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DS90UB953-Q1: How to strap into Coax mode on power-on?

June 19, 2019, 7:21 pm
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Part Number:DS90UB953-Q1

Hello,

I have a design which implements the DS90UB953-Q1 however I am unable to establish a link over coax with the deserializer (DS90UB954-Q1) upon power-on due to the DS90UB953 powering up into "TP" mode instead of Coax mode.  I am having trouble locating any information in the datasheet which describes how to strap coax mode.  Curiously, this TP/coax mode configuration is not an issue when I use the DS90UB953-Q1EVM, as it appears to strap into coax mode.  Upon further inspection it appears the EVM is not using suggested strap resistors for neither the MODE nor IDX divider network.  Is this the reason the evaluation module is able to strap into coax mode?  Can TI please provide documentation for how to replicate this functionality?

Thank you,
Christopher

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THS6212: THS6212 VS THS6214

June 19, 2019, 7:22 pm
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Part Number:THS6212

Hi，

One of my customer met the problem when using the THS6212 and THS6214, and the problem shows as below:

THS6212& THS6214 test waveform is compared as follows:

THS6212

THS6214

From the test waveform , we can find that harmonics appears  in the high frequency part. but THS6214 has no! and I don't know why does this happen?

I also show the design schematic to you, and hope you can give some suggestion!

BR!

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LM2903-Q1: Saturation voltage

June 19, 2019, 7:23 pm
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Part Number:LM2903-Q1

Hi team,

I would like to know the saturatoin voltage in our usecase.

Condition:

 Vcc is +5V and +12V

 Isink is 8mA

 Tj is full range

Could you provide me with the data in our conditions?

I hope that it is less than 700mV.

Best regards,

Tomoaki Yoshida 

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DCR010503: DCR010503 starts up current

June 19, 2019, 7:22 pm
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TIDA-00951: TIDA-00951 Operation method inquiry

June 19, 2019, 7:28 pm
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Part Number:TIDA-00951

TIDA-00951 There are some questions about the design board.
The HV side FET is described as full bridge driven.
However, there is no working waveform for the FET when in charge mode.
Is it Phase Shift?
Or is it traditional Hard Switching?
And does the LV side FET operate with synchronous rectification?

Here is the Center tap question for Trans.
In the circuit diagram, it is connected to the center tap of Trans primary side and the capacitor center. What does it do?
Or what are the benefits?

Here are some questions about Boost Mode Working: Cold Start.
Can I remove the cold start circuit if the HV capacitor is always maintaining a voltage above 350V?

Thank you for your help.

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CC2541: CC2541

June 19, 2019, 7:31 pm
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Part Number:CC2541

Hi, all.

I make Bluetooth Hid Keyboard and need some advise.

I use CC2541 and its my custom PCB.

My question is it :

I want to scan other devices when it connected one device.

For example, I connect my Keyboard to PC, and when I press button, I can find my keyboard in iPhone and connect to that.

Then when I type keyboard, it is typed on iPhone(not PC).

Is it possible? If so, how can I do that?

Thanks.

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LM5119: What risks will arise if the VCCDIS is left floating ,meanwhile the externally supplied bias which is coupled to the VCC pins through a diode is 12V?

June 19, 2019, 7:37 pm
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Part Number:LM5119

What risks will arise if the VCCDIS is left floating ,meanwhile the externally supplied bias which is coupled to the VCC pins through a diode is 12V?

In addition,can you help provide the internal power supply schematic of VCC?

Best Regards~

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DP83848K: Harmonic of 10Base-T compliance test

June 19, 2019, 7:40 pm
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Part Number:DP83848K

Hi all

Would you mind if we ask DP83848K?

The customer has question about "Harmonic of 10Base-T compliance test".

In this test, they need all "1" or "0" output data for the test.
They also need random pattern output for Template Test.
Is it possible to configure followings using register settings?
-All "1" or "0" output data
-Random pattern output

We know DP83822 is possible to configure these.
If this contains confidential, please send it using private message on E2E.

Kind regards,

Hirotaka Matsumoto

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TPS54260: power management forum

June 19, 2019, 10:20 pm
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Part Number:TPS54260

Hi team,

i want to know how it  is possible 100% duty cycle for the DC-DC buck converter like tps54260?. if d=1 then mosfet will remains on and there will drop in Rds(on) and energy stored in inductor is not free wheel anywhere which will leads in the unstable operation. so, could you please explain me the reason?.

regards and thanks,

badal kumar

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TPS3838: About Input signal slew rate to /MR pin

June 19, 2019, 10:30 pm
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Part Number:TPS3838

Hi,

Could you tell me about /MR pin and RESET signal?
Is there any limitation on the input voltage slew rate to the MR pin?

If the input voltage rise to /MR pin is slow,
Customer is concerned that RSET signals will be unstable.
Could you give me your advice?

Best Regards,
Yusuke

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TPS65235-1: Only Use Tone Detection

June 19, 2019, 10:31 pm
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Part Number:TPS65235-1

Hi,

Could you please tell me whether TPS65235-1 can be used as only use tone detection ?
If possible, I am considering reducing BOM cost as TPS65235-1 isn't used as the boost converter. So, could you please give me your advice ?
Additionally, please let me know if you have the reasonable solution.

Best regards,
Kato

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LM5160-Q1: LM5160-Q1

June 19, 2019, 10:40 pm
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Part Number:LM5160-Q1

Dear TI Team,

 

I have designed a Fly-buck converter (based on LM5160-Q1) using Webench Design Tool. The application is Auxiliary Power Supply for Hybrid Solar PV Inverter. The input voltage range is 44V to 54V (actually a 48V battery). The regulated isolated output voltage required is 15V (Vout_iso). The output current is Io=1.5A. The design file is here ((Please visit the site to view this file)). My question is how to connect Wurth Electronics 749196541 transformer (T1) to obtain Lp=68.4 uH ? It has triple primary and triple secondary winding. The datasheet of this transformer is here, ((Please visit the site to view this file)). I request you to give me the connection diagram to apply this transformer for Fly-buck configuration. Do we need to connect all primary windings in series and secondary windings in series?

Please also go through the design and confirm that the Webench design does not require any modification. I will straightway implement this design in hardware.

 

Thanks and Regards,

~Ajay M. Chole

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SN74LVC1G34: About Input voltage rise and fall slew rates

June 19, 2019, 10:41 pm
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Part Number:SN74LVC1G34

Hi,

Does the SN74LVC1G34 have a slew rate specification for the input signal?
If the rise and fall times are late,
Customers are concerned about unstable output.
Please give your advice on slew rate constraints of the input signal.

Best Regards,
Yusuke

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INA300: Asking for the INA300’s OCP trip point

June 19, 2019, 10:42 pm
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CCS/TMS320F28075: And pwm4 needs to lag pwm6 1us.Can implement this function?Is there any recommended method?

June 19, 2019, 10:43 pm
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Part Number:TMS320F28075

Tool/software: Code Composer Studio

And pwm4 needs to lag pwm6 1us of TMS320F28075 .Can implement this function?Is there any recommended method?

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BQ78Z100 Realizes Simple Charging and Discharging Function

June 19, 2019, 10:44 pm
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Hello, ADI engineer, I need to use BQ78Z100 to realize the charging and discharging function of two lithium batteries.Communication with BQ78Z100 through I2C is the STM32 series of ARM. Now, do BQ78Z100 have the driver code of ARM platform?Please help me, thank you!

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TMDSHVMTRINSPIN: How to populate M3-J5

June 19, 2019, 10:45 pm
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Part Number:TMDSHVMTRINSPIN

Hi

Sorry for we don't find the M3-J5 interface. How to do this operation?  

So far, we skip this operation, it's also running well. Thanks.

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DAC38RF82EVM: Performance at 3.84GHz +/- 250 MHz

June 19, 2019, 10:47 pm
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Part Number:DAC38RF82EVM

Customer wants to use DAC38RF8x to generate 3.84GHz +/- 250 MHz (total 500 MHz bandwidth) output. Could you please help to capture plot - with & without "Inverse SINC enable" ?

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TMS320F28379D: CAN certification document

June 19, 2019, 10:48 pm
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Part Number:TMS320F28379D

I was going through the data sheet TMS570LC4357 Hercules. They attached certificate documents for CAN and other protocols.

I see the same missing with TMS320F28379D data sheet, why it so? product not qualified for industrial or automotive grade and still got used up in the real world

does the product is still in the qualification process for getting used in the real world applications? or is it a documentation problem

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SN65LVDS100: Storage Temperature

June 19, 2019, 10:49 pm
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Part Number:SN65LVDS100

Hi E2E,

Good day!

May I know the storage temperature for SN65LVDS100D? I have checked the datasheet and there is no information about it.

Thank you for your usual support.

Best regards,

Franz

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