UCC3804N

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The UCC3804N series of integrated circuits are part of Texas Instruments\' family of off-line switchers, specifically AC-DC converters, for use in portable applications. These converters have been used in mobile phone chargers, laptop chargers and other similar devices. The UCC3804N\'s notable features include a wide input voltage range of 8.0V to 36V, a peak current mode constant frequency control, a wide operating temperature range, and an integrated low dropout (LDO) regulator.

The UCC3804N is considered an offline switcher, meaning it does not require an external component to regulate switching. Instead, it relies on its built-in control loop to accurately and efficiently switch the power output of the device. The series features a peak current mode control, which is a design method that uses a peak current detector to control the switch\'s duty cycle. The advantage of peak current mode control is that it allows the converter to respond quickly to changing loads, while still providing reliable and constant operating frequencies.

The wide input voltage range of the UCC3804N allows it to be used in a variety of applications, including those with varying line voltages. This gives designers more flexibility when selecting a suitable device for their application. Additionally, the integrated low dropout regulator provides more efficient operation and low standby power consumption.

In addition to its operation as an AC-DC converter, the UCC3804N series can be used as an offline flyback regulator. In this configuration, it uses its built-in control loop to regulate the output voltage of the device. It provides a reliable operating frequency, low ripple, and a wide input voltage range.

The UCC3804N series are rated for an operating temperature range of -40°C to +85°C. This allows it to be used in harsh environments without sacrificing performance. Additionally, it features an undershoot clamping circuit, which helps protect against capacitor derating.

The UCC3804N series offers a wide range of features and benefits, including a wide input voltage range, a peak current mode control, a wide operating temperature range, and an integrated low dropout regulator. This makes it a suitable choice for powering portable devices such as mobile phone chargers and laptop chargers.

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