PRELIMINARY INFORMATION
(subject to change without notice)
September 24, 2003
SLA7060M
THRU
SLA7062M
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 (PMCM™). 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 µP 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 -20°C and
+85°C.
Data Sheet
28210.10
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
.............
+150°C
Operating Temperature Range,
T
A
.................................
-20°C to +85°C
Storage Temperature Range,
T
S
...............................
-30°C to +150°C
* 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 µs of the current-sense pulse.
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
.
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