UCC3806PW

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The UCC3806PW is a buck-boost switch-mode voltage regulator designed for applications that require higher voltage and current conversion, as well as improved efficiency. This DC/DC converter contains a low cost, low noise, high performance PWM controller, which is capable of providing up to 10A continuous output current and 1500Vrms transient voltage protection. The UCC3806PW supports both synchronous and non-synchronous buck-boost switching, making it suitable for applications that require bidirectional current flow. The UCC3806PW operates in either a continuous or discontinuous mode depending on the system needs.

The UCC3806PW works with two primary components: the controller and a set of external power components. The controller is realized using a power MOSFET integrated circuit (PMIC). It integrates all the necessary switches and control functions for providing a stable buck-boost voltage output. The external components include the power diode, inductor, capacitors and resistors. The power diode, which can be either an N-channel MOSFET or a Schottky diode, is used as the free-wheeling diode to return energy to the source when the switch is OFF.

The output voltage is regulated by the controller and is monitored by a voltage sensing circuit. This voltage sensing circuit ensures that the output voltage remains within pre-set limits. The controller works by dynamically adjusting the duty cycle of the switches based on this feedback. This feedback is used to determine the current limit. The inductor acts as a current buffer and filters noise and ripple. It also stores energy when the switch is OFF.

In addition to regulating the output voltage, the UCC3806PW also provides protection features to prevent over-current and over-temperature conditions. Multiple protection features are available and can be flexibly configured by the user. The integrated thermal shutdown feature is based on the temperature of the power MOSFET and provides overload protection. The current limit feature prevents overload conditions from occurring due to momentary overload conditions.

The UCC3806PW is mainly used for DC to DC conversion in battery charging and portable device power applications. It is also suitable for applications requiring bidirectional current flow such as LED lighting, DC motor drives, and power management for devices such as laptops, digital audio players, mobile phones, and tablets. It can also be used in automotive, industrial, and medical applications.

In summary, the UCC3806PW is an efficient, low cost, high performance PMIC buck-boost Voltage Regulator DC/DC switching controller. It contains an integrated voltage sensing circuit and provides overload protection features. It is suitable for applications requiring bidirectional current flow and is mainly used for DC to DC conversion in battery charging and portable device power applications. It is also suitable for automotive, industrial, and medical applications.

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