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H-bridge driver IC provides highest integration level

Posted: 10 Sep 2007     Print Version  Bookmark and Share

Keywords:H-bridge driver  MCU  DC motor system 


Atmel Corp. has rolled out the ATA6823 H-bridge driver IC designed using Atmel's 0.8?m BCD-on-SOI technology (SMARTIS). The ATA6823 is claimed to provide the industry's highest integration level and includes all functional blocks needed for a complete MCU-controlled DC motor system in H-bridge configuration. The ATA6823 extends Atmel's broad driver family and is designed to control different external power N-MOSFETs. The device can be used with currents ranging from 1.5A to over 100A, making it suitable for different applications.

The ATA6823 is a complete system IC that, in addition to the driver stages, includes several functional blocks. These include a pin-adjustable 5V/3.3V voltage regulator that supplies the external MCU, a programmable window watchdog that works independently from the MCU's clock; and the same LIN transceiver IP as found in Atmel's LIN2.0 transceiver ATA6662. No other device available on the market includes all these functions in one package, said Atmel.

The ATA6823's control logic takes over timing functions normally handled by the MCU. These timing functions are used to protect external transistors by preventing cross-conduction. Hence, use of the ATA6823 reduces programming efforts of system designers as only two MCU functions, motor direction and PWM mode, need to be programmed. This facilitates faster, more stable designs and a shorter time to market.

The IC also provides a very low current consumption, less than 45 microamps in sleep mode, which reduces current consumption for battery-powered systems.

Like all Atmel's driver ICs, the ATA6823 offers a broad range of protection features for undervoltage, overvoltage, short circuit and overtemperature. It also meets strict automotive qualification demands (protection against conducted interference, EMC and ESD) and can withstand transients as specified in ISO/TR 7637.

Samples of are now available in RoHS-compatible 7mm x 7mm QFN32 packages. Pricing starts at Rs.91.01($2.25) for 10,000-piece quantities. An application board for development support can be ordered at Rs.5,258.28 ($130).

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