Description:Extended Allowable Negative VS Swing to -9.8V forSignal Propagation at VDD= VBS =15V ; Built-in Common Mode dv/dt Noise Canceling Circuit; Floating Channel for Bootstrap Operation to +600V ; V DD & VBS Supply Range from 10V to 20V; 3.3V and 5V Input Logic Compatible ; Typically 350mA/650mA Sourcing/Sinking Current Driving Capability ; Built-in UVLO Functions for Both Channels; High-Side Output In-Phase of Input Signal
A good PCB layout for the FAN7385MX involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the high-current paths. It's also recommended to use a shielded inductor and to keep the switching node (SW) away from sensitive analog circuits.
The inductor value depends on the input voltage, output voltage, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet. Additionally, consider the inductor's saturation current, DC resistance, and core material when selecting an inductor.
The FAN7385MX is rated for operation from -40°C to 125°C ambient temperature. However, the junction temperature (TJ) should not exceed 150°C. Ensure proper thermal design and heat sinking to maintain a safe operating temperature.
Yes, the FAN7385MX can be used in a synchronous rectification configuration. This can improve efficiency by reducing the voltage drop across the rectifier. However, ensure that the synchronous rectifier is properly sized and driven to avoid shoot-through currents and other issues.
Start by checking the input voltage, output voltage, and current. Verify that the IC is properly powered and that the enable pin is high. Check for proper PCB layout, decoupling, and thermal design. Use an oscilloscope to inspect the switching node and output voltage waveforms for signs of instability or oscillation.
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