MCP19111 PMBus™ Protocol-Enabled POL Converter Reference Design
DS50002379A-page 24
2015 Microchip Technology Inc.
Steps 6-12 are used to calibrate the temperature coefficient.
Note that these steps
apply only when a different inductor and/or layout is used
.
6.
Write down the T0 value from the “ADC(T0)” field.
7.
Maintain the high-current output and allow the board to heat up (70-80°C is the
optimum).
8.
Press the high-current corresponding
Read
button and the
Calculate
button to
update the values. Remember the updated value of the second voltage.
9.
Compute the difference between the high-current voltage obtained in Step 8 and
the one written down (see Step 3).
10. Compute the difference between the T0 value updated on Step 8 and the one
written down (see Step 6).
11. Compute
as the voltage difference, divided by the last second voltage value,
divided again by the T0 difference (see example in
Equation C-5
)
(
Step 9:Step 8:Step 10). Multiply the
value by 16384; write the rounded to
next integer value of the result in the “ALPHA” field and press the corresponding
Send
button at the right.
12. Go to the Status menu, and in the Operation Panel, press the
StoreALL
button
to preserve the actual value after power-off.
