UCC28C42DGK

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The UCC28C42DGK from Texas Instruments is a highly efficient and cost-effective PMIC (Power Management Integrated Circuit) designed to convert incoming AC voltage (110V/240V) into a regulated 12V/24V DC output. It is an integrated solution that incorporates a switching regulator, control and protection building blocks, including: power switches, current limit, over-voltage protection, short-circuit protection, thermal shutdown, and over-current status.

This PMIC is designed for off-line flyback and forward converters with greater than 10W output power and it supports both buck and boost topologies. The UCC28C42DGK is available in a single-in-line SMD (Surface Mount Device) package, and it is designed for operation at an ambient temperature of 0 to 85 C, and an input voltage of between 90 to 265V. The UCC28C42DGK is an advanced, compact and highly efficient solution with high power density and ease of use, and it has applications in a wide range of consumer electronic, commercial, and industrial products.

Working Principle

The UCC28C42DGK works by rectifying incoming AC voltage into DC voltage that is smoothed and regulated and then used to drive the output stage. The PMIC contains a power train that consists of a switch, transformer, rectifying diode, storage capacitor, and output impedance for regulation. The UCC28C42DGK is configured as a flyback converter with a Buck/Boost topology, which allows for a wide input voltage range (90 – 265VAC).

The switch controller within the UCC28C42DGK is designed to regulate an output voltage of 12 or 24VDC. It operates by comparing the feedback voltage to a reference voltage and adjusting the pulse width of the switch accordingly. The primary feature of the UCC28C42DGK is Pulse Frequency Modulation (PFM) mode which gives it a high-efficiency operation.

The UCC28C42DGK also features an advanced protection circuit that monitors the input and output voltages, and it is designed to shut-down the PMIC in case of over-voltage, under-voltage, over-current, short-circuit and thermal shutdown conditions. This protection feature ensures stable operation and increased safety.

Conclusion

The UCC28C42DGK PMIC (Power Management Integrated Circuit) from Texas Instruments is a highly efficient and cost-effective solution for off-line converters. It is designed to convert incoming AC voltage into a regulated 12V/24V DC output, and it supports both buck and boost topologies. The UCC28C42DGK has a high power density and ease of use, and it has applications in a wide range of consumer electronic, commercial and industrial products.

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