The recommended PCB layout and thermal management for the PKE3211PI can be found in the application note AN-1155 from Flex Ltd. It provides guidelines for PCB design, thermal pad connection, and heat sink attachment to ensure optimal performance and reliability.
The PKE3211PI has a programmable input voltage range. To configure the device for different input voltage ranges, refer to the device's programming guide, which provides details on setting the input voltage range using the I2C interface and the corresponding register settings.
The maximum allowed voltage on the EN pin is 6V. To ensure proper voltage sequencing, the EN pin should be driven high after the input voltage (VIN) has reached its minimum specified value. A minimum delay of 10ms is recommended between the time VIN reaches its minimum value and the EN pin is driven high.
The output voltage ripple of the PKE3211PI can be calculated using the formula provided in the datasheet. To ensure the output voltage ripple meets your application's requirements, consider the output capacitor value, ESR, and the switching frequency of the device. You may need to add additional output capacitors or adjust the switching frequency to meet your specific requirements.
The thermal shutdown temperature is 150°C, and the hysteresis temperature is 30°C. When the device's junction temperature exceeds the thermal shutdown temperature, it will shut down to prevent damage. Once the temperature drops below the hysteresis temperature, the device will resume normal operation. These temperatures are built-in and cannot be adjusted.
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