0C622-004-XTP

AMI Semiconductor AMIS-30622 Stepper Motordriver & Controller with I2C Bus & Microstepping Features AMIS-30622 - Stepper Motordriver & Controller Feature Sheet Key Features Motordriver • Microstepping (1/2, 1/4, 1/8, 1/16) • Programmable peak current up to 800mA • 20kHz PWM current control • Automatic selection of fast and slow decay mode • Internal fly-back FETs • Fully integrated current sense • 8V-29V supply voltage • Automotive compliant • Full diagnostics and status information • 5V reference voltage pin Programmable Controller • Position controller • Configurable speeds, acceleration and deceleration • Programmable hold current • Programmable 'safe position' • Customized default setting in non-volatile memory (OTP) • Movement/position sensor input Protection and Diagnostics • Over-current protection • Under-voltage management • Over-voltage protection • High-temp warning and shutdown • Low-temp warning • Detection of open and shorted motor coils • Management of safe position Serial Bus Interface • 2-wire I2C serial interface • 5V microcontroller compatible • Up to 32 node addresses EMI Compatibility • Power drivers with slope control Product Description The AMIS-30622 is a stepper motordriver with position controller and control/diagnostics interface integrated in one single chip. The product is ready to be connected as a peripheral device to a microcontroller with minimal loading of the microcontroller. The chip receives high level positioning instructions through the I²C interface and subsequently drives the motor coils until the desired position is reached. The on-chip position controller is configurable for different motor types, positioning ranges and parameters for speed, acceleration, deceleration, hold current, safe position. Six OTP bytes are available to set default values, and can be overruled by values programmed through the I2C bus. The AMIS-30622 acts as a slave on the serial bus and the master can fetch specific status information like actual position, error flags, etc. from each individual slave node. Applications and Benefits The AMIS-30622 is ideally suited for small positioning applications. Target markets include automotive, industrial equipment and building automation. Applications of interest have typically multiple axes. The high abstraction level of the product’s command set reduces the load of the processor on the master side. Scaling of the application towards number of axes is straight-forward: hardware and software designs are extended in a modular way, without severely affecting the demands on the master microcontroller. The I2C bus structure simplifies PCB track-layout and/or wiring architectures. Microstepping operation removes the design trade-off between minimal operation speed and avoiding the risk of noise and step loss due to resonance phenomena. All these benefits result in reduced system cost and timeto-market and improved technical performance. Part N° Package Peak Current Ambient Ordering Code - Tube at Max. Temp. Temperature Ordering Code - Tape AMIS-30622-AGA SOIC-20 800mA -40°C...125°C 0C622-003-XTD 0C622-003-XTP AMIS-30622-ANA NQFP-32 (7mm x 7mm) 800mA -40°C...125°C 0C622-004-XTD 0C622-004-XTP Functional Block Diagram SWI I 2C Interface I 2C Position Controller HW MOTXP PWM regulator X Controller + TST - MOTXN I -Sense Decoder Main Control Registers OTP - ROM Sinewave Table DAC's 1 MHz Temp sense Vref Oscillator MOTYP PWM regulator Y Voltage Regulator + Charge Pump - MOTYN I -Sense VBB VDD CPN CPP VCP GND C1 220 nF 220 nF VBAT C4 100 µF C3 CPN VDD 1 µF I2C bus 9 CPP 10 C5 VCP 11 100 nF Typical Application VBB 12 C6 VBB 19 3 20 SDA 1 18 SWI C2 AMIS-30622 16 MOTXP MOTXN SCK 2 M 15 Connect to VBAT or GND 100 nF R1 HW 8 13 5 1 kΩ TST1 6 TST2 4 7 GND 14 MOTYP MOTYN 17 PC20070111.7 AMI Semiconductor www.amis.com Devices sold by AMIS are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. AMIS makes no warranty, express, statutory, implied or by description, regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. AMIS makes no warranty of merchantability or fitness for any purposes. AMIS reserves the right to discontinue production and change specifications and prices at any time and without notice. AMI Semiconductor's products are intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing by AMIS for such applications. Copyright ©2007 AMI Semiconductor, Inc. M-20654-001 AP AMIS-30622 - Stepper Motordriver & Controller Feature Sheet Ordering Codes