The UCC3805DTR is a high-frequency device, and proper layout and placement are crucial to minimize EMI. TI recommends placing the device close to the power source, using a solid ground plane, and keeping the input and output traces short and separate. Additionally, using a shielded inductor and placing the device on a multi-layer PCB can help reduce EMI.
The UCC3805DTR's voltage regulator output can be compensated using a type-II compensation network. This involves adding a resistor and capacitor in series between the COMP pin and the output voltage, and a capacitor between the COMP pin and ground. The values of these components depend on the specific application and output voltage.
The UCC3805DTR can handle input voltages up to 18V, but it's recommended to keep the input voltage below 15V to ensure reliable operation and to prevent damage to the device.
To ensure the UCC3805DTR's thermal performance, it's essential to provide adequate heat sinking, such as a thermal pad or a heat sink attached to the device. Additionally, keeping the device away from other heat sources, using a thermally conductive PCB material, and ensuring good airflow around the device can help prevent overheating.
Yes, the UCC3805DTR can be used in a synchronous rectification topology. In this configuration, the device's internal FETs are used as synchronous rectifiers, which can improve efficiency and reduce power losses. However, this requires careful design and layout to ensure proper operation and to prevent shoot-through currents.
UCC3805DTR datasheet
by Texas Instruments
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