2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
■General Description
Combining low-power CMOS logic with high-current, high-voltage
power FET outputs, the Series SLA705xM translator/driver provides
complete control and drive for a two-phase unipolar stepper motor
with internal fixed off time, pulse-width modulation (PWM) control
of the output current in a power multi-chip module (PMCM™).
The CMOS logic section provides the sequencing logic, direction,
full/half-step 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 and withstanding 46 V in the off
state. Ground-clamp and flyback diodes provide protection against
inductive transients. Special power-up sequencing is not required.
Full-step (2 phase) and half-step operation are externally selectable.
Two-phase drive energizes two adjacent phases in each detent
position (AB-BC-CD-DA). This sequence mode offers an improved
torquespeed product, greater detent torque, and is less susceptable to
motor resonance. Half-step excitation alternates between the
one-phase and two-phase modes (A-AB-B-BC-C-CD D-DA),
providing an eight-step sequence.
■Package----SLA18Pin
■Applications
●PPC
●Printer
●OA Equipment
■Features
●To 3A Output Rating
●Internal Sequencer for Full or Half-Step Operation
●PWM Constant-Current Motor Drive
●Cost-Effective, Multi-Chip Solution
●100 V, Avalanche-Rated NMOS
●Low rDS(on) NMOS Outputs (300 milli-ohms typical)
●Advanced, Improved Body Diodes
●Half-Step and Full-Step Unipolar Drive
●Inputs Compatible with 3.3 V or 5 V Control Signals
●Sleep Mode
●Internal Clamp Diodes
■Key Specifications
●Motor Supply Voltage (VM)：44V max
●Load Supply Voltage (Vs)：10V～44V
●Logic Supply Voltage (Vcc)：3V～5.5V
●Output Current (Io)：1A(SLA7050M)
2A(SLA7051M)
3A(SLA7052M)
●Output Maximum Voltage (V
DSS
)：100V min
Typical Connection
７０５０SLA M
７０５１SLA M
７０５２SLA M
マイコン
等
1813 1614
4
15
5
7
8
9
11
12
6
2
17
13
Vs
GA
NC
OutA OutA/ OutBOutB/
Vcc
Clock
Sync
CW/CCW
Full/Half
Ref SenseBSenseA Gnd
10
r1
r2
Disable
Q1
RsA RsB
＋
＋
CA
CB
～Vs=10V 44V
～Vcc=3.0V 5.5V
S-Gnd
P-Gnd
Gnd
NC
GB
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