Texas Instruments TPL0401EVM, User Manual

Page: 5 / 15

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OUT
C6
R12
TPL0401B
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Software Setup
5.1 Voltage Reference Mode
Make sure the EVM is set up in voltage reference mode as described in Section 3 . With the GUI open and
TPL0401A selected you are also given the option to change the voltage divider ratio of the TPL0401A as
a percent value. To do this simply click the box that says percent and you will be prompted to input a
percent value between 0 and 100; decimal values can be used. After pressing enter, the GUI will find and
send the tap value that is closest to the chosen percent value.
Using any of the methods to change the tap value of the TPL0401A will update the output voltage at TP1.
The output will be a percent of the supply voltage, 3.6V.
5.2 Variable Gain Mode
The 430Boost-TPL0401EVM allows for a variable gain setup to evaluate the bandwidth of the TPL0401.
After following the setup instructions in section 2.3.2 ?, the circuit will look as follows:
Figure 2. TPL0401B Variable Gain
The capacitor C6 and the resistor R12 are unpopulated and should be set by the user. R12 will set the
possible gain values and C6 will keep the loop stable. Changing the value of the TPL0401B works the
same as described in the beginning of section 3.1.
5 SLIU008 – September 2011 TPL0401EVM
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