UCC2818ADRG4

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The UCC2818ADRG4 is a peak current-mode control integrated circuit that can be used in a power factor correction (PFC) application such as offline ac-dc power supplies. It is designed to provide a single-stage active PFC with a wide range of input and output power levels. The device can be used to control a buck, boost, buck-boost or resonant power converter.

The UCC2818ADRG4 is capable of achieving a wide input voltage range due to the presence of an adaptive dead-time control. This prevents the body diode current limiting when the input voltage drops. The device also features a high voltage start up circuit and a variable current limit topology.

The internal compensation of the UCC2818ADRG4 enables a fast response, high-performance system and can be optimized for a wide range of switching frequencies, input voltages, and inductor values. The device is also capable of providing a true load current crest factor by effectively limiting the peak current and improving the efficiency of the system.

The UCC2818ADRG4 is designed to operate in a peak-current-mode control circuit with over current protection. The device also features a voltage clamp circuit that monitors the drain voltage, and a cycle-by-cycle over-current detection and protection circuit, which provides reliable protection against overloads.

The UCC2818ADRG4 supports high-efficiency, high-power factor (PF) conversion. In addition, the device provides constant-voltage and constant-power outputs, with accurate and fast line/load transient response. The device also provides many protection features, such as over current and over temperature protection, under voltage lockout (UVLO), and over voltage protection.

The UCC2818ADRG4 also features a low-jitter PFC current ramp generator, which provides improved control loop stability. The device provides a wide range of control options, such as cycle-by-cycle primary current limit, over voltage protection and current limit, over temperature protection, dead-time control, duty-cycle clamp and a power factor correction parameter.

The UCC2818ADRG4 can be used in many power factor correction applications, such as offline power conversion, dc-dc converters and ac-dc supplies. It offers high power factor correction and low switching losses, and can be used to control a wide range of input and output power levels.

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