A 2-layer or 4-layer PCB with a solid ground plane and thermal vias is recommended. Ensure a minimum of 1 oz copper thickness and a thermal relief pattern under the device.
Use a capacitor with an ESR ≤ 1 Ω and ensure the capacitor is placed close to the device. Add a 1-2 nF ceramic capacitor in parallel to filter high-frequency noise.
The maximum allowed voltage on the EN pin is 6 V. Exceeding this voltage may damage the device.
The BD439G is rated for operation up to 125°C. However, ensure proper thermal design and consider derating the output current at high temperatures to prevent overheating.
The output voltage ripple can be estimated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor.
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BD439G Overview
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