UCD3138RMHT Integrated Circuits (ICs)

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UCD3138RMHT is an integrated digital power supply controller newly released by Texas Instruments. It features integrated voltage and current monitoring, precise analog and digital control, fine-grained lighting dimming control and precise current limit protection, making it the perfect choice for micro power electronics applications. With the help of its powerful loop control architecture and integrated logic, the UCD3138RMHT makes it easy to design and integrate power supplies for applications including embedded systems, data centers, IoT, and other sensitive electronic equipment.

Application Field

The UCD3138RMHT is designed to enable precise voltage or current control in both medium and high frequency switching power supplies. With its fast digital control loop, it can take over new reference voltage even faster than traditional analog solutions, making it the ideal controller for applications including digital cameras, set-top boxes, LANs, and home entertainment systems. Along with its digital control capabilities, it can also reduce system costs by increasing power conversion efficiency, limiting component size and weight, and eliminating extra cables and filters.

The UCD3138RMHT is also a great solution for high resolution display applications such as OLED and LCD TVs. With its wide range of specialized features like precision lighting dimming control and programmable step-down converters, this controller makes it easy to customize power settings for displays that require precise power supply control. Additionally, its embedded monitoring and protection functions such as overvoltage, undervoltage, and overcurrent provide an effective safeguard against system damages.

Working Principle

The UCD3138RMHT utilizes a three-phase voltage mode power topology for high efficiency and application flexibility. Its three phase output is achieved with a high-speed clock and two digital control loops. The clock and digital control loops work together to sense, control and limit the output of the power supply. The digital control loops allow the controller to precisely adjust the switching frequency and duty cycle in order to maintain a stable output voltage and current.

The clock and digital control loops also enable the UCD3138RMHT to achieve highly accurate current and voltage monitoring, which results in improved efficiency and extended operating life. The controller comes with two dedicated pins that can be used to measure and monitor the voltage and current of the power supply. The integrated logic and protection circuits also provide overvoltage, undervoltage and overcurrent protections for the loads.

In addition to voltage and current monitoring, the UCD3138RMHT also offers advanced light dimming control to further improve energy efficiency. The controller allows exact voltages to be adjusted through the built-in PWM driver, enabling the LED dimming effect. This helps to provide increased system-level energy savings and a more uniform light output.

The UCD3138RMHT is a great integrated digital power supply controller, and its vast range of features make it the ideal choice for a wide range of applications. From digital cameras and set-top boxes to high resolution displays, it has all the features necessary to customize and control power supplies with precision, accuracy and efficiency.

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