UCC3802D

The UCC3802D is a peak current-mode PWM controller with high accuracy current-sensing capability, a power-saving function for light load conditions, and a soft-start function. It is highly suitable for use in offline battery-charging and pre-charging power supplies. It allows you to set the threshold voltage and provides over-current, over-voltage and over-temperature protection.

In terms of application fields, the UCC3802D is particularly useful in several areas. Most notably, it is suitable for both AC-DC and DC-DC offline power chargers, such as offline mobile phone chargers, laptop chargers, tablet chargers and the like. In general, it is ideal for low power, high performance, and high reliability offline switcher applications.

The working principle of UCC3802D is based on peak current-mode control, where current sensing is crucial to achieve predictable, consistent, and safe operation. It also provides excellent transient performance, low output ripple voltage, current limit protection and accurate output voltage regulation. It operates in either continuous mode, or in a burst mode to extend battery life.

The UCC3802D provides several features that make it highly useful in offline switching applications such as mobile phone chargers, laptop chargers, and power supplies. It is capable of generating precise and consistent output voltage, while ensuring excellent transient response. The interface of UCC3802D makes it particularly suitable for use in highly integrated designs. It also boasts a low operating frequency which enables it to offer high efficiency and low EMI/RFI emission.

The UCC3802D also features a power-saving mode which reduces its power consumption under light load conditions. This mode automatically activates when the output load current is below a certain value. It also includes a soft-start feature which gradually increases the output voltage from zero in order to reduce the inrush current. Finally, it also provides over-current, over-voltage and over-temperature protection.

Overall, the UCC3802D is a highly reliable and feature-rich controller suitable for a wide range of offline switching applications. It is designed to provide precise, consistent and reliable operation with excellent transient response, low output ripple voltage, current limit protection, and accurate output voltage regulation. It is also capable of reducing power consumption under light load conditions and offers over-current, over-voltage and over-temperature protection.