The LT3798 can handle input voltages up to 100V, but it's recommended to keep it below 80V for optimal performance and reliability.
To minimize EMI, it's essential to follow a good layout practice, such as keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the loop area of the switching current path. Additionally, consider using a shielded inductor and placing it away from sensitive components.
The recommended operating temperature range for the LT3798 is -40°C to 125°C. However, the device can operate up to 150°C with derating. It's essential to ensure proper thermal management to prevent overheating and ensure reliable operation.
When selecting an inductor for the LT3798, consider the following factors: inductance value, saturation current, and DC resistance. A good starting point is to use an inductor with an inductance value between 1uH to 10uH, and a saturation current rating higher than the peak current of the converter. Additionally, choose an inductor with a low DC resistance to minimize losses.
The SS pin on the LT3798 is the soft-start pin. It's used to control the startup sequence of the converter, allowing the output voltage to ramp up slowly and preventing inrush currents. The SS pin can be connected to a capacitor to ground, and the value of the capacitor determines the soft-start time.
Findchips
Findchips