2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M
■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.
October 2005
■Package----SLA18Pin
■Applications
●PPC
●Printer
●OA
Equipment
■Key
Specifications
●Motor
Supply Voltage (VM)：44V max
●Load
Supply Voltage (Vs)：10V�½�44V
●Logic
Supply Voltage (Vcc)：3V�½�5.5V
●Output
Current (Io)：1A(SLA7050M)
2A(SLA7051M)
3A(SLA7052M)
●Output
Maximum Voltage (V
DSS
)：100V min
■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
Typical Connection
Vs=10V�½� 44V
1
3
14
16
18
＋
Vcc=3.0V�½�5.5V
Disable
CA
5
Q1
＋
r1
7
8
11
12
9
OutA OutA/
Vcc
Vs
OutB/ OutB
NC
GA
GB
NC
SenseB
13
2
4
15
17
CB
マイコン
等
Clock
SLA７０５１ M
Sync
SLA７０５２ M
CW/CCW
Full/Half
Ref SenseA
Gnd
6
10
SLA７０５０ M
r2
RsA
RsB
S-Gnd
Gnd
P-Gnd
Sanken Electric Co.,Ltd.
http://www.sanken-ele.co.jp/en/
I03-002EA-051006
1/14
SANKEN [ SANKEN ELECTRIC ]
