UCC3807D-2G4

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UCC3807D-2G4 is a family of current-mode-controller integrated circuits produced by Texas Instruments which can be classified under PMIC (Power Management Integrated Circuit) – AC DC Converters, Offline Switchers. The device is designed for the cost effective implementation of universal input and output offline power supplies. It is primarily used for the fast and easy implementation of low cost, low power, single stage designs of up to 400 watts.

The UCC3807D-2G4 is optimized for high efficiency, low standby and no load power consumption to reduce emissions of EMI noise from the power supply. With its state-of-the-art, low-noise SMPS controllers, it enables Longer lifetime of system products and extended warranty coverage with reliable power for newly designed and existing products.

Application Fields: The UCC3807D-2G4 is suitable for applications such as desktop computers and entertainment systems. This IC is also suitable for Notebook, notebook adapters and servers, printer, car power adapters, consumer power adapters, cell phone chargers and other small ITE (Information Technology Equipment) and home appliance applications.

Working Principle: This IC is based on a Current Mode Control topology that provides excellent load and line regulation, as well as inherent protection. It is an advanced current-mode Switched Mode Power Supply (SMPS) controller designed to provide excellent performance in either Input Voltage (VI) mode or Constant Voltage Mode (VC). In VI mode, the output voltage is controlled by the measured input voltage. In VC mode, the output voltage is regulated by adjusting on-time of the primary switch voltage. This primary switch on-time is sensed and controlled them by the voltage on the VCOMP pin. The peak current through the primary switch is sensed so that IC can detect the fault and shutdown protection. The output voltage is further enhanced by the UCC3807D-2G4’s output voltage feedforward (OVFF) architecture.

It also provides comprehensive, system-level protection for overvoltage, undervoltage, overcurrents and overtemperatures. This robust device is capable of driving large MOSFETS and provides superior immunity to constantly changing line and load disturbances. The UCC3807D-2G4 is easy to implement and programmable for portability of the power supply design.

The UCC3807D-2G4 is available in a highly integrated 16-pin HVQFN package and implements the control loop in an easy-to-understand fashion. It is capable of generating high frequency switching transients, which allow the design of power supplies that are small in size, light-weight and lower cost, yet provide a high quality output.

The UCC3807D-2G4 features an internal soft start, automatic slope compensation and under-voltage lockout. In addition, the device offers an open source design to develop predictable and repeatable control over the switching frequency, while minimizing EMI noise. This is because the frequency of the switch can be adjusted through the control loop, ensuring the highest performance level.

In conjunction with other LED controllers from Texas Instruments, the UCC3807D-2G4 provides integrated LED lighting solutions for applications such as LED drivers, LED lamp/fixture ballasts, LED panel arrays and LED system lamps or fixtures. With its cost-effective, high-performance control, it enables efficient and simplified power conversion solutions.

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