.......–20 to 85°C
Storage Temperature, Tstg ...–30 to 150°C
Built-in protection circuitry against motor coil opens/shorts option available
Sanken Power Devices
from Allegro MicroSystems
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
PART NUMBERS AND OPTIONS
The following are the product variants and optional features
available for these variants of the SLA7070M series.
NOTE
The following abbreviations are used throughout this
document to refer to product variants:
PR – Product with both Protection Circuitry and
built-in RSInt options
Not all combinations of standard models and product op-
tions are available in high-volume production quantities. For
information on product availability, and assistance with deter-
mining the IC features that are the best fit for your application,
please contact our sales office or representative.
R – Product with the built-in RSInt option
Output Current, IOUT
Blanking Time
Part Number
Protection
Sequencer
Clock Edge
(A)
(μs)
SLA7075MR
SLA7075MPR
SLA7076MR
SLA7076MPR
SLA7077MR
SLA7077MPR
SLA7078MR
SLA7078MPR
RSInt
1
Protection Circuitry and RSInt
RSInt
1.5
2
Protection Circuitry and RSInt
RSInt
Microstep
1.7
Positive
Protection Circuitry and RSInt
RSInt
3
Protection Circuitry and RSInt
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036
Copyright © 2005 Allegro MicroSystems, Inc.
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
FUNCTIONAL BLOCK DIAGRAM AND PIN ASSIGNMENTS
1
2
3
4
14
13
18
6
7
8
9
16 10 15
11
20 21 22 23
Reg.
MIC
Pre-
Pre-
Sequencer
&
Driver
Driver
Sleep Circuit
Protect
Protect
DAC
DAC
+
+
Comp
Synchro
Control
Comp
19
5
SenseA
SenseB
PWM
Control
PWM
-
-
Control
OSC
OSC
RSInt
RSInt
17
12
Sync Gnd
For R products, protection circuits not built-in. FLAG pin is not connected internally.
Pin No.
Symbol
Functions
Output of phase A
Pin No.
13
Symbol
Functions
1
2
3
4
5
Ref/Sleep1 Input for control current and Sleep1 setting
OutA
OutA
14
VDD
Reset
F/R
Power supply to logic
15
Reset for internal logic
Output of phase A¯
16
Forward/reverse switch input
Synchronous PWM control switch input
SenseA
Mo
Phase A current sensing
17
Sync
Output from monitor of 2-phase excitation
status
6
18
Flag*
Output from protection circuits monitor
Phase B current sensing
7
8
M1
M2
19
20
21
22
SenseB
Commutation and Sleep2 setting
OutB
Output of phase B¯
9
M3
10
11
12
Clock
VBB
GND
Step clock input
Main power supply (for motor)
Ground
OutB
Output of phase B
23
*Flag pin active on PR products only; not internally connected for R products.
www.allegromicro.com
3
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
ELECTRICAL CHARACTERISTICS, valid at TA = 25°C, VBB = 24 V, VDD = 5 V, applicable to both PR and R products, unless
otherwise specified
Characteristics
Symbol
IBB
Test Conditions
Min.
Typ.
–
Max.
Units
mA
μA
mA
V
Normal mode
–
15
Main Power Supply Current
IBBS
IDD
VDSS
fclk
Sleep1 and Sleep2 modes
–
–
100
Logic Power Current
–
–
5
MOSFET Breakdown Voltage
Maximum Response Frequency
VBB = 44 V, IDS = 1 mA
Clock Duty Cycle = 50%
–
–
–
250
–
–
kHz
V
VIL
–
–
0.25 × VDD
Logic Supply Voltage
Logic Supply Current
VIH
0.75 × VDD
–
–
–
–
–
V
IIL
–
–
–
±1
±1
–
μA
μA
V
IIH
VREF
See pages 6 and 7
REF Input Voltage
Output OFF, Sleep1 mode, IBBS in specification,
sequencer = enable
VREFS
IREF
2.0
–
–
VDD
–
V
μA
V
REF Input Current
±10
VREF
VREF = 0.1 V to 0.5 V, Step reference current
ratio: 100%
SENSE Voltage
VSInt
VREF –0.03
VREF+0.03
Sleep-Enable Recovery Time
tSE
tcon
tcoff
VREF = 2.0 V → 1.5 V
Clock → Output ON
Clock → Output OFF
100
–
–
–
–
–
μs
μs
μs
2.0
1.5
Switching Time
–
115 Northeast Cutoff, Box 15036
4
Worcester, Massachusetts 01615-0036
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
STEPPING CHARACTERISTICS, applicable to both PR and R products; representative values from SLA7070M series shown
Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified
Characteristics
Symbol
Mode F
Mode E
Mode D
Mode C
Mode B
Mode A
Mode 9
Test Conditions
Min.
Typ.
100
98.1
95.7
92.4
88.2
83.1
77.3
70.7
63.4
55.5
47.1
38.2
29
Max.
Units
%
–
–
–
–
%
–
–
%
–
–
%
–
–
%
–
–
%
–
–
%
Step Reference Current Ratio
Mode 8 VREF ≈ VSInt = 100 %, VREF = 0.1 to 0.5 V
–
–
%
Mode 7
Mode 6
Mode 5
Mode 4
Mode 3
Mode 2
Mode 1
–
–
%
–
–
%
–
–
%
–
–
%
–
–
%
–
19.5
9.8
–
–
%
–
–
%
VMOL
VMOH
IMOL
IMOH
ton(min)
toff1
IMOL=1.25 mA
–
1.25
–
V
Mo (Load) Output Voltage
IMOH=–1.25 mA
VDD–1.25
–
V
–
–
1.25
–
mA
mA
μs
μs
μs
μs
Mo (Load) Output Current
PWM Minimum On-Time
–1.25
–
–
–
–
–
1.7
12
–
Mode 8 to Mode F
Mode 4 to Mode 7
Mode 1 to Mode 3
–
PWM Off-Time
toff2
9
–
toff3
7
–
www.allegromicro.com
5
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
OUTPUT CHARACTERISTICS for both PR and R products
Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified
Characteristics
IOUT = 1.0 A (SLA7075M)
Output On Resistance
Symbol
Test Conditions
Min.
Typ.
Max.
Units
RDS(ON) IDS = 1 A
–
–
0.7
0.85
1.1
Ω
Body Diode Forward Voltage
IOUT = 1.5 A (SLA7076M)
Output On Resistance
Vf
If = 1 A
0.85
V
RDS(ON) IDS = 1.5 A
Vf If = 1.5 A
–
–
0.45
1.0
0.6
Ω
Body Diode Forward Voltage
IOUT = 2.0 A (SLA7077M)
Output On Resistance
1.25
V
RDS(ON) IDS = 2 A
Vf If = 2 A
–
–
0.25
0.95
0.4
1.2
Ω
Body Diode Forward Voltage
IOUT = 3.0 A (SLA7078M)
Output On Resistance
V
RDS(ON) IDS = 3 A
Vf If = 3 A
–
–
0.18
0.95
0.24
2.1
Ω
Body Diode Forward Voltage
V
BUILT-IN SENSE RESISTOR CHARACTERISTICS for PR and R products
Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
IOUT = 1.0 A (SLA7075MPR and SLA7075MR)
Sense Resistor Rating*
REF Input Voltage
RSInt
VREF
Tolerance: ±3 %
Within specified current limit
0.296
0.1
0.305
–
0.314
0.3
Ω
V
IOUT = 1.5 A (SLA7076MPR and SLA7076MR)
Sense Resistor Rating*
REF Input Voltage
RSInt
VREF
Tolerance: ±3 %
0.296
0.1
0.305
–
0.314
0.45
Ω
Within specified current limit
V
IOUT = 2.0 A (SLA7077MPR and SLA7077MR)
Sense Resistor Rating*
REF Input Voltage
RSInt
VREF
Tolerance: ±3 %
0.199
0.1
0.205
–
0.211
0.4
Ω
Within specified current limit
V
IOUT = 3.0 A (SLA7078MPR and SLA7078MR)
Sense Resistor Rating*
REF Input Voltage
RSInt
VREF
Tolerance: ±3 %
0.150
0.1
0.155
–
0.160
0.45
Ω
Within specified current limit
V
*RSInt includes approximately 5 mΩ circuit resistance in addition to the resistance of the resistor itself.
115 Northeast Cutoff, Box 15036
6
Worcester, Massachusetts 01615-0036
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
PROTECTION CIRCUIT CHARACTERISTICS*
Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
PR products
Overcurrent Sense Voltage
FLAG Output Voltage
VOCP
VFlagL
VFlagH
IFlagL
Motor coils shorted
0.65
0.7
–
0.75
1.25
–
V
V
IFLAGL = 1.25 mA
IFLAGH = –1.25 mA
–
VDD–1.25
–
–
V
FLAG Output Current
–
1.25
–
mA
mA
IFlagH
–1.25
–
*Protection circuits work on the condition of VSInt ≥ VOCP
.
RECOMMENDED OPERATING RANGES, applicable to both PR and R products, unless otherwise specified
Characteristics
Load (Motor) Supply Voltage
Main Power Supply Voltage
Symbol
VM
Remarks
Min
–
Max
Units
V
44
44
VBB
10
V
Surge voltage at VDD pin should be less
than ±0.5 V to avoid malfunctioning in
operation
Logic Supply Voltage
Case Temperature
VDD
TC
3.0
–
5.5
90
V
Measured at pin 12, without heat sink
°C
ALLOWABLE POWER DISSIPATION
PR and R Products
5
4
3
2
1
0
ǰj-a=
26.6͠/W
0
10
20
30
40
50
60
70
80
90
Ambient Temperature, T (°C)
A
www.allegromicro.com
7
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
FUNCTIONAL DESCRIPTION
PWM Current Control
The description in this section is applicable to the PR and R
products.
an output is enabled and current flows through the motor wind-
ing and the current-sense resistors. When the voltage across the
current-sense resistor equals the DAC output voltage, VTRIP, the
current-sense comparator resets the PWM latch. This turns off
the driver for the fixed off-time, during which the load induc-
tance causes the current to recirculate for the off-time period.
Therefore, if the ringing noise on the sense resistor equals and
surpasses VTRIP, PWM turns off.
• Blanking time
The actual operating waveforms on the SENSEx pins when
driving a motor are shown in figure 1. Immediately after PWM
turns OFF, ringing (or spike) noise on the SENSEx pins is ob-
served for a few μs. Ringing noise can be generated by various
causes, such as capacitance between motor coils and inappropri-
ate motor wiring.
To prevent this phenomenon, the blanking time is set to
Each pair of outputs is controlled by a fixed off-time (7 to
12 μs, depending on stepping mode) PWM current-control cir-
cuit that limits the load current to a desired value, ITRIP. Initially,
t
override signals from the current-sense comparator for a certain
period right after PWM turns on (figure 2).
t
Expanded Time Scale
ITRIP
500
5 μs/Div.
Figure 1. Operating waveforms on the SENSEx pins during PWM chopping
PWM Pulse Width
A
tOFF
(Fixed)
tON
ITRIP
0
A
Blanking Time
Figure 2. SENSEx pins pattern during PWM control
115 Northeast Cutoff, Box 15036
8
Worcester, Massachusetts 01615-0036
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
PWM Off Period
Figure 3 shows the difference in back EMF generative
system between the SLA7060M series and SLA7070M series.
The SLA7060M series performs on–off operations using only
the MOSFET on the PWM-on side, but the SLA7070M series
also performs on–off operations using only the MOSFET on the
PWM-off side. To prevent simultaneous switching of the MOS-
FETs at synchronous rectification operation, the IC has a dead
time of approximately 0.5 μs. During dead time, the back EMF
flows through the body diode on the MOSFET.
The PWM off-time for the SLA7070M series is controlled
as a fixed time by an internal oscillator. It also is switched in 3
levels by current proportion (see the Electrical Characteristics
table).
In addition, the SLA7070M series provide a function that
decreases losses occurring when the PWM turns off. This func-
tion dissolves back EMF stored in the motor coil at MOSFET
turn-on, as well as at PWM turn-on (synchronous rectification
operation).
SLA7060M Series
SLA7070M Series
V
V
BB
BB
I
I
I
I
off
on
off
on
Stepper Motor
Stepper Motor
V
V
g
V
V
g
g
g
Back EMF at Dead Time
RSExt
RSInt
V
V
S
S
+V
+V
PWM On
PWM Off
PWM On
PWM On
PWM Off
PWM On
Dead
Time
Dead
Time
V
V
g
g
FET Gate
Signal
FET Gate
Signal
0
0
t
t
V
V
g
g
V
S
V
REF
0
REF
V
V
S
0
t
t
Figure 3. Synchronous rectification operation. During Dead Time,
the Back EMF flows through the body diode of the MOSFET
www.allegromicro.com
9
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
Protection Functions: PR Types
put is disabled at the time the protection circuit starts.
The PR types of the SLA7070M series include a motor coil
short-circuit protection circuit and a motor coil open protection
circuit. They are described in this section.
In order for the motor coil short-circuit protection circuit to
operate, VSInt must be greater than VOCP.
Overcurrent that flows without passing the sense resistor
is undetectable. To resume the circuit after protection operates,
VDD must be cycled.
• Motor Coil Short-Circuit Protection (Load Short) Circuit
This protection circuit, embedded in the SLA7070M series,
begins to operate when the device detects an increase in the volt-
age level on the sense resistor, VSInt
.
• Motor Coil Open Protection
Details of this functions is not disclosed yet due to our pat-
ent policy.
The voltage at which motor coil short-circuit protection
starts its operation, VOCP, is set at approximately 0.7 V. The out-
V
M
Coil Short Circuit
Normal Operation
+V
Coil Short Circuit
Output Disable
V
OCP
Stepper Motor
V
V
g
REF
V
S
0
RSInt
t
V
S
Figure 4. Motor coil short circuit protect circuit operation. Overcurrent that flows with-
out passing the sense resistor is undetectable. To recover the circuit after protection oper-
ates, VDD must be cycled and started up again.
115 Northeast Cutoff, Box 15036
10
Worcester, Massachusetts 01615-0036
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
PACKAGE OUTLINE DRAWING, SLA-23 PIN
31 ±±.ꢀ
ꢀ4.4 ±±.ꢀ
4.8 ±±.ꢀ
1.7 ±±.1
φ3.ꢀ ±±.1ꢁ ꢂ 3.8
16.4 ±±.ꢀ
Gate Flash
φ3.ꢀ ±±.1ꢁ
Branding
ꢀ.4ꢁ ±±.ꢀ
(Base Measurement)
XXXXXXXX
XXXX
X
4-(R1)
R-end
+±.ꢀ
-±.1
±.6ꢁ
+±.ꢀ
-±.1
±.ꢁꢁ
ꢀꢀ × P1.ꢀ7 ±±.ꢁ = ꢀ7.94 ±±.1
(Tip Measurement)
4.ꢁ ±±.7
(Tip Measurement)
31.3 ±±.ꢀ
(Includes Mold Flash)
1
3
ꢁ
7
9
11 13 1ꢁ 17 19 ꢀ1 ꢀ3
ꢀ
4
6
8 1± 1ꢀ 14 16 18 ꢀ± ꢀꢀ
Terminal core material: Cu
Branding:
1st line,
ꢀnd line-left, lot:
Where:
Terminal treatment: Ni plating and solder dip
Leadform: ꢀ1ꢁ1
type: SLA7±7ꢂMR
YMDD
Dimensions in millimeters
Y is the last digit of the year of manufacture
M is the month (1 to 9, O, N, D)
DD is the ꢀ-digit date
ꢀnd line-right, subtype: P for Protection Circuitry option; otherwise, blank
Leadframe plating Pb-free. Device composition includes
high-temperature solder (Pb >85%), which is exempted
from the RoHS directive.
www.allegromicro.com
11
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
PACKING SPECIFICATIONS
Plug at each end of tube
8
18 Devices per tube
20 Tubes
580
18 Devices
3 Layers
1080 Devices per carton
31
130
3 Layers
610
Dimensions in mm
185
20 Tubes
115 Northeast Cutoff, Box 15036
12
Worcester, Massachusetts 01615-0036
SLA7075M, SLA7076M,
SLA7077M, and SLA7078M
Motor Driver ICs
WARNING —These devices are designed to be operated at lethal voltages and energy levels. Circuit designs
thatembodythesecomponentsmustconformwithapplicablesafetyrequirements. Precautionsmustbe
takentopreventaccidentalcontactwithpower-linepotentials. Donotconnectgroundedtestequipment.
The use of an isolation transformer is recommended during circuit development and breadboarding.
The products described herein are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc.
Sanken and Allegro reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit im-
provements in the performance, reliability, or manufacturability of its products. Therefore, the user is cautioned to verify that the information in this
publication is current before placing any order.
When using the products described herein, the applicability and suitability of such products for the intended purpose shall be reviewed at the users
responsibility.
Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products
at a certain rate is inevitable.
Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems
against any possible injury, death, fires or damages to society due to device failure or malfunction.
Sanken products listed in this publication are designed and intended for use as components in general-purpose electronic equipment or apparatus
(home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Their use in any application requiring radiation
hardness assurance (e.g., aerospace equipment) is not supported.
When considering the use of Sanken products in applications where higher reliability is required (transportation equipment and its control systems
or equipment, fire- or burglar-alarm systems, various safety devices, etc.), contact a company sales representative to discuss and obtain written
confirmation of your specifications.
The use of Sanken products without the written consent of Sanken in applications where extremely high reliability is required (aerospace equip-
ment, nuclear power-control stations, life-support systems, etc.) is strictly prohibited.
The information included herein is believed to be accurate and reliable. Application and operation examples described in this publication are
given for reference only and Sanken and Allegro assume no responsibility for any infringement of industrial property rights, intellectual property
rights, or any other rights of Sanken or Allegro or any third party that may result from its use.
1234
115 Northeast Cutoff, Box 15036
13
Worcester, Massachusetts 01615-0036
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