Data Sheet
28210.10
UNIPOLAR STEPPER-MOTOR
TRANSLATOR/DRIVERS
Combining low-power CMOS logic with high-current, high-voltage
power FET outputs, the Series SLA7060M translator/drivers provide
complete control and drive for a two-phase unipolar stepper motor with
internal fixed off time and pulse-width modulation (PWM) control of
the output current in a power multi-chip module (PMCMTM). There are
no phase-sequence tables, high-frequency control lines, or complex
interfaces to program.
The CMOS logic section provides the sequencing logic, direction,
control, synchronous/asynchronous PWM operation, and a "sleep"
function. The minimum CLOCK input is an ideal fit for applications
where a complex P is unavailable or overburdened. TTL or LSTTL
may require the use of appropriate pull-up resistors to ensure a proper
input-logic high. For PWM current control, the maximum output
current is determined by the user's selection of a reference voltage and
sensing resistor. The NMOS outputs are capable of sinking up to 1, 2,
or 3 A (depending on device) and withstanding 46 V in the off state.
Clamp diodes provide protection against inductive transients. Special
power-up sequencing is not required.
Half-, quarter-, eighth-, and sixteenth-step operation are externally
selectable for the SLA7060/61/62M. Half-step excitation alternates
between the one-phase and two-phase modes (AB-B-AB-A-AB-B-AB-
A), providing an eight-step sequence.
The Series SLA7060M is supplied in a 21-pin single in-line power-
tab package with leads formed for vertical mounting (suffix LF2102).
The tab is at ground potential and needs no insulation. For high-current
or high-frequency applications, external heat sinking may be required.
This device is rated for continuous operation between -20C and
+85C.
F
EATURES
To 3 A Output Rating
Internal Sequencer for Microstepping Operation
PWM Constant-Current Motor Drive
Cost-Effective, Multi-Chip Solution
100 V, Avalanche-Rated NMOS
Low r
DS(on)
NMOS Outputs
Advanced, Improved Body Diodes
Inputs Compatible with 3.3 V or 5 V Control Signals
Sleep Mode
Internal Clamp Diodes
Always order by complete part number, e.g., SLA7060MLF2102
.
A
BSOLUTE
M
AXIMUM
R
ATINGS
Driver Supply Voltage, V
BB
................ 46 V
Load Supply Voltage, V
M
.................. 46 V
Output Current, I
O
SLA7060M ................................. 1.0 A*
SLA7061M ................................. 2.0 A*
SLA7062M ................................. 3.0 A*
Logic Supply Voltage, V
DD
............... 7.0 V
Logic Input Voltage Range,
V
I
.......................... -0.3 V to V
DD
+ 0.3 V
Sense Voltage, V
S
........................ 2.0 V
Reference Input Voltage Range,
V
REF ..................................
-0.3 V to V
DD
+ 0.3 V
Package Power Dissipation,
P
D
....................................... See Graph
Junction Temperature, T
J
............. +150C
Operating Temperature Range,
T
A
................................. -20C to +85C
Storage Temperature Range,
T
S
............................... -30C to +150C
* Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under any set of
conditions, do not exceed the specified current rating or
junction temperature.
Internal filtering provides protection against transients
during the first 1 s of the current-sense pulse.
SLA7060M
THRU
SLA7062M
PRELIMINARY INFORMATION
(subject to change without notice)
September 24, 2003
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
SLA7060M
THRU
SLA7062M
UNIPOLAR STEPPER-MOTOR
TRANSLATOR/DRIVERS
2
Functional block diagram
Copyright 2003 Allegro MicroSystems, Inc.
Recommended operating conditions
Load Supply Voltage, V
BB
......................... 10 to 44 V
Logic Supply Voltage, V
DD
................... 3.0 V to 5.5 V
Reference Input Voltage, V
REF
............. 0.1 V to 1.0 V
Tab Temperature (no heat sink), T
T
................. <90C
SLA7060M
THRU
SLA7062M
UNIPOLAR STEPPER-MOTOR
TRANSLATOR/DRIVERS
www.allegromicro.com
3
Electrical characteristics: unless otherwise noted at T
A
= +25C, V
BB
= 24 V, V
DD
= 5.0 V.
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Output drivers
Driver Supply Volt. Range
V
BB
Operating
10
--
44
V
Drain-Source Breakdown
V
(BR)DS
V
BB
= 44 V, I
D
= 1 mA
100
--
--
V
Output On Resistance
r
DS(on)
SLA7060M, I
O
= 1.0 A
--
700
850
m
SLA7061M, I
O
= 2.0 A
--
250
400
m
SLA7062M, I
O
= 3.0 A
--
180
240
m
Body Diode Forward Volt.
V
F
SLA7060M, I
F
= 1.0 A
--
0.85
1.1
V
SLA7061M, I
F
= 2.0 A
--
0.95
TBD
V
SLA7062M, I
F
= 3.0 A
--
0.95
TBD
V
Driver Supply Current
I
BB
--
--
15
mA
V
REF
> 2.0 V (sleep mode)
--
--
100
A
Control logic
Logic Supply Volt. Range
V
DD
Operating
3.0
5.0
5.5
V
Logic Input Voltage
V
IH
0.75V
DD
--
--
V
V
IL
--
--
0.25V
DD
V
Logic Input Current
I
IH
--
1.0
--
A
I
IL
CLOCK, RESET, CW/CCW, and SYNC.
--
1.0
--
A
M1 and M2
-25
-50
-75
A
Max. Clock Frequency
f
clk
250*
--
--
kHz
PWM Off Time
t
off
70 to 100%I
trip
max
--
12
--
s
38 to 64%I
trip
max
--
9.0
--
s
9 to 30%I
trip
max
--
7.0
--
s
PWM Min. On Time
t
on(min)
--
1.8
--
s
Ref. Input Voltage Range
V
REF
Operating
0
--
1.5
V
Sleep mode
2.0
--
V
DD
V
Ref. Input Current
I
REF
--
10
--
A
Monitor Output Voltage
V
MoH
V
DD
- 1.25
--
--
V
V
MoL
--
--
1.25
V
Monitor Output Current
I
Mo
--
--
3.0
mA
Sense Voltage
V
S
Trip point at 100% I
O
0.95V
REF
V
REF
1.05V
REF
V
Sense Input Current
I
SENSE
--
10
--
A
Propagation Delay Time
t
PLH
Clock rising edge to output on
--
2.0
--
s
t
PHL
Clock rising edge to output off
--
1.5
--
s
Logic Supply Current
I
DD
--
--
4.0
mA
Typical values are given for circuit design information only.
*Operation at a clock frequency greater than the specified minimum value is possible but not warranted.
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