Post-Assembly

• Check all required components are assembled and DNP components are not assembled
• Verify components oriented correctly (polarity, pin 1 designators, etc.)
• Verify there are no bridges between parts/pins creating unwanted shorts
• Verify general soldering quality - no stray solder, burns, etc., all pins and pads connected with enough solder

Unpowered Tests

• Verify power rails are not shorted to GND or with each other
• Verify EN/RST/SHDN pins are not shorted to either GND or a power rail, unless it is supposed to be
• Verify communication protocol lines (i.e. SDA & SCL for I2C, MISO MOSI SCLK & CS for SPI, etc.) are not shorted with each other, with a power rail, or GND

If any shorts are found, do not connect the board to a power supply. Locate and attempt to fix the cause of any shorts before continuing.

Basic Powered Tests

General Tests:

• Power on board + touch test, verify components and the board itself does not get too hot
• Probe power rails, verify correct voltage
• Verify all ICs, components, LEDs, etc. are powered on successfully. Communicate with all peripherals
• Program microcontroller

48V-5V buck converter & 48V-17V buck converter:

• Enable conditions function as expected
• Verify output current limit
• Verify output voltage limit

5V smart high-side switches:

• Verify enable condition
• Verify output current limit

17V high-side switch:

• Verify enable condition

Changes for Next Rev

• R44 and R45 ar 0603 and should be 0805