UCC3809DTR-2

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PMIC stands for Power Management Integrated Circuit – today’s semiconductor devices needed for using in circuitry for controlling power. This includes AC/DC converters, offline switchers, and other diversified components. UCC3809DTR-2 is a PMIC manufactured by Texas Instruments and it is suitable for providing wide range of voltage levels. UCC3809DTR-2 comprises of PWM controller, current mode control and a power MOSFET step down converter. Converters feature a wide input range of 8.5 V to 40 V and a wide output voltage range of 0.905 V to 37 V in fixed output voltage version. The UCC3809DTR-2 is a compact and simple solution for providing a regulated output voltage in applications with low to medium power requirements such as consumer electronics, healthcare systems and mobile computing.

The UCC3809DTR-2 is mainly designed according to the features of TI’s robust current mode control PWM controller. This controller provides superior AC/DC transient performance and fast loop compensation. Additionally, its unique hysteretic current limit architecture removes the requirement for external to provide true constant current regulation for a wide range of input voltages. The UCC3809DTR-2 also features an on board ±2.5% accurate reference which means the set output voltage is smooth and stable even if the supply voltage is varying.

The working principle for UCC3809DTR-2 is based on the 4-switch buck topology. The output voltage is regulated via pulse width modulation of four sets of internal power MOSFETs. All four MOSFETs are operated in a synchronous rectification mode, producing low switching losses and high efficiency at a wide input voltage range. The switching frequency is adjustable in the range of 2.3 to 6.5MHz. To facilitate synchronization to the external clock, there is an external clock input pin.

The UCC3809DTR-2 can be used in many application fields, such as LED lighting, industrial equipment, and consumer electronics. It is also certified with meeting CISPR25 Class B that is critical for automotive applications depends on the power levels. Furthermore,the device also provides over voltage and over current protection, as well as reverse battery protection, making it ideal for systems where robustness and high reliability are necessary.

To sum up, UCC3809DTR-2 is a power management integrated circuit (PMIC) specifically designed to provide wide range of voltage levels. Its unique features make it suitable for many application fields, such as LED lighting, consumer electronics and automotive applications. It utilizes TI’s robust current mode control PWM controller and a four switch buck topology to ensure superior AC/DC transient performance and fast loop compensation.

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