UCC2806DWG4

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The UCC2806DWG4 is a synchronous-rectified boost controller, mainly used in voltage regulator applications. The controller is adapted to regulate the output of power stages up to 8A. It provides up to 8A of output current with a wide range of input/output voltages, making it suitable for a variety of battery-powered systems. It also supports programmable switching frequency and adaptive minimum off-time for improved system efficiency.

The main functional block of the UCC2806DWG4 is the burst mode operation, optimized for minimum power losses, especially in light load applications. It includes an error amplifier, an over voltage protection (OVP) block, a line feed forward, a low side driver, a synchronous rectifier FG, an adaptative dead time control and a voltage reference. The error amplifier allows the user to set the desired output voltage by applying modulation voltage to the non-inverting input (FB). The error amplifier output is the driving force that varies the width of the internal Pulse Width Modulation (PWM) signal being propagated to the power switches.

The UCC2806DWG4 features a variety of protection circuits which protect against overloads, over-currents, over/undershoot, and input/output overvoltage. The output voltage is monitored to avoid an excessive voltage at the output. It includes a low side driver with a fixed turn-on and adjustable turn-off protection. The over voltage protection prevents the output voltage from exceeding the threshold set by the OVP voltage. The adaptative dead time control can be adjusted to allow setting of the optimized current limit against the feedback voltage.

The UCC2806DWG4 is typically used for DC-DC conversion applications such as step-up, step-down and inverting topologies. It provides optimal performance for input/output voltages of up to 80V and 8A peak current in a compact 5x5mm QFN package. The switching frequency is programmable and directly affects the size of the components used in the power stage. The adaptative minimum off-time feature allows a fast response to fast load transients.

In summary, the UCC2806DWG4 is a high performance boost controller suitable for use in DC-DC converter applications. Its optimized operation ensures low power losses, while its comprehensive protection system ensures the safe and reliable operation of the device. It is available in a small 5x5mm QFN package and is perfectly suited for a variety of battery-powered systems.

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