Siemens recommends a 4-layer PCB with a dedicated ground plane and thermal vias to dissipate heat. A minimum of 2 oz copper thickness is recommended for the power traces. Additionally, a heat sink with a thermal resistance of 10°C/W or lower is recommended for high-power applications.
To ensure EMC, Siemens recommends using a shielded enclosure, keeping the BTS941 away from sensitive components, and using a common-mode choke or ferrite bead on the input lines. Additionally, a decoupling capacitor of 10nF or higher should be used between the input and output lines.
The maximum allowed voltage drop across the BTS941 is 1.5V. Exceeding this voltage drop may lead to reduced efficiency, increased heat generation, and potentially damage the device.
The BTS941 is rated for operation up to 125°C. However, derating is required for temperatures above 85°C. Siemens recommends reducing the output current by 1.5% per degree Celsius above 85°C to ensure reliable operation.
Siemens recommends checking the input voltage, output current, and PCB layout for any errors or defects. Ensure proper thermal management, and verify that the device is not operating outside its specified ratings. Consult the datasheet and application notes for more detailed troubleshooting guidelines.
