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26900 – LODI (LO) – Italy - Loc. S. Grato – Z.I. Via del Commercio 2/4 – 9/11 Tel.0039 0371 412318 – fax 0039 0371 412367 Email :
[email protected] Web : www.everelettronica.it
EEA1xx Complete micro-stepping ASIC for 2 phase stepper motors control (suitable for SpotLight and Speed Dome Camera applications) Introduction EEA1xx series ASICs are complete Full Digital controllers around which to build higher quality drives for two phases step motors. They integrate functions of sequencer and drive power stages control and protection against over-current, over /under-voltage and over-temperature. Interfaced to the standard external controls (Step, Direction) or to Synchronous / Asynchronous serial interface the ASICs ensure the highest motor control performance in terms of rotation smoothness. They can execute Micro-stepping movements at resolution of up to 1/128 step with sinusoidal envelope (Maximum step frequency: 2,56 MHz). Besides they feature a motor rotation smoothing tuning functionality to optimize the motor performance in every application in terms of: high speed and torque at shaft low vibrations low resonances
low mechanical noise low heating of the motor simplicity of the drive power stages hardware control
The interface to the drive power stages is designed to offer maximum compatibility with the most popular integrated circuits for the driving of MOSFET and IGBT gates, also being compatible with monolithic integrated circuits. Thanks to the ASICs built in communication field bus (RS232, SPI, I²C), the user can set step angle and phase current of the motor, define type of movement and activate the automatic current reduction at motor standstill and manage digital I/Os, analogue input, and other operations of the drive.
Ordering Information PartNo.
Package Temp. Range Ordering code Pallets (250 units)
EEA1xx-C400-000 32-LQFP -40°C ÷ 105°C EEA1xx-C400-000P250 (Contact EVER for other quantities.) EEA1xx_GB
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Block Diagram Supply & Protections V+
Step (clk_u) n.3 Direction (clk_d) Digital inputs Enable
Optional opto
n.1 Optional opto Digital output
Fault
Bridge Drivers
n.1 Analog input
User's Settings
n.1 Serial Interface
Fieldbus RS232 SPI I²C
Current Sensing GND
EEA100 ASIC
V+
Step Motor
Step Angle Motor Currents
PM
Bridge Drivers
Smoothing Current Sensing
Mode of Operation
GND
Key Features • • • • • • • • • • • • • • • •
user digital inputs: STEP & DIRECTION or general purpose inputs; user digital output: FAULT; user analogue input: general purpose function; serial interface: RS232, SPI, I²C; selection of step angle: Full Step, ½, ¼, 1/8, 1/16, 1/32, 1/64, 1/128; selection of winding currents (max, min, boost); smoothing functionality; operating modes: STEP/DIR or field bus commands; movement types: step / dir, free running, to target position, velocity mode; analogue input for power supply voltage detection (Over/Under-voltage protection); analogue input for drive temperature rise detection (Over-temperature protection); single power supply 3.3 Vdc, 56 mA max; all inputs are 5V-tolerant; the outputs are 3.3V ; package: Low Profile Quad Flat Pack (LQFP) 32 lead, 0,8mm pitch (7 x 7 x 1.4mm), Standard JEDEC MS-026 BBA; working temperature -40°C ÷ +105°C; storage temperature -40°C ÷ +150°C.
EEA1xx_GB
EVER – release 0.0 July 2009
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