dspin l6470 marketing pres

dSPIN Future in motion
d
L6470
dSPIN: breakthrough in motor control
 ST is universally acknowledged as
one of the leading semiconductor
suppliers for motor control applications
 ST is a pioneer and leader in smart
power monolithic and integrated
solutions for motor driver applications
dSPIN represents the breakthrough solution
for stepper motors in terms of performance
with fast & easy design
The 3 key benefits of dSPIN
Voltage mode
driving
Outstanding position accuracy & smooth motion:
- Resolution up to 128 microsteps/step
- Very accurate sine-wave profile
Digital core
Fully digital motion management:
- User-defined motion profiles easily programmable
through SPI interface
- No need of complex MCU routines
Full set of
protection
features
High level of robustness against system faults:
- Thermal, low bus voltage, overcurrent,
stall detection
- Easy design, reduced external components
Monolithic digital microstepping driver
BCD 0.35 m, multi-power technology
3V voltage
regulator
16MHz
oscillator
ADC
dSPIN
Charge
pump
core
Power
stage
DAC and
comparator
Current
sensing
SPI
Thermal
protection
Driving multi-purpose bipolar stepper motors
Factory
automation,
sewing machine
Stage lighting
ATM, POS,
vending machines,
gaming
Medical, security
Professional and
label printers
Consumer,
toys & robotics
Voltage driving versus current driving
Without dSPIN

Standard current mode driving
Noisy and jerky motion
 Mechanical vibrations from abrupt
current changes
Inaccurate positioning
 Peak current different from target
Torque ripple and EMI difficult to control
 Non constant switching frequency


With dSPIN




Innovative voltage mode driving
Resolution up to 128 steps/step
Very accurate and smooth sine-wave profile
Reduced resonances, mechanical noise
and vibrations at low speed
Reduced torque and speed ripple at low
speeds
Outstanding position resolution and smooth motion
Standard current mode – more details
1. Abrupt current changes cause high mechanical vibrations
2. Peak current is
Current mode tries to follow even non –ideal steps (reference
voltage quantization and sampling)
Noisy and jerky motion
controlled; average
current value is different
from target
Inaccurate positioning
3. Non-constant switching frequency
Torque ripple and EMI are difficult to control
dSPIN innovative control – more details
Smooth current transient reduces
mechanical vibrations
Motor movement is soft and silent
Constant switching frequency
Torque ripple and EMI are controlled
Average current is controlled
Accurate positioning
Digital core
Without dSPIN
 Speed and position
profiles required
complex MCU routines
With dSPIN
 dSPIN does the tricky
part, following simple
high-level SPI commands
Fully digital motion management with simple commands
Integration of digital core
dSPIN manages the full motion profile
Target speed, acceleration, deceleration
Maximum speed
from 15.25 to 15610 step/s
(15.25 step/s resolution)
Absolute/ relative positioning
Integrated 22-bit
register
For up to 32768 full steps
@128 µstep
Acceleration and deceleration
from 14.55 to 59590 step/s2
(14.55 step/s2 resolution)
Advanced set of protection features
 Programmable non
dissipative overcurrent
protection
 Internal sensing of highand low-side power
 Two levels of overtemperature protection
 Under voltage protection
 Stall detection
Example of stall detection
Vphase
STALL
threshold
Iphase
BEMF
Normal operation
High level of robustness against system faults
Stall
High configurability for easy design
 3 slew-rate levels programmable through SPI
 180 V/μs, 290 V/μs and 530 V/μs
 SPI daisy-chain configuration
 4 clock configurations
 Logic supply management
Fully-digital control through SPI
Absolute-position
register can be set
Speed profile
parameters
Torque control
parameters
BEMF compensation
Phase resistance drift
compensation
ADC conversion result
Overcurrent threshold
Stall detection threshold
Device configuration and
status
Motor electrical
position (current
microstep)
can be set
L6470 - Benefits summary

Voltage mode driving



Digital core

Full set of protections

128 µsteps/ step is the best motion resolution ever
reached in monolithic stepper motor drivers
Smoothness of motion is like never before
All with a single chip, avoiding more expensive and
space consuming discrete solutions
Fully digital motion control allows the user to set a variety
of features: target speed, acceleration/ deceleration,
absolute and relative position, just to name a few
SPI interface allows user to easily insert desired
parameters with no need for external microcontroller
A full set of protection functions confers robustness to
the system and helps to further reduce the number of
external components, the cost and complexity
Outstanding performance with fast & easy design
Motor control
system-on-chip
er
w
Po pin
S
in
D
d
Sp
in
p
s
Advanced control
driving
C
Performance & Integration
Motor control ICs
C-SPIN digital
controller + driver
conceived to enable a wide
variety of implementations
Making your designs easier
Packages
HTSSOP28 package (H type) – mass production
PowerSO36 (PD Type) – samples already available
Support
Full design support: evaluation board,
software, USB and IBU interface boards,
application notes, available at:
www.st.com/dspin
Tools and documentation

Sales codes
 L6470H
 L6470HTR
 L6470PD
- HTSSOP28 - Tray
- HTSSOP28 - Tape & Reel
- PowerSO36 (Samples available now)

L6470 Documentation:
 L6470 webpage
 Datasheet
 Application Note (AN3103)

Software: L6470 Evaluation tool software

Evaluation boards
 EVAL6470H
 EVAL6470PD

Control boards
 STEVAL-PCC009V2 (and –V1)

dSPIN firmware library
 Available at http://www.st.com/dspin
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