Description:Logic(VSS) and Power (COM) Ground ±5V Offset; Built-in Under-Voltage Lockout for Both Channels; Common-Mode dv/dt Noise-Cancelling Circuit; Matched Propagation Delay for Both Channels; Built-in Advanced Input Filter; Output In-Phase with Input; 3.3V and 5V Input Logic Compatible; Floating Channel for Bootstrap Operation to +600V ; Typically 4.5A/4.5A Sourcing/Sinking Current Driving Capability
A good PCB layout for the FAN7391MX involves keeping the high-frequency switching nodes (e.g., SW node) away from sensitive analog nodes, using a solid ground plane, and minimizing trace lengths and loops. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Also, ensure that the input and output capacitors are of high quality and have low ESR. Additionally, a minimum of 10uF ceramic capacitor is recommended at the VIN pin to filter out high-frequency noise.
The FAN7391MX is rated for operation from -40°C to 150°C (TJ) and -40°C to 125°C (TA) ambient temperature range. However, the device's performance and reliability may degrade at higher temperatures, so it's essential to ensure proper thermal management and heat sinking.
Yes, the FAN7391MX can be used in a synchronous rectification topology. However, it's essential to ensure that the synchronous rectifier MOSFET is properly selected and driven to minimize losses and ensure efficient operation.
The minimum input capacitance required for the FAN7391MX can be calculated using the formula: CIN ≥ (IOUT x ΔVIN) / (fSW x ΔVripple), where IOUT is the output current, ΔVIN is the input voltage ripple, fSW is the switching frequency, and ΔVripple is the desired output voltage ripple.
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FAN7391MX Overview
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