UCC2891PWG4

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UCC2891PWG4 Application Field and Working Principle

The UCC2891PWG4 is a 2.7 V to 57 V, 9 A/11 A Peak, dual high-side, low-side driver. It is part of the EZ 12 family of automotive pulse width modulation (PWM) controllers, which operate up to 5.5 MHz with very low power loss and excellent temperature characteristics. It is available in an 8-pin SOIC package.

The UCC2891PWG4 is designed for automotive applications as a DC-DC switching controller for either buck, boost, buck-boost, or SEPIC (Single Ended Primary Inductance Converter) systems.

Key Features

• 2.7 V to 57 V operation
• 9 A/11 A Peak low-side, high-side drive current
• PWM control frequency range up to 5.5 MHz
• Integrated capacitor charge pump
• Deglitch time of 1 µs
• Protection features to minimize failure modes
• Excellent temperature characteristics
• Fixed frequency or fast transient response
• Programmable peak current limit
• Adaptive gate drive

Working Principle

The UCC2891PWG4 is a dual high-side, low-side driver designed for many common DC-DC switching configurations, such as buck, boost, buck-boost, and SEPIC. The driver offers integrated capacitor charge pumps, deglitch time of 1µs, excellent temperature characteristics, and a programmable peak current limit for over-current protection. The controller can be used in either fixed frequency or fast transient response mode.

The controller is designed to reduce switching losses, increase current throughput, and provide high-fidelity industry-standard control. The UCC2891PWG4 features an adaptive gate drive, which reduces EMI (electromagnetic interference). This feature helps to ensure that the switching converter meets the applicable EMC (electromagnetic compatibility) standards.

In addition to its high switching frequency, the UCC2891PWG4 has integrated protection features, such as over temperature and reverse polarity protection, to minimize failure modes. The controller also has an adjustable soft-start, to ensure smooth input current ramping and avoid current surges.

Applications

The UCC2891PWG4 is designed for automotive applications such as DC-DC power conversion, battery charging, sensor, and motor control. It can be used in battery-powered automotive applications, automotive displays, automotive power sources, automotive power supplies, portable electronic systems, and point-of-load applications.

The driver is also well-suited for many industrial applications, such as HVAC (heating, ventilation, and air conditioning), pumps, compressors, motor control, white goods, and any application that requires a high efficiency, low noise driver.

Conclusion

The UCC2891PWG4 is a high-performance switching controller for automotive and industrial applications. It offers excellent temperature characteristics, low power loss, and integrated protection features. It is well-suited for DC-DC buck, boost, buck-boost, or SEPIC applications and can operate up to 5.5 MHz with a deglitch time of 1 µs.

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