Atmel Announces the ATA6843 and ATA6844 Integrated System Basis Gate Driver ICs for BLDC Motor Control Applications
Atmel Corporation announced the ATA6843 and ATA6844, the new set of highly-integrated system basis gate driver ICs. The Atmel ATA6843 and ATA6844 devices are new members of the company’s extensive gate driver family designed for 3-phase brushless DC (BLDC) motor control applications including turbo chargers, waste gates, EGR, pumps, fans, power window, power doors and power seats. 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 new driver ICs are the only products in the industry to 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.
The new Atmel ATA6844 is a high-temperature version to operate at chip temperatures of up to 200°C. The device is manufactured in Atmel’s own state-of-the-art BCD-on-SOI technology SMART-I.S.™ for extreme temperatures, and enables direct attachment of the ECU to hot actuators for short wiring and optimized construction.
ATA6844 contain comprehensive protection and diagnostic functions, such as monitoring of overtemperature, overvoltage, undervoltage, short-circuit conditions and charge-pump failures. All incidents are communicated via three-diagnostic outputs to the microcontroller to enable appropriate countermeasures. A coast function allows simultaneous disabling of all six output stages in case of emergency. The on-board integrated watchdog independently monitors the MCU to increase the overall system safety, eliminating an additional external component. Dangerous short-circuit currents caused by faulty control signals are prevented from the pin-programmable timer stage that allows users to set a dead time for disabling unintended simultaneous activation of a high-side and a low-side power MOSFET within one branch.
Samples of the ATA6843 and ATA6844 are available now, both in QFN48 7 x 7mm packages. Pricing starts at USD $2.10 (ATA6843) and $2.40 (ATA6844) for quantities of 10,000. To simplify and speed-up bench tests, pre-programmed ATA6843/44 design kits for sensorless or Hall sensor type BLDC motors are also available.
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ATA6843 and ATA6844 Gate Driver ICs Block Diagram
(Picture from Atmel Website)
More information about gate driver ICs can be found at Atmel Website
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