eDrive 2011 Resource Guide - (Page 26)

Power ManaGeMent High Speed, High Voltage, Quad-Channel Differential Line Drives with High Output Drive Current Integrated Gate Driver ICs for Automotive BLDC Motor-Control Applications LSI/CSI has released the new high speed and high voltage Quad-Channel Differential Line drivers with high output drive current. Designated LS7272 and LS7273, these Quad Channel Differential Line drivers operate over an input voltage range of 4.5 volts to 30 volts and can operate up to 4 MHz. The line drivers also have a built-in output drive thermal shutdown protection in case of overload. These fully Tri-Stateable outputs can be configured to be push-pull or open drain. The LS7272 has an input to select either push-pull or open drain outputs with the loads on the open drain outputs returnable to the power supply voltage or lower. The LS7273 has only open drain outputs with the loads returnable to voltage independent of the power supply voltage up to maxi-mum of 30 volts. There are four independent CMOS/TTL compatible inputs with hysteresis and eight short circuit proof true and complementary outputs. Atmel Corp. has released a new set of integrated system basis gate driver ICs. The Atmel ATA6843 and ATA6844 devices are new members of the company’s gate driver family designed for three-phase brushless DC (BLDC) motor control applications. They feature six-output stages for direct motor control when combined with an Atmel AVR microcontroller (MCU) and an on-chip Atmel automotive LIN transceiver IP for in-car communication. The driver ICs incorporate all the essential functional blocks to supply and monitor a microcontroller in BLDC motor control applications. This feature enables a smaller footprint for applications with limited space and increases the overall system safety. With most automotive BLDC motor applications located in hot under-the-hood environments, the ability to withstand extremely hot temperatures is a device requirement. The new Atmel ATA6844 is a high-temperature version to operate at chip temperatures of up to 200°C. Atmel automotive-qualified AVR microcontrollers are well suited to support the new system basis gate driver ICs in various BLDC motors with Hall sensors as well as sensorless BLDC motors with back-electromagnetic force (BEMF) sensing. With the devices’ six input stages, the MCU individually controls each of the six output stages. The MCU also defines the adjustable overcurrent detection threshold of the ATA6843/44 to enable a current monitoring tailored to the various types of power MOSFETs used in the application. 26 2011 Resource Guide www.e-DriveOnline.com http://www.infowebcom.com http://www.infowebcom.com http://www.e-DriveOnline.com

Table of Contents for the Digital Edition of eDrive 2011 Resource Guide

eDrive 2011 Resource Guide
Industrial Motors and Drives Markets Poised for Strong Growth in 2011
AC Motor & Drive Systems
Automation Components
Automation Systems
Brakes & Speed Reduction
Brushless Motors
Cables
Canned Hermetic Motors
Capacitors
Coils & Coil Windings
Components
Connectors
Consulting Services & Training
Controls & Switches
Converters
Couplings
DC Motor & Drive Systems
Displays & Interfaces
Drives
Electric Actuators
Electric Motors & Systems
Electric Motor Repair
Electronic Systems
Enclosures
Encoders & Sensors
Energy Efficiency
Explosion-Proof Motors
Filters
Gear Boxes, Heads & Reducers
Gear Motors
Hydraulic Pumps & Motors
ICs & Semiconductors
Instruments
Insulation Materials
Linear Motor & Drive Systems
Magnets
Micro Motors
Motion Control Systems
Noise & Vibration Control
Nuclear Motors
Permanent Magnet DC Motors
Power Supply & Conversion
Repair & Maintenance
Rotary Motor & Drive Systems
Safety & Testing Equipment
Servo Motors
Software
Solar Power
Stepper Motors
Thermal Control
Transformers
Variable Speed Motors
Wind Power
Motors & Drives
Power Management
Motion Control
Industry News
Marketplace
Calendar of Events

eDrive 2011 Resource Guide