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Variable Transformer Tuning Procedure
February 2013
Tuning Procedure for PGA450Q1EVM
Mixed Signal Automotive
Test Procedure for the TI-GER Boards
1. Attach TIGER Board to PGA450Q1EVM as shown in Figure 2
Figure 1: How to connect TIGER to PGA450EVM
2. Apply +12 volts to VPWR-IN and GND banana plugs as shown in Figure 1 (red and black cables)
3. Plug the TIGER board into computer via USB cable.
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Related Manuals for Texas Instruments PGA450Q1EVM
Summary of Contents for Texas Instruments PGA450Q1EVM
- Page 1 Mixed Signal Automotive Test Procedure for the TI-GER Boards 1. Attach TIGER Board to PGA450Q1EVM as shown in Figure 2 Figure 1: How to connect TIGER to PGA450EVM 2. Apply +12 volts to VPWR-IN and GND banana plugs as shown in Figure 1 (red and black cables)
- Page 2 Set trigger to channel 1, Normal mode, at 500mV d. Move horizontal position to near the left edge of the o-scope display. e. Move Channel 1 down to near the bottom of the o-scope display. 6. Open the “PGA450_Customer_GUI 1.38.3.exe”. PGA450Q1EVM Transformer Tuning Procedure – Feb., 2013...
- Page 3 8. In the OTP tab, click on the “Check OTP Status” button (Make sure it says “PROGRAMMED to jump to DEVRAM” or “EMPTY”). If it says just “PROGRAMMED”, replace the PGA450 unit on the EVM with a new one. PGA450Q1EVM Transformer Tuning Procedure – Nov., 2012...
- Page 4 9. If the OTP status was EMPTY, then you need to have the “Program OTP Memory Also” box checked in the “DEVRAM” tab, and supply 8V on VPROG OTP pin by installing the VPROG_OTP jumper, and connecting the (8V) and VP_OTP pins. Figure 1: PGA450 GUI PGA450Q1EVM Transformer Tuning Procedure – Feb., 2013...
- Page 5 11. Disconnect the (8V) and VP_OTP pins if they were connected. 12. On the Evaluation tab, click on the “Amplifier Output (unfiltered)” button. There should be a green dot in the upper left corner of the button indicating that it is selected. PGA450Q1EVM Transformer Tuning Procedure – Nov., 2012...
- Page 6 14. In the LIN tab, receive a LIN transmission by clicking “RECEIVE” with PID = 21 and Number of bytes to be received = 2. As shown below, 0x(1234) should be received. This verifies that the firmware is loaded properly and that the GUI is communicating through LIN with the PGA450. PGA450Q1EVM Transformer Tuning Procedure – Feb., 2013...
- Page 7 16. The oscilloscope should display a waveform that looks similar to the figure below. The decay time is shown by the red arrow. Adjust the oscilloscope settings so that the full signal can be seen. PGA450Q1EVM Transformer Tuning Procedure – Nov., 2012...
- Page 8 17. Use a small screwdriver to slowly turn the transformer until the burst signal on the oscilloscope decays as quickly as possible. Keep clicking on the “TRANSMIT” button to update the signal on the oscilloscope. 18. Below is an example of the minimum decay time for one board. PGA450Q1EVM Transformer Tuning Procedure – Feb., 2013...
- Page 9 At the “TESTO_A” test point, an example waveform like the one below will be shown. For a good tuned board, there should be no spikes in region B, and the object should be clearly visible. PGA450Q1EVM Transformer Tuning Procedure – Nov., 2012...
- Page 10 Overwrite this text with the Lit. Number Object Decay Time 21. Turn off the power supply and remove the oscilloscope probe. The PGA450EVM’s transformer is now tuned. PGA450Q1EVM Transformer Tuning Procedure – Feb., 2013...
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