Description:Wide Input Voltage Range: 4.5 V to 65 V; Switching Frequency: 100 kHz to 1 MHz; 0.6 V Reference Voltage with 0.67% Accuracy; Selectable CCM PWM Mode or PFM Mode for Light Loads; Over Current Protection, Thermal Shutdown, Over Voltage Protection, Under Voltage Protection and Short−circuit Protection; External Compensation for Wide Operation Range; Adjustable Soft−Start & Pre−Bias Startup; Enable Function with Adjustable Input Voltage Under−Voltage−Lock−Out (UVLO); Power Good Indicator; Dual LDOs for Single S
A good PCB layout is crucial for the FAN65004B. Ensure a solid ground plane, keep the input and output capacitors close to the IC, and use a Kelvin connection for the sense resistors. A 4-layer PCB with a dedicated power plane is recommended.
Select an inductor with a high saturation current rating, low DCR, and a suitable inductance value. The FAN65004B datasheet provides a formula to calculate the inductor value based on the input voltage, output voltage, and switching frequency.
The FAN65004B is rated for operation up to 125°C junction temperature. However, for reliable operation, it's recommended to keep the ambient temperature below 85°C to ensure a safe margin.
The FAN65004B requires a compensation network to ensure stability. Use the datasheet's guidelines to calculate the compensation components, and then fine-tune them using simulation tools or empirical methods to achieve optimal performance.
To minimize EMI, use a shielded inductor, keep the switching node (SW) away from sensitive nodes, and add EMI filters (e.g., common-mode chokes, capacitors) to the input and output lines. Ensure proper PCB layout and grounding to reduce radiation.
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FAN65004B Overview
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