UCC2808AD-2

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UCC2808AD-2 is an adaptive voltage mode controller which has been developed by Texas Instruments, and is part of the family of PMIC – Voltage Regulators – DC DC Switching Controllers. It combines a 600V power MOSFET and low-side gate driver, allowing for a load-switch current path to be established and negated with a single control, requiring minimal external components. The device provides superior noise immunity, reliability, and high-frequency operation, creating an effective and efficient high-current switch solution.

The application field of UCC2808AD-2 is wide, including regulated DC power supplies, telecom and datacom, distributed power management, H-bridge motor controls and switching amplifier loads. This high-efficiency, current-mode controller is suitable for a range of high-current switch designs, including step down (Buck) and step up (Boost) topologies, all featuring adjustable thresholds with precise current limiting.

The working principle of UCC2808AD-2 can be best explained with Buck and Boost topologies. In Buck, the UCC2808AD-2 operates with a low-side power MOSFET on the source and a sensing resistor across the switch, allowing the controller to regulate the output voltage. The device senses voltage (V) levels and uses the sensed current related to the output and power switches to regulate the output voltage. The device also contains an adjustable current limit feature, which is used to ensure that the switch is not subject to an overload condition. In Boost, the device operates with a high-side N-channel MOSFET on the input and a sensing resistor on the output. The voltage at the control pin (V) is compared with the inductor current, and the output voltage is regulated accordingly. The inductor current is limited with an adjustable current feature, ensuring that the switch is not overloaded.

UCC2808AD-2 devices come in a variety of package types, including SOP-8, TSSOP-8 and SOIC-8, allowing for easy integration into existing systems. With a power output range of 10A and a switching frequency up to 1MHz, UCC2808AD-2 can be used for a variety of applications requiring power conversions. It also features an adjustable frequency control, allowing the switching frequency to be adjusted to the optimum for each application. With its adjustable thresholds and precision of current limiting, UCC2808AD-2 makes an effective and efficient switch solution.

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