UCC3810DW

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The UCC3810DW is a programmable off-line switcher controller designed to provide maximum design flexibility in universal off-line applications. This single-chip switcher controller operates with operating voltages up to 500V and provides instantaneous short circuit protection.

The UCC3810DW is ideal for a wide range of off-line applications because of its adjustable start-up times, adjustable switching times, adjustable peak current limits, and adjustable voltage limits. The UCC3810DW can be used in low-power flyback, forward converter, and switching regulator designs.

The UCC3810DW includes a wide array of protection features, including low voltage protection, adjustable overvoltage protection and overload protection. Additionally, the device includes self-protection when the device is subjected to destructive disturbances. The device also provides instantaneous current limiting to protect against output current overloads.

Application Field of UCC3810DW

The UCC3810DW is designed to be used in a variety of off-line applications. Some of the more popular applications are in flyback converters, forward converters, buck converters, flyback-forward converters, and secondary-side regulation. The UCC3810DW can be used to provide primary-side control in application such as switched-mode power supplies, DC-DC converters, and switched-mode amplifiers. Additionally, the device can be used as a secondary-side controller to provide dynamic load current sharing and synchronous rectification.

The UCC3810DW can be used in low-power applications such as mobile phone chargers, tablet chargers, and portable electronic devices, as well as high-power applications such as server power supplies, home appliance power supplies, and automotive power supplies.

Working Principle of UCC3810DW

The UCC3810DW operates in a two-step process. In the first step, the device monitors the input voltage and senses when the voltage has exceeded the start-up threshold. When the threshold is exceeded, the device initiates the start-up sequence and sends a signal to the power switch to start switching. In the second step, the device monitors the output voltage, adjusts the switch on-time to maintain a constant output voltage, and enables overvoltage protection.

The UCC3810DW includes an oscillator to regulate the switching frequency, which is adjustable using an external resistor. Additionally, the device includes a full wave rectifier to sense the input voltage and detect when the start-up threshold has been exceeded. The UCC3810DW also includes several protection features, such as overvoltage protection and adjustable current limiting.

The device is designed to be used in a variety of off-line applications, including flyback and forward converters, buck converters, flyback-forward converters, and secondary-side regulation. With its adjustable parameters and protection features, the UCC3810DW provides maximum design flexibility.

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