https://e2e.ti.com/support/legacy_forums/automotive/Products covered in this section are TI's Q1 certified products Learn more at www.ti.com/automotive .en-USTelligent Community 13https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/572577/regarding-application-of-tps65381/2101130Wed, 08 Feb 2017 02:07:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:27e98460-7c14-4dc0-9edd-8ea8df449d4dScott MonroeHello Alan, My answers below will be referencing Rev F of the TPS65381-Q1 datasheet: http://www.ti.com/lit/gpn/tps65381-q1 Additionally, there are other resources such as the design checklist and other application notes at: http://www.ti.com/product/TPS65381-Q1/technicaldocuments Q1: How to use NRES ? Can it be connected directly to MCU? Is there pull-up resistor needed? A1: NRES is the reset output from the TPS65381. It is open drain with integrated pull up. The internal pull up is datasheet parameter 9.2, R NRES_ENDRV_PULLUP. Whether an external one is needed depends on any other loading you may have in your system on the reset line. Q2: As we understand, DIAG_OUT is output of diagnostic signals selected by SPI, is it right? If choosing analog signal as output, how to select low-pass resistor and capacitor, what frequency need to filter out? A2: Any filtering requirements will be dependent on the MCU ADC. The MCU ADC should specify any filtering needed. The input resistance, and any filter resistance and capacitance will impact the settling time and the voltage level (resistor divider with between the TPS65381 output resistance and any filter or input resistance). The datasheet suggest the order to switch through the analog signals to minimize the settling time in section 5.4.1.9 Analog MUX (AMUX) Q3: Is RSTEXT used to set delay time of NRES by adjusting resistance? How to select the resistor? A3: Yes, RSTEXT is the pin by changing a resistance will adjust how long NRES is held low after an event that causes reset (or RESET state in TPS65381), reset extension time. Datasheet spec line 9.4, t RSTEXT(22k Ω ) and spec line 9.4a, t RSTEXT(0k Ω ), give you two specified points for the reset extension time. This is described in section: 5.3.8 Reset Extension and shown in Figure 5-1. Power-Up and Power-Down Behavior . Q4: If we decide not to use CAN wake up function, how to configure CANWU pin (floating or pull down)? A4: CANWU pin is an input pin. One of two wake up pins, the other wake up pin is IGN. One of the two wake up pins need to be used to wake up the device. If one or the other wake up pins are not used they may be floated (there is an internal pull down) or an additional external pull down can be added. Q5: If we choose 5V as sensor supply voltage, should VSIN be connected to VDD6? Should VTRACK be connected to VDD5? How to choose the resistor for VSOUT1 when we want unity gain feedback? A5: With 5V sensor supply, VDD6 is likely the best choice since it will be more efficient to use the VDD6 pre-regulated supply into VSIN. For use of VSOUT1 configurations please see the application section of the datasheet where these are all documented. First you should decide if you want to track VDD5 or just have a 5V supply. I think the best application section to look at is: 6.2.2.3 VSOUT1 Tracking Linear Regulator, Configured to Track VDD5 Q6: If we want VDD1 to be 1.2V, how to choose resistor for VDD1_SENCE ? How to calculate it? A6: Please see application section: 6.2.2.2 VDD1 Linear Controller for how to calculate resistors for VDD1 and use VDD1. Best Regards, ScottTPS65381-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2100817Tue, 07 Feb 2017 21:03:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f92360b8-931b-47c6-b989-f255e480e905Akeem WhiteheadHi Yaita, Also, ensure that the HEX jumper pins on the TI GER board are not shunt-shorted. Should appear as follows:PGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/572577/regarding-application-of-tps65381Tue, 07 Feb 2017 07:24:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7110fae8-1ac8-49e6-af0b-f4581562fb7ealan zhuOther Parts Discussed in Thread: TPS65381-Q1 Dear, Regarding application of TPS65381, I have several questions and hope to get support from your side: How to use NRES ? Can it be connected directly to MCU? Is there pull-up resistor needed? As we understand, DIAG_OUT is output of diagnostic signals selected by SPI, is it right? If choosing analog signal as output, how to select low-pass resistor and capacitor, what frequency need to filter out? Is RSTEXT used to set delay time of NRES by adjusting resistance? How to select the resistor? If we decide not to use CAN wake up function, how to configure CANWU pin (floating or pull down)? If we choose 5V as sensor supply voltage, should VSIN be connected to VDD6? Should VTRACK be connected to VDD5? How to choose the resistor for VSOUT1 when we want unity gain feedback? If we want VDD1 to be 1.2V, how to choose resistor for VDD1_SENCE ? How to calculate it?https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2099937Tue, 07 Feb 2017 05:55:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:43af7d89-11ce-4a41-b8ea-cabee1dfb378K.YaitaHi Akeem-san, I apologize for having overlooked. I will try your procedure. Best Regards, YaitaPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2099928Tue, 07 Feb 2017 05:37:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5ae1bdde-1e2a-42e8-abfd-320b222f8294Akeem WhiteheadHi Yaita, I attached the zip file containing the .EXE and .HEX to the bottom of my last message. I also attached PGA450Q1GUI version 1.4 in the bottom of the last message. Are you able to download both zip files?PGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2099914Tue, 07 Feb 2017 05:22:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2e304047-33c2-414d-a315-98e7536d59b8K.YaitaHi Akeem-san, Thank you for your support. >1. Open HIDBootLoader.exe. Where can I get the HIDBootLoader.exe and *.HEX file? Best Regards, YaitaPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2099821Tue, 07 Feb 2017 03:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b8b89205-e8ae-4601-a9c9-d0b99f26a713Akeem WhiteheadHi Yaita, Please try the following TI GER board reprogramming procedure: The procedure for reprogramming firmware preloaded in the TI GER over USB allows updated firmware (*.HEX file) to be loaded into the microprocessor by executing the following procedure: 1. Open HIDBootLoader.exe. 2. With the TI GER connected to the USB bus, place a jumper in the “HEX” jumper location on the TI GER. The green LED will illuminate. 3. Depress the RESET pushbutton. Now the boot loader mode is activated. 4. In the HIDBootLoader program, verify that “Device attached” appears in status the window. 5. Click the “Open Hex File” button, and navigate to the location of the *.HEX file to be uploaded. 6. Once the file is selected, click on “Program/Verify” 7. Wait for programming conformation, then remove the HEX jumper and press RESET button. Let me know if this procedure eliminates the GUI-freezing error. I am also attaching an older version of the GUI to determine if the error is due to a GUI update. e2e.ti.com/.../Tiger-Firmware-update-kit.zip e2e.ti.com/.../PGA450-GUI-1.40.0.zipPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2097309Fri, 03 Feb 2017 12:57:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6c5ffab4-c33f-4557-9fc2-3268ae71cee9Krishnamurthy HegdeHi Jeho, Thanks. I have already replied to that email and we will close this thread. Regards, MurthyTPS65311-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2097277Fri, 03 Feb 2017 12:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:285ea02d-1483-4ff2-a2f5-428f6da04a75Jeho ShinHi Murthy Thank you for your great interest. I sent some waveforms to your email address. I would appreciate your review and advice. Regards, JehoTPS65311-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2095771Thu, 02 Feb 2017 04:20:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:97aba26f-de10-4545-bb7f-c1afdb86bf0cK.YaitaHi Scott-san, I appreciate for your help. I suspect it as the cause of defect of TI-GER board.. I also attempt to get another EVM in parallel. Best Regards, YaitaPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2095189Wed, 01 Feb 2017 18:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:59de0789-4df7-421a-b3df-f417dfeead4dScott MonroeHi Yaita-san, I have assigned the appropriate engineer who should be responding to your question. Thanks & Best Regards, ScottPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2095055Wed, 01 Feb 2017 15:59:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e98bde22-2165-4b0e-b035-4f0394d85c64K.YaitaHi Joseph-san, Thank you for moving to the Automotive Forum. TI Automotive team, Could you please give me comments about the issue? Best Regards, YaitaPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2094924Wed, 01 Feb 2017 11:44:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:adc38e6e-98eb-4ecc-9b53-c163862bd101Krishnamurthy HegdeHi Jeho, Were you able to solve this overshoot issue during the start up? What was the root cause of this problem? Regards, MurthyTPS65311-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-opening/2093684Tue, 31 Jan 2017 10:28:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:773cf0e8-b886-4b58-bdfa-85ea50192ec3Joseph WuYaita-san, I've moved this post to the Automotive Forum, where questions about the PGA450-Q1 have previously been posted. I'm sure that you'll find an answer here. Joseph WuPGA450Q1EVMPGA450-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/570937/pga450q1evm-gui-was-frozen-when-openingTue, 31 Jan 2017 02:59:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e10b5e8d-9fc3-4ae8-8b88-e155259d241dK.YaitaPart Number: PGA450Q1EVM Other Parts Discussed in Thread: PGA450-Q1 Hi Team, My customer got PGA450Q1EVM and I heard GUI was frozen when opening GUI. I attached the picture after GUI was frozen. His startup procedure is no ploblem according to the following E2E thread. https://e2e.ti.com/support/applications/automotive/f/26/p/569058/2088597#2088597 1. Connect TI-GER board to EVM. 2. Connect and power EVM. 3. Connect USB from TI-GER to PC. 4. Open GUI. He also tried the following startup procedure to isolate the TI-GER board, however same freeze error can be replicated.. 1. Only connect the TI-GER board to the PC (EVM should not be connected or powered) 2. Open the GUI. Does the GUI still freeze? What is concern? Best Regards, Yaita / Japan distyPGA450Q1EVMhttps://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2092515Mon, 30 Jan 2017 11:28:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6fa2b86d-be1f-4da4-ae2a-662a2a9daeb3Krishnamurthy HegdeHi Jeho, Thanks for the details. It is difficult to debug remotely. However i can ask you to check the below. But not sure whether this works for you. 1. change BUCK2/3 output capacitors to 22uF. change Buck-1 output capacitor to 47uF and re check the compensation calculations for BUCK1. 2. Send me the exact schematics (complete PMIC page) in PDF format with all the changes you have made so far. Schematic you have sent is not complete. you can send it to my email ID (kmurthy.hegde@ti.com) and we keep it confidential. 3. fix the bottom sense resistor= 1.6k ohm and recalculate the top side sense resistors for BUCK2/3. 4. what have you done with COMP2/3? 5.short Vin and VINPROT (for testing purposes only). Also check with 12Vin 6. check PH/SW node of BUCK1/2 (zoom in to see few clock cycles clears during overshoot) during start up and send some pictures to me showing VINPROT, VBUCK1, VPH1, VPH2. 7. Add 500mA load (fixed resistor is ok) on each regulators and check the behavior. 8. check sense pins to see whether there is some noise coupling happening. If you have current probe, check the BUCK1 inrush current during start up. 9. if you have another board, modify the board according to the design checklist and try on another board. TPS65310A design checklist is also applicable to this device. www.ti.com/.../slva609.pdf Regards, MurthyTPS65311-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2092123Sat, 28 Jan 2017 11:05:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0cde11ce-d38d-4846-8446-c8ebd8573297Jeho ShinHi Murthy I always appreciate your answers. I am a robot engineer, and we are developing our safety related controllers for certification. I am very worried that my Project is too delayed because of this PMIC. I know that designing the power section is not easy. However, recent buck type regulators can get excellent voltage by adding fewer parts to the external. Anyway, loads of the PMIC are only Safety CPU and Ethernet Controller In my system.. You can see that the output of each BUCK is slightly higher until VINPORT rises completely. But the EV board is different. I hope to get God's hand from you as soon as possible. Regards, JehoTPS65311-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2090536Thu, 26 Jan 2017 19:22:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:56609096-7882-4b6d-99cf-3c5be1e25913Krishnamurthy HegdeHi Jeho, Could you please provide the customer name and project details? I asked few times, but i didn't get the answer yet. Regards, MurthyTPS65311-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568562/tps43336-q1-external-clock-frequency/2090356Thu, 26 Jan 2017 15:34:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:8fd9282d-a2bc-47d3-955c-c1ebd59e6c6btsuyoshi tokumotoFrank_san, I apologize for the delay in my response. Thank you very much for your prompt reply and detailed explanations. I am always helped by your advice! Best regards. Tsuyoshi TokumotoTPS43336-Q1https://e2e.ti.com/support/legacy_forums/automotive/f/automotive-forum-read-only/568253/tps65311-q1-tps65311-q1-not-working-external-fet/2090111Thu, 26 Jan 2017 05:53:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d61a3c8f-4abb-435c-97a6-7217ceeaae8cJeho ShinHI, Murthy Thank you for your continued support. As I modified it according to your recommendation, the required voltages are coming out normally. However, the problem that the initial voltage of BUCK1, BUCK2, BUCK3 is slightly higher is not solved. I attach the investigation (waveform) related to the problem below. We added 94uF to the outputs of each BUCK1, BUCK2, and BUCK3. The waveform without FB8 beed is the same. EVB : Evaluation board. Regards, JehoTPS65311-Q1