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Regarding application of TPS65381

alan zhu — Tue, 07 Feb 2017 07:24:04 GMT

Other 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?

PGA450Q1EVM: GUI was frozen when opening

K.Yaita — Tue, 31 Jan 2017 02:59:35 GMT

Part 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 disty

TPS65311-Q1: TPS65311-Q1 Power Resources Sequencing using IC SPI Interface

Julio Apps — Thu, 19 Jan 2017 23:35:45 GMT

Part Number: TPS65311-Q1

I see that the device has registers to enable BUCK2,BUCK3,BOOST and the LDO. I am wondering if it’s feasible to keep the previously mentioned rails disabled when VBAT is applied to the single output buck controller and than enable the other rails one by one through the SPI interface?

Thank you,

Julio Sanchez

TI-GER Schematic

Chris Seto — Thu, 19 Jan 2017 19:48:34 GMT

Fairly straight forward question: Is there a schematic available for the TI-GER board? I've searched and cannot find it.

Chris

TPS43336-Q1: External clock frequency

tsuyoshi tokumoto — Thu, 19 Jan 2017 11:13:11 GMT

Part Number: TPS43336-Q1

Hi team,

Please let me ask you a question about TPS43336Q1.

When an external clock outside specification frequency range is input to the SYNC pin,
how does the TPS43336Q work?

   For example, the external clock frequency of 400 kHz is input to the Sync pin usually.
   If the external clock frequency change to 40kHz or4MHz,
   how will the TPS43336Q work?

Best regards.
Tsuyoshi Tokumoto

TPS65311-Q1: TPS65311-Q1 Not working external FET

Jeho Shin — Wed, 18 Jan 2017 09:15:23 GMT

Part Number: TPS65311-Q1

It is configured as below, and when power is applied at the first, the gate voltage is not lowered and the FET does not operate.

That is VIN and GPFET are rising as the same voltage.

In such a case, what causes it?

PGA450-Q1: PGA450 datasheet interpretation

Chris Seto — Tue, 17 Jan 2017 19:10:56 GMT

Part Number: PGA450-Q1
Other Parts Discussed in Thread: PGA450Q1EVM

Support Path: /Product/Development and troubleshooting/

I'm having an issue with the PGA450 involving SPI communication.

My test setup:

SPI master: STM32F2

SPI phase: 2 edge

SPI polarity: 0

SPI wordsize: 8bit

The PGA450 eval board is connected the STM3 through a level shifter, to go from 3V3 TTL to 5V logic for the PGA450.

I'm trying to program registers within the ESFR. The first thing I do after PGA450 powerup is send a 0x16 0x2F 0x01 to put the onboard mcu into reset to allow for ESFR access. After another transfer, I get the following response to this command: 0x02 0x00 0x00. this would indicate that the command was successful.

Next, I try to read the current value of ESFR address 0xc0, as per the datasheet example. I send: 0x19 0xc0 0x00. Again, after another transfer, the response to this command is 0xc2 0x00 0x00. This would indicate a parity error.

What's going on here? As per datasheet example (Table 17) this is a valid command. Any ideas?

Chris

PGA411-Q1: Problem reading angles and velocities from a 3-pole resolver

Anthony Robertson54 — Tue, 17 Jan 2017 17:03:10 GMT

Part Number: PGA411-Q1

Hi!

I am trying to interface a PGA411-Q1 to a 3-pole resolver via the PGA411-Q1 EVM development board.

The problem is, that whatever values I set in the DEV_CONFIG1 / NPLE register, I always read a velocity that is three times too high, and when I move the resolver through 360°, I get three cycles of 0-359°, instead of just one.

Why is the PGA411 seemingly ignoring the NPLE register?

Best Regards

Anthony Robertson.

TLV3702-Q1: operation at below minimum voltage

K.Hamamoto — Mon, 16 Jan 2017 00:51:05 GMT

Part Number: TLV3702-Q1

I would like to know how the device behaves when the input voltage is below 2.7V. (This is minimum voltage at single supply)

Does this device output low level ? or high level ? or unknown?

Our customer is concerned how this device operates when it startup. Because some other device outputs the glitch during startup until it reaches minimum voltage.

Regards,

Koji Hamamoto

TPS92630-Q1: TPS92630-Q1 Thermal Foldback programming

Masatoshi Oguri — Fri, 13 Jan 2017 05:46:00 GMT

Part Number: TPS92630-Q1

Hello,

I cannot understand what the below line at the bottom of p.19 of the datasheet means. What does this mean?

"With TEMP floating, the definition of thermal monitor activation temperature, T(th), is the temperature at which the current reduction begins."

What if without floating? I guess the definition is still the same.

I would also like to know if TEMP can be left floating.

Thanks.

Oguri (TIJ automotive FAE)

PGA450Q1EVM-S: Encounter problems in the test

alan zhu — Thu, 12 Jan 2017 05:24:39 GMT

Part Number: PGA450Q1EVM-S

Dear

Encounter problems in the test:

1、 The blind area is too wide , it is near 30cm.In the short distance test, the "00 55 11 01 00" serial communication command is used to obtain the data of close range measurement.It is constantly output " FF FF 00"at the module of a distant range 30cm in blind area;

2、 it is near 80cm.In the short distance test, the "00 55 11 01 00" output " FF FF 00"

3、 How to accurately identify the commands when to send in a far or close distance.When the module is used for the distance of 1m-5m, it sends remote distance instruction: "00 55 11 02 00", and the use of close range command within 1m: "00 55 11 01 00".However, how to identify the type of instruction should be sent at the moment in practical applications.

4、 There is whether the return data format to explain. For example, analytical description:send"00 55 61 02 00"to"09 FF 20 84 40 74 60 54 80 4C A0 3C E0 34 19 1E "?

ULQ2003A-Q1: ULQ2003A-Q1 Available concept as a LED Driver for dimming

Nam, Dino — Thu, 12 Jan 2017 02:36:35 GMT

Part Number: ULQ2003A-Q1

Dear team,

Please review the below concept and let me know whether below concept is available or not.
- Ignore resister value

If below concept is not available, please let me know about way of dimming using ULQ2003A-Q1.

Thank you.

TPS7B7702-Q1: Concept of Absolute Max's Tj&TA, TSD in TPS7B7702

Pokkun — Tue, 10 Jan 2017 10:23:13 GMT

Part Number: TPS7B7702-Q1
Other Parts Discussed in Thread: TPS7B7702

Hello.

I'm trying to sale of TPS7B7702, now.

And I have a question about this product.

(I'm asked by this customer for this thing.)

So, please teach me about this thing.

＜Question＞

Junction temperature (Tj) of absolute maximum rating: - 40 to 150 ° C and ambient temperature (TA): - 40 to 125 ° C.

However, Thermal shutdown detection temperature of this product is 175 ° C @ TYP (Junction).

In such a condition, I think that the detection temperature of Thermal shutdown is 150 ° C @ TYP and it is necessary to have hysteresis of about 15 ° C.

(This is because there is concern that "If the ambient temperature has reached near the rated rating, it is not reset if the IC is detected at 175 ° C.")

Is my consider a mistake?

Could you help us?

Best Regards,

Masumi Sekiguchi

PGA411Q1EVM: PGA411 A,B,Z output signal abnormal

John zhang — Mon, 09 Jan 2017 09:49:55 GMT

Part Number: PGA411Q1EVM

PGA411 GUI parameter set as below picture 1, excitation output signal is normal,resolver input signal is normal.PGA411 A,B,Z output signal abnormal when customer adjust R1x (SCH reference picture 2)achieve sin,cos gain range from 1.0V to 2.1V. PGA411 A,B,Z have continue signal output when resolver angle not change

Picture 1

Picture 2

TPS65917-Q1: The orderable P/N of TPS65917-Q1

Eason Lu68 — Mon, 26 Dec 2016 11:05:44 GMT

Part Number: TPS65917-Q1
Other Parts Discussed in Thread: TDA2E, DRA726

i found that TPS64917-Q1 P/N in TDA2E EVM is PO917A13DTRGZRQ1, i know that P means protype, but what does the 13D mean? I searched the datasheet, and the datasheet show below four version for TPS65917-Q1, they are O917A130TRGZRQ1, O917A131TRGZRQ1, O917A132TRGZRQ1, O917A133TRGZRQ1, could you guys please help to check which orderable P/N is corresponding to PO917A13DTRGZRQ1, appreciate your help in advance.

TPS61165-Q1: TPS61165-Q1 with SON package

Go — Wed, 21 Dec 2016 09:53:39 GMT

Part Number: TPS61165-Q1
Other Parts Discussed in Thread: TPS61165,

Hi,

TPS61165 has two types of package , SOT23 and WSON.

but regarding TPS61165-Q1, only SOT23 package is available now.

Do you have any plan for TPS61165-Q1 with WSON package?

Thanks

TPS65381-Q1: When use TPS65381-Q1 with TMS570,how to disable the Watchdog Fail Counter in ACTIVE STATE？

Hello Kitty — Wed, 21 Dec 2016 03:10:49 GMT

Part Number: TPS65381-Q1
Other Parts Discussed in Thread: TMS570LS1115

Hello

One problem maybe need your help,thanks a lot.

Environment: CCS6.2

Software: Bootloader and Application program

Hardware:TMS570LS1115,TPS65381-Q1

Description:

Because the bootloader have not integrate the instruction to reset the WDT(Integrated the Reset instruction is very hard because of other reasons ),then run in the bootloader,because of the WDT Fail Counter reachs to 7，so the TPS65381-Q1 will enter the SAFE STATE and cause the TMS570 reset.

If we disable the Watchdog Reset function,TMS570 will not be reset in SAFE,but we have to take several hundreds milliseconds to decrease the Watchdog Fail Counter. Now we want to shorten the time of the process.

Pls help the case,do you have the way disable the Watchdog Fail Counter?If not,do you have other suggestion to solve the problem?

Thanks for help.

ESD Diode with ISO 10605

suresh kumar56 — Tue, 20 Dec 2016 10:37:35 GMT

Hi ,

I am looking for the ESD Diode with ISO 10605 HBM 330pF/2K ohms and Discharge Voltage >= +/- 15KV for both Contact and Air

Thanks,

Suresh Kumar G

Hardware Engineer

TPS65311-Q1: Closed window time

Kuramochi Tadahiko — Tue, 20 Dec 2016 09:14:35 GMT

Part Number: TPS65311-Q1

Hi,

Closed window time is mentioned typical value(=twd/4) only. on the datasheet

However the twd is guaranteed min/max value.

Actually, is closed window time guaranteed(min:18/4=4.5ms max;22/4=5.4ms)?

Best Regards,

Kuramochi

TPIC8101EVM: TPIC8101EVM does not work. Is the cause individual trouble?

K.N — Tue, 20 Dec 2016 01:33:29 GMT

Part Number: TPIC8101EVM
Other Parts Discussed in Thread: TIGER, TPIC8101

Hello team

From Engineering Center of an Automotive Ｍaker of japan,
An inquiry comes.

According to User's Guide, I operate it.
All jumper setting does not have any problem, too.
(I know that the TIGER board's HEX jumper should be removed and 5V should be selected. )

The GUI displays it, but following error returns when I input.

ERROR-TIGER:ERROR:***WRITE to USB --HID-- *** Command=0xB
ERROR-TIGER:ERROR:***WRITE to USB --HID-- *** Command=0x44

The 5V is not supplied to VDD of TPIC8101.
In addition, CLK frequency of XIN is not supplied.

Is the cause individual trouble?
If there are something, the thing that I should confirm it, please tell me.

Best regards,
Keishi,Nishijima
Japan CSC

TPS74801-Q1: TPS74801TDRCRQ1_without define θJB in datasheet

Jin Lin — Tue, 20 Dec 2016 01:30:41 GMT

Part Number: TPS74801-Q1

Hi team,

May I know why TPS74801-Q1 DRC footprint without define θJB in datasheet, please see the capture as below from DS.

TPS65381-Q1: maximum Reset Extension delay time

Shinji Tsuji — Mon, 19 Dec 2016 08:48:14 GMT

Part Number: TPS65381-Q1

Hi team,

I would like to know the maximum allowable Reset Extension time of TPS65381-Q1.

It is described in the datasheet that if Rrsext is OPEN, the device is stucked in a RESET state.

And the equation of this delay is Trstext=0.148*(R+8.5).

How much is the maxim allowable Trstext?

Since my customer having trouble in the field, your quick response is very much appreciated.

regards,

BOOSTXL-DRV8301

Shashank more — Sat, 17 Dec 2016 10:38:20 GMT

Other Parts Discussed in Thread: DRV8301

hello,

I am using BOOSTXL-DRV8301 board.When i tried to use it with 55VDC battery supply,DRV8301 get burned.

So,can anyone tell me the problem??

TPS65381-Q1: Switching the Overvoltage, Undervoltage and Overtemperature bits thru Software

Mihir Gupta65 — Sat, 17 Dec 2016 09:13:25 GMT

Part Number: TPS65381-Q1

Hi Team,

I have a customer who is using the TPS65381-Q1. They now want to test the reaction of their driver software on the external MCU to the overvoltage, undervoltage and overtemperature flags. Is it possible to somehow toggle these relevant register bits in VMON_STAT_1 , VMON_STAT_2, and SAFETY_STAT_1 through software (like an SPI write?) rather than actually providing the external phyiscal condition (e.g. short circuit, high temperature)?

In case it is not possible to write to these bits, are there any recommended physical test conditions or circuits for overvoltage, undervoltage and overtemperature testing?

Thanks and Regards,

Mihir,

FAE - Germany

AMC6821-Q1: Do you know any automotive grade fan suppliers which works with AMC6821-Q1?

Wayne Liu — Thu, 15 Dec 2016 00:17:19 GMT

Part Number: AMC6821-Q1

Do you know any automotive grade fan suppliers which works with AMC6821-Q1? thanks.