UC2638DW Integrated Circuits (ICs)

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Power management controllers, such as the UC2638DW, are responsible for controlling the energy management of a device. The UC2638DW is a versatile power management integrated circuit (PMIC) that is used in motor controllers and drives to provide high efficiency and robust operation over a wide temperature range. In this article, we’ll look at the UC2638DW’s application fields and working principles.

Application Field

The UC2638DW is a highly integrated motor drive and control IC developed by Texas Instruments. It is designed to power both brushed and brushless motors in a wide variety of applications. These include robotic and automated motions, pumps, kitchen appliances, portable tools and toys, electric vehicles, and irrigation systems. The UC2638DW provides excellent power conversion efficiency and supports high-speed current mode control. It also supports a range of operating supply voltages from 4.5V to 17V.

The UC2638DW is equipped with several features that improve system performance and simplify design. These include configurable dead-time protection and adjustable over-current protection. It also has configurable PWM outputs and an embedded bootstrap diode. The IC’s integrated circuit protection features also include over-voltage and under-voltage protection.

The IC includes an integrated digital fault-logging system that records system faults and stores them in a non-volatile memory. This allows the system to be monitored remotely and the errors can be detected quickly and addressed, if necessary.

Working Principle

The UC2638DW features an advanced three-phase, full-bridge driver with an integrated transconductance PWM modulator. This allows for smooth and accurate current control across the three legs of the bridge driver. The three-phase bridge driver supports brushless, brushed and stepper motor configurations.

The UC2638DW’s integrated PWM modulator utilizes a symmetrical current-mode control with a dual-channel input current loop. This ensures smooth and accurate motor current control and reduces unwanted motor vibration. The PWM control system adjusts the current and voltage in the three legs of the bridge, allowing for very precise and efficient control of the motor and high dynamic response.

The UC2638DW also features various safety features. These include configurable dead-time, configurable over-current protection, and adjustable over-voltage protection. It also includes a short-circuit protection system and integrated circuit protection features, such as a bootstrap diode.

The UC2638DW is a powerful and efficient power management IC ideal for a wide range of motor control applications. It features a three-phase full-bridge driver and a high-speed dual-channel input current loop. The IC’s integrated safety features ensure reliable and robust operation. Its configurable dead-time, adjustable over-current protection, and adjustable over-voltage protection help to protect the system from damage due to excessive current or voltage. The IC’s integrated digital fault-logging system helps system designers detect and address faults quickly and remotely.

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