Dear TI,
I would like to ask a few questions regarding the TPS92661-Q1.
Application is car turn signal.
1. Part No, : TPS92661-Q1
2. Inquiries
(1) When setting PWM CLOCK DIVIDER REGISTER, ask if there is a way to increase the number of dividers.
At present, when Divide by: 64 is used, one cycle of sequential lighting is 850ms.
If you increase the cycle time, you can't increase the cycle because 64 is the maximum that you can divide on the data sheet.
Please check if there is a fixable method in METRIX IC without changing PWM CLOCK in MCU.

(2) How to control LED individually when LED turns on. (Time, ON / OFF, Register Setting Method)

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TMS320F28377D: What is the difference of Watchdog reset and /XRS pin reset in F28377D?

August 30, 2019, 1:04 am

≫ Next: BQ40Z50-R2: I2C communication

≪ Previous: TPS92661-Q1: Control Registers Question

Part Number: TMS320F28377D

Hi,

What is the difference of Watchdog reset and /XRS pin reset in F28377D?

Except RESC register, any other register have different behavior?

thanks,

best regards,

Simen

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BQ40Z50-R2: I2C communication

August 30, 2019, 1:05 am

≫ Next: TMS570LS3137-EP: TMS5703137CGWTMEP

≪ Previous: TMS320F28377D: What is the difference of Watchdog reset and /XRS pin reset in F28377D?

Part Number: BQ40Z50-R2

First of all thanks for your response sir.you are giving very helpful information.But sir problem is that i am very new to programming in stm32 ,so unable to understand what code should i write in main program for making communication between bq25700 and stm32ubemx through smbus.Now i am able to generate the Code in stm32ubemx,so after that i dont have any idea what should i write in main program.So please help me ,i am trying from last week on it.Eagerly want to learn from the basic.

Thanks

Mohan

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TMS570LS3137-EP: TMS5703137CGWTMEP

August 30, 2019, 1:06 am

≫ Next: LMK05318: Reload the EEPROM during run-time

≪ Previous: BQ40Z50-R2: I2C communication

Part Number: TMS570LS3137-EP

Hi Team,

What longevity can we expect using the TMS5703137CGWTMEP ?

thanks

regards

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LMK05318: Reload the EEPROM during run-time

August 30, 2019, 1:07 am

≫ Next: TPS5410: Iout consideration for Lmin calculation

≪ Previous: TMS570LS3137-EP: TMS5703137CGWTMEP

Part Number: LMK05318

Dear Sir:

About the LMK05318 on our products, we wrote an application (under ARM CPU + Linux OS) to program its internal EEPROM for the manufacture test.

1) In the datasheet, Figure 53. Device POR Configuration Sequence, it said:

>> Registers initialize from EEPROM/ROM and I2C/SPI, Control & Status pins activate (after hard reset only).

2) In the SNAU237A (LMK05318 Registers), Chapter 13 R12 Register, it said:

>> Bit[7] : RESET_SW : Software Reset ALL functions

>> Writing a 1 will cause the device to return to its power-up state apart from the registers and the configuration controller.

>> The configuration controller is excluded to prevent a re-transfer of EEPROM data to on-chip registers.

Q-3) After the EEPROM was programmed during run-time, can we set the RESET_SW of R12 register to 1 to re-load the parameters

in the internal EEPROM into the registers and make the new registers' settings effect immediately?

Q-4) If not, during run-time, could you tell us how to re-load the parameters in the internal EEPROM into the registers and make the new registers' settings effect immediately?

Thank you.

Best regards.

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TPS5410: Iout consideration for Lmin calculation

August 30, 2019, 1:11 am

≫ Next: TMS570LC4357: FLASH bank 7 data differs after re-poweron

≪ Previous: LMK05318: Reload the EEPROM during run-time

Part Number: TPS5410

Hi,

What is the Iout current needed to be considered for the Lmin calculation of TPS5410

When we are considering Iout max (500mA) the Lmin is 40uH

Inom is 300mA . So the Lmin is 67uH. Iout Min is 250mA. So Lmin =80uH

So for the Lmin calculation which current needed to be considered Iout (max) /Iout min/Iout(Nom)?

Thanks and Regards

Sandeep

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TMS570LC4357: FLASH bank 7 data differs after re-poweron

August 30, 2019, 1:14 am

≫ Next: TPS63050: TPS63050YFFR land pattern layout information

≪ Previous: TPS5410: Iout consideration for Lmin calculation

Part Number: TMS570LC4357

Hello,

I'm trying to write 1024 bytes into the Bank7 ( starting at address 0xF0200000 ) using the F021FlashAPI.

After the Program call ( that follows the Recommended Program Flow of F021FlashAPI Reference Guide, http://www.ti.com/lit/ug/spnu501h/spnu501h.pdf ) from CCS Memory Browser I see the data written correctly.

The problem rises when I shutdown and re-power on the TMS570 because from the CCS Memory Browser I see that the data is not completely equal from the one that I stored in the previous session.

Another strange thing happens: if I enable the automatic refresh of the Memory Browser after the re-power on I see random bits starting from 0xF0200000 that change their values.

Thanks in advance

Antonio

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TPS63050: TPS63050YFFR land pattern layout information

August 30, 2019, 1:15 am

≫ Next: LM25145: Audible noise from inductor

≪ Previous: TMS570LC4357: FLASH bank 7 data differs after re-poweron

Part Number: TPS63050

Hi Sir,

Could you help provide land pattern layout information?

I search in TI web:

http://www.ti.com/lit/ml/mxbg163b/mxbg163b.pdf

but don't show "D" & "E" value.

In the meanwhile, TI website show DSBGA(12pin)’s length is 2.0mm, but TPS63050YFFR data show the body size 1.56*1.16mm.

Please confirm the package size of DSBGA(12pin).

Regards,

Driscoll

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LM25145: Audible noise from inductor

August 30, 2019, 1:17 am

≫ Next: TPS22925: Behavior at low load current

≪ Previous: TPS63050: TPS63050YFFR land pattern layout information

Part Number: LM25145

In our design LM25145 IC is used for 5V/9A. At no-load condition inductor generates some Audible Noise, we use the same circuit that design in web bench. I don't Understand Why inductor generates Audible noise?

To remove this noise which are the steps I can follow?

Please Find attached web bench design for LM25145 IC.

Thanks & Regards.

(Please visit the site to view this file)

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TPS22925: Behavior at low load current

August 30, 2019, 1:23 am

≫ Next: TM4C123AE6PM: Controller not booting up on power cycle

≪ Previous: LM25145: Audible noise from inductor

Part Number: TPS22925

Hi team,

can you answer the following customer question?

For an application with battery operation (2 x AA) = 3V, I am looking for a switch with an extremely low voltage drop.
I have TPS22925B in mind.
This has a nearly constant Ron for a wide range of Vin.
However, I only need a maximum of 1.5mA as load current. How does the switch behave in this range?

Thank you,

Franz

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TM4C123AE6PM: Controller not booting up on power cycle

August 30, 2019, 1:24 am

≫ Next: BQ24753A: What is the reason for using bidirectional current flow switch?

≪ Previous: TPS22925: Behavior at low load current

Part Number: TM4C123AE6PM

Hi Team,

When we program the controller (TM4C123AE6PMIR) through CCS, board works properly.

But when I disconnect debugger and power cycle the board, program doesn't execute and board does not work.

We have 16MHZ crystal on OSC0 (Pin 40) and OSC1 (Pin 41), crystal does not oscillate after power cycle, looks like no crystal drive signal from controller.

All power rails on board are measuring required voltage.

When we tried programming controller with .BIN file using J-Flash Lite (using J-Link debugger), board doesn't work.

We tried simple program to toggle LED on our board. We are facing same problem as stated above for LED toggle program as well.

We tried unlocking using XDS200 debugger, still we are not able to solve the issue. T

he same issue we have observed on two boards with TM4C123AE6PMIR controller and one board with TM4C129XNCZAD controller.

We have multiple boards of these configuration, working as intended since couple of years now. Hence we assume circuit to be functional.

Recently we have observed above issue on three boards, which we are trying to resolve.

Awaiting quick help.

Thank you

Krishna

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BQ24753A: What is the reason for using bidirectional current flow switch?

August 30, 2019, 1:27 am

≫ Next: SN74AXC8T245: what is the leakage current for Ax and Bx pin

≪ Previous: TM4C123AE6PM: Controller not booting up on power cycle

Part Number: BQ24753A

Dear All,

Please consider the schematics provided in the datasheet of BQ24753A:

Why should to place back to back mosfets to flow current in two directions to/from adapter?

Best Regards, Rasool

↧

SN74AXC8T245: what is the leakage current for Ax and Bx pin

August 30, 2019, 1:29 am

≫ Next: SN74LVC1G17: What is Vf variation of parasitic diode connected from "GND" pin to "A" input pin?

≪ Previous: BQ24753A: What is the reason for using bidirectional current flow switch?

Part Number: SN74AXC8T245

Dear e2e,

what is the leakage current for Ax and Bx pin?

BR,

Jason

↧

SN74LVC1G17: What is Vf variation of parasitic diode connected from "GND" pin to "A" input pin?

August 30, 2019, 1:31 am

≫ Next: ISO1212: ISO1212 With Sourcing Inputs

≪ Previous: SN74AXC8T245: what is the leakage current for Ax and Bx pin

Part Number: SN74LVC1G17

Hello guys,

One of my customers has been used SN74LVC1G17 for many their products long time.

Their input signal voltage connected to the device "A" pin is -0.4V. So they always tested Vf of parasitic diode connected from "GND" pin to "A" input pin of all SN74LVC1G17 they use.

The Vf average volta was 0.7V~0.6V. But recently they found the Vf voltage was changed to about 0.46V. The Vf voltage went down from 0.6V~0.7 to 0.46V.

They want TI to answer the following questions. Could you give me your comments for them?

Q1. They know that Vf is changed by temperature and flowing current value.

They want to know whether the Vf is changed between factories of front end or not?

Q2. Also they want to know whether the Vf is changed between wafer material (ingot) lot?

Q3. What is Vf variation of parasitic diode connected from "GND" pin to "A" input pin roughly?

Your reply would be much appreciated.

Best regards,

Kazuya.

↧

ISO1212: ISO1212 With Sourcing Inputs

August 30, 2019, 1:31 am

≫ Next: AM3359: PRU firmware in TI-RTOS

≪ Previous: SN74LVC1G17: What is Vf variation of parasitic diode connected from "GND" pin to "A" input pin?

Part Number: ISO1212

Hello Team

Customer is using ISO1212 with sourcing input. When the input signal higher than 80k， the output will always high. Could you help verify in EVM board?

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