UCC28C40DGKRG4

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The UCC28C40DGKRG4 is a regulator IC belonging to the family of DC to DC switching controllers. It is an integrated circuit (IC) designed for a broad range of applications, including standard offline power supplies and current-mode, resonant-mode, and interleaved-mode converters, using existing topologies.

Overview

The UCC28C40DGKRG4 DC to DC switching controller, produced by Texas Instruments, is the enhanced version of UCC18C40. It features a low on-resistance and drain-source output to at least 1.5 md. The device features 4-pin PQFN package, an external PWM feedback, an adjustable frequency range from 0.1 MHz to 5 MHz, dead-time adjustment, and frequency synchronization to other devices. The device also features an overvoltage lockout (OVL) function, adjustable undervoltage lockout (UVL) and overvoltage lockout (OVL) protection, internal current limit protection, and integrated bias winding.

Application Field

The UCC28C40DGKRG4 is designed with a large bandwidth, a high-switching frequency, and integrated safety features to help deliver reliable power conversion performance. The IC is ideal for a variety of offline power supply applications, such as high-end HDTVs, PC Power Supplies, Home/Office Automation, Industrial Motors/Drives, Solar Inverters, and more.

Working Principle

The UCC28C40DGKRG4 operates by sensing the output of an isolated DC to DC flying capacitor converter and controlling the switching of its associated power MOSFETs in accordance with the external PWM comparator feedback voltage. This IC has the capability to switch a large MOSFET with up to 4A peak current and 20ns rise/fall times by using a low-side driver, which works by turning off the drain-source MOSFET the moment the PWM comparator output drops below the logic level. This helps to reduce the energy loss due to switching losses. The device also features an adjustable frequency range up to 5 MHz and a wide operating temperature range of -40°C to 125°C.

Integrated Safety Features

The UCC28C40DGKRG4 features integrated safety features to ensure that the power supply is reliable and safe. The integrated safety features include overvoltage lockout (OVL) protection and adjustable undervoltage lockout (UVL) protection, ensuring that the output voltage will never exceed a preset limit. Moreover, the device features an internal current limit protection which detects the current level in the power switch and will shut off the switch if it is detected too high.

Conclusion

The UCC28C40DGKRG4 is a versatile regulator IC designed for a broad range of DC to DC switching control applications. It features a wide frequency range, an adjustable dead-time, an integrated low-side driver and current limiter, adjustable overvoltage and undervoltage protections, and integrated safety features. It is suitable for applications such as high-end HDTVs, PC Power Supplies, Home/Office Automation, Industrial Motors/Drives, Solar Inverters, and more.

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