UCC28C43DGK

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The UCC28C43DGK is an integrated current-mode pulse-width modulation (PWM) controller designed for high speed and low power voltage conversion. The device integrates two synchronous N-Channel MOSFET switches with a system-steady state more efficient than traditional analog designs. Operated by an externally supplied clock, the pulse-width modulation control also allows for a smooth transition from PWM to linear control for down-mode operation.

The UCC28C43DGK is typically used in a variety of applications where high efficiency, low power consumption and high speed is required including industrial, automotive, communications, and power adapter applications. The UCC28C43DGK is also ideal for small, isolated power supplies. It can be used as both a single-phase and multi-phase PWM controller, providing flexibility and system stability.

The device can be used for buck, boost, buck-boost and flyback topologies, and it’s particularly well-suited for replacement of linear regulators. The UCC28C43DGK utilizes current-mode PWM control with adaptive on-time control driven by an internally generated PWM frequency or externally supplied clock. This topology allows for accurate primary to secondary synchronous rectification and is therefore ideal for high efficiency designs. The device also has a number of protection features including over-voltage, input under-voltage, and over-temperature protection.

UCC28C43DGK is based on the voltage-mode control architecture, the system has very good transient performance, is extremely fast, and remains stable under all load conditions. The PWM control method used in the UCC28C43DGK ensures a smooth transition from PWM to linear control, providing improved system efficiency and lower output power dissipation.

Another advantage of the UCC28C43DGK is in its ability to operate as a voltage regulator. By using a constant on-time (COT) control and operating with a fixed switching frequency, the device can efficiently regulate output voltage under all line and load conditions. The device also has soft-start and line start-up circuits. The device’s linear regulator mode provides a low standby current and fast line transient response.

Finally, the device also integrates an adjustable current limit for overload protection, as well as an auxiliary winding for multi-phase applications. All of these features combined make the UCC28C43DGK an excellent choice for high efficiency, low power consumed and high speed applications.

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