UCC28880DR Integrated Circuits (ICs)

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The UCC28880DR is an application field and working principle suitable for offline switching. It is a current mode Pulse Width Modulated (PWM) controller incorporating an internal high side and low side MOSFET Drivers. The device is suitable for a wide input voltage range from 90VAC to 305VAC and includes the Power Factor Correction feature to enable the system to comply with international safety requirements. These features provide a unique design solution for an Off-Line Switcher with extremely low component count for high integration and cost savings.

Application Fields

The UCC28880DR is applicable in AC/DC converter fields, as well as other offline applications. Such include offline switching and lighting systems, home appliances, power supplies, and cooling systems.

Working Principle

The working principle of the UCC28880DR is as follows:

The device internally generates two PWM signals. The first signal is referred to as the high side PWM and controls the high side P-channel MOSFET Driver. The second signal is known as the low side PWM and drives an N-channel MOSFET Driver. The device integrates a Power Factor Correction feature on-chip which enables the system to meet international safety requirements. The combination of the high side and low side PWM signals are used to drive an external primary side MOSFET bridge, where the MOSFET bridge controls the power to an external load. The device output voltage is monitored and optimized by an externally connected DC/DC converter, which further improves the power line regulation and switching performance.

Summary

The UCC28880DR is an internal high side and low side MOSFET Driver with up to 9A source and 18A peak current capability. It includes a Power Factor Correction feature to enable the system to comply with international safety requirements, making it suitable for a wide input voltage range from 90VAC to 305VAC and for offline switching applications in various parts of the home, including lights, appliances and cooling systems. The device is cost effective and provides a unique design solution for an Off-Line Switcher with extremely low component count for high integration and cost savings.

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