The AMIS-30624 is a single-chip microstepping motordriver with a position controller and control/diagnostic interface. It is ready to build
intelligent peripheral systems where up to 32 drivers can be connected to one I
2
C master. This significantly reduces system complexity.
The chip receives positioning instructions through the bus and subsequently drives the stator coils so the two-phase stepper motor
moves to the desired position. The on-chip position controller is configurable (OTP or RAM) for different motor types, positioning ranges
and parameters for speed, acceleration and deceleration. Microstepping allows silent motor operation and increased positioning
resolution. The advanced motion qualification mode enables verification of the complete mechanical system in function of the selected
2
2
motion parameters. The AMIS-30624 can easily be connected to an I C bus where the I C master can fetch specific status information
like actual position, error flags, etc. from each individual slave node.
An integrated sensorless step-loss detection prevents the positioner from loosing steps and stops the motor when running into stall.
This enables silent, yet accurate position calibrations during a referencing run and allows semi-closed loop operation when approaching
the mechanical end-stops.
The chip is implemented in I2T100 technology, enabling both high voltage analog circuitry and digital functionality on the same chip.
The AMIS-30624 is fully compatible with the automotive voltage requirements.
2.0 Product Features
Motordriver
•
Microstepping technology
•
Sensorless step-loss detection
•
Peak current up to 800mA
•
Fixed frequency PWM current-control
•
Selectable PWM frequency
•
Automatic selection of fast and slow decay mode
•
No external fly-back diodes required
•
14V/24V compliant
•
Motion qualification mode
Controller with RAM and OTP memory
•
Position controller
•
Configurable speeds and acceleration
•
Input to connect optional motion switch
I
2
C interface
•
Bi-directional 2-wire bus for Inter IC Control
•
Field programmable node addresses
•
Full diagnostics and status information
Protection
•
Over-current protection
•
Under-voltage management
•
Open circuit detection
•
High-temp warning and management
•
Low-temp flag
EMI compatibility
•
High voltage outputs with slope control
•
HV outputs with slope control
AMI Semiconductor
– Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
1
AMIS-30624 I
2
C Microstepping Motordriver
3.0 Applications
Data Sheet
The AMIS-30624 is ideally suited for small positioning applications. Target markets include: automotive (headlamp alignment, HVAC,
idle control, cruise control), industrial equipment (lighting, fluid control, labeling, process control, XYZ tables, robots) and building
automation (HVAC, surveillance, satellite dish, renewable energy systems). Suitable applications typically have multiple axes or require
mechatronic solutions with the driver chip mounted directly on the motor.
4.0 Ordering Information
Table 1: Ordering Information
Part No.
AMIS-30624 PGA
AMIS-30624 PNA
Package
SOIC-20
NQFP-32 (7 x 7 mm)
Peak Current
800mA
800mA
Temp. Range
-40°C…..125°C
-40°C…..125°C
Ordering Code
Tubes
0C624-004-XTD
0C624-005-XTD
Ordering Code
Tapes
0C624-004-XTP
0C624-005-XTP
5.0 Quick Reference Data
Table 2: Absolute Maximum Ratings
Parameter
Vbb
Tamb
Tst
Vesd
(3)
Min.
-0.3
(2)
Max.
+40
(1)
Unit
V
°C
°C
kV
Supply voltage
Ambient temperature under bias
Storage temperature
Electrostatic discharge voltage on pins
-50
-55
-2
+150
+160
+2
Notes:
(1) For limited time <0.5s
(2) The circuit functionality is not guaranteed.
(3) Human body model (100pF via 1.5 kΩ, according to JEDEC EIA-JESD22-A114-B)
Table 3: Operating Ranges
Parameter
Vbb
Top
Supply voltage
Operating temperature range
Vbb
≤
18V
Vbb
≤
29V
Min.
+8
-40
-40
Max.
+29
+125
+85
Unit
V
°C
°C
AMI Semiconductor
– Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
2
AMIS-30624 I
2
C Microstepping Motordriver
Data Sheet
6.0 Table of Contents
1.0 General Description.............................................................................................................................................................................. 1
2.0 Product Features .................................................................................................................................................................................. 1
10.0 DC Parameters................................................................................................................................................................................... 8
11.0 AC Parameters ................................................................................................................................................................................. 10
13.2 Maximum Velocity......................................................................................................................................................................... 13
13.5.1. Position Ranges .................................................................................................................................................................... 15
13.5.2. Secure Position ..................................................................................................................................................................... 15
14.2 Control Logic (Position Controller and Main Control) .................................................................................................................... 16
15.1 Position Controller......................................................................................................................................................................... 17
15.1.1. Positioning and Motion Control.............................................................................................................................................. 17
15.1.3. Position Periodicity ................................................................................................................................................................ 19
15.2 Main Control and Register, OTP Memory + ROM......................................................................................................................... 23
15.2.5. Temperature Management .................................................................................................................................................... 24
15.3.1. Current waveforms in the coils .............................................................................................................................................. 33
15.3.4. Motor Starting Phase............................................................................................................................................................. 34
15.3.5. Motor Stopping Phase........................................................................................................................................................... 34
15.3.7. Electrical Defect on Coils, Detection and Confirmation ......................................................................................................... 35
15.3.8. Motor Shutdown Mode .......................................................................................................................................................... 36
C Bus Description .......................................................................................................................................................................... 39
16.1 General Description ...................................................................................................................................................................... 39
16.3 General Characteristics ................................................................................................................................................................ 40
16.4 Bit Transfer ................................................................................................................................................................................... 40
16.4.1. Data Validity .......................................................................................................................................................................... 40
16.4.2. START and STOP Conditions ............................................................................................................................................... 41
16.5 Transferring Data .......................................................................................................................................................................... 41
16.6 Data Formats with 7-bit Addresses ............................................................................................................................................... 42
16.6.1. Data Transfer Formats .......................................................................................................................................................... 43
16.7.1. Definition of Bits in the First Byte........................................................................................................................................... 44
16.7.2. General Call Address ............................................................................................................................................................ 44
17.0 I
2
C Application Commands............................................................................................................................................................... 45
18.0 Resistance to Electrical and Electromagnetic Disturbances............................................................................................................. 52
20.1 Introduction to Soldering Surface Mount Packages ...................................................................................................................... 55
21.0 Company or Product Inquiries .......................................................................................................................................................... 56
22.0 Document History ............................................................................................................................................................................. 56
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