ATA6839-PXQW

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Introduction: The ATA6839-PXQW from Atmel is an automotive power management IC (PMIC) designed for driving multiple brushless DC motors and stepper motors. This device supports the full-bridge and 3-phase H-bridge motor drive configurations. ATA6839-PXQW is designed to provide the correct current to each motor phase, and offers a wide range of output current-limit options.

Features:

• Accommodates multiple-motor configurations, up to six brushless DC or stepper motors
• Low power consumption: >95% efficiency
• Power-save features: low power consumption, software-controlled low-power modes
• Soft switching techniques for lowering electromagnetic interference (EMI) and power consumption
• 5V or 12V supply voltages
• Over-temperature protection
• Fault detection and reporting

Application Field:

The ATA6839-PXQW is ideal for automotive applications such as electric power-assisted steering (EPAS) systems, electric brake systems, active air suspension, and anti-lock braking systems. It can also be employed in other applications such as industrial motors, home appliances, fans and pumps, and general motor control.

Working Principle:

The ATA6839-PXQW relies on pulse-width modulation (PWM) to provide the proper current to each motor phase. It utilizes a current-limiting feature to protect the device and the motor from excessive current flow. The device can be configured for single- or double-ended PWM operation and for various frequency ranges. This allows for a wide range of output current limit options.

The ATA6839-PXQW utilizes a charge pump to generate the gate drive voltage and employs level shifters to convert from the higher-voltage gate drive to the low-voltage gate drive. This allows the device to operate from a wide range of power supply voltages. The device also incorporates several safety features, including over-temperature protection, fault detection, and reporting.

In addition, the device has an adjustable output current limit that can be used to limit the amount of current drawn by the motor. This current limit can be programmed to a value between 0.6A and 7A, including 1A, 2A, 3A and 4A options.

Finally, the ATA6839-PXQW includes several power-saving features, including sleep modes and low-power modes, which can help reduce power consumption and extend battery life.

Conclusion:

The ATA6839-PXQW is a versatile and powerful PMIC designed for driving multiple brushless DC motors and stepper motors. It provides the correct current to each motor phase and has a wide range of output current limit options. In addition, it utilizes several power-saving features, including sleep modes and low-power modes, to reduce power consumption and extend battery life. The ATA6839-PXQW is an ideal choice for automotive applications such as electric power-assisted steering systems, electric brake systems, active air suspension, and anti-lock braking systems, as well as for other general motor control applications.

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