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BQ76920: how to reduced power consumption

April 14, 2019, 11:53 pm
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Part Number:BQ76920

dear sir/madam,

I'm working on bq76920 based BMS with atmega328. it is working fine. Now I wanted to reduce the power consumption on the circuit. I have 2 options. one is I reduced the clock frequency and other is put MCU in sleep mode. 

I'm thinking to put MCU for sleep for  250ms. for I that I would use external RTC, I can't use the internal watchdog timer because the internal watchdog timer is not precise. So my question what if check register after say 240 ms or 270 or 300 ms. ms. will it affect the readings?

when a battery is in overdischarge mode, how should put my MCU in sleep? I mean what input I should take and how I can wake it from sleep.

Thank you in advance.

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TPS23861: TPS23861 inconsistent start up and working

April 15, 2019, 12:01 am
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Part Number:TPS23861

Hi Expert,

I am using the TPS23861 for a single port PoE 802.3at adapter. I have a working prototype but the circuit seems to function inconsistently i.e. when we apply power to the circuit it sometimes detects, classifies and applies power to the PD properly but at other times it doesn't perform any of those functions. Can you please help me with this problem.

Thank you.

Regards,

Mikha.

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UCC27714: Operation Under Negative HS Voltage Condition

April 15, 2019, 12:09 am
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Part Number:UCC27714

Hi Support team

On D/S page 24, Operation Under Negative HS Voltage Condition, why the part number become to UCC27724?

is this typo or something else? if this is typo, is this possible to correct on that

thanks a lot

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BQ28Z610: Function comparing between BQ28Z610 and BQ27750

April 15, 2019, 12:13 am
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Part Number:BQ28Z610

Hello professional,

My customer has question for BQ28z610.

What is the difference regarding the function between BQ28z610 and BQ27750 except supported cell counts.

Best regards,

Kazuki Kuramochi

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TPS5430: Using the ENA pin

April 15, 2019, 12:32 am
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Part Number:TPS5430

Hi,

I would like to use the ENA pin on the device to disable it.

I need to control it in without an MCU.

I saw in the datasheet that it should be used with open-drain or open-collector logic.

My questions are:

1. How much voltage can the ENA pin withstand?

2. Is it possible to just connect it to the + of the circuit (based on the voltage limits from 1.) using a diode to prevent reverse connectivity or open drain is a must?

Thanks,

Tomer

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CSD19537Q3: Thermal Resistance values required for Thermal Simulation

April 15, 2019, 12:33 am
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Part Number:CSD19537Q3

Hello TI Team

Greetings 

We need some parametric values of below components for Thermal Simulation . I highlighted that in green. Please provide that
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BQ20Z75-V180: The static current of BQ20Z75 is on the high side

April 15, 2019, 12:36 am
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Part Number:BQ20Z75-V180

Hi Sir

I have a customer who is using BQ20Z75 and finds that the static current is abnormal. About 8% of the chip's static current exceeds 600uA, but the specification does not indicate the exact range of the static current. How can I persuade the customer that the static current of 600uA is normal.

There is only a median in the specification

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CSD16407Q5: To find CSD16407Q5 ESD rating

April 15, 2019, 12:51 am
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Part Number:CSD16407Q5

Hi Expert,

The customer need to know the ESD rating of CSD16407Q5 DS.

Pls advice.

Best regards,

Eric Lai

  

Field Application Engineer

Texas Instruments Taiwan Limited

O: +886-2-2175-2582

M: +886-909-262-582

E-Mail:Eric.Lai@ti.com  

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BQ79606-Q1: when will the IC MP?

April 15, 2019, 1:18 am
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BQ20Z75: Where can I find the EVM reference design of BQ20Z75

April 15, 2019, 1:20 am
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Part Number:BQ20Z75

HI

Where can I find the EVM reference design of BQ20Z75，
BQ20Z75 static current in the circuit board is too large, is there a way to reduce the static current

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TPS92638-Q1: how to configure unused Iout pins

April 15, 2019, 1:35 am
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Part Number:TPS92638-Q1

Hi Support team, how to configure unused Iout pins as below picture.

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CCS/BQ27750: Code Composer Studio™ forum

April 15, 2019, 2:01 am
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Part Number:BQ27750

Tool/software: Code Composer Studio

Hi TI team

I am using the IC for the BQ27750, and I have a problem with the calculation of the low temperature capacity of the battery.

ChemID has no low temperature. We tried to calculate a gg file by means of GPC RB. After the application, a condition occurs. The FCC is at -7 °C and is lowered from 2900 mAh to 100 mAh. This is the battery capacity. Unreasonable, I would like to ask if there is any solution to this problem.

Thank you!!

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TPS22810-Q1: QOD pin - AMR and flexibility of usage

April 15, 2019, 2:02 am
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Part Number:TPS22810-Q1

Hello.

In my design, I am considering using the TPS22810-Q1's QOD function to discharge a different point other than VOUT. I tried searching for the pin's AMR and operating range in the datasheet, but couldn't find anything. 

So I wanted to know what are the pin's AMR and operating voltage ranges, both positive and negative, in regard to VIN, VOUT and GND.

Thanks,

Sam.

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TPS61099: Questions with Down mode

April 15, 2019, 2:06 am
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Part Number:TPS61099

Hi sir,

If TPS61099 operates ‘Down mode’ for long time, will that causing side effect? E.g. shorten chip life cycle

Do the inductor current calculation still follow Equation 4 in Down mode? (refer datasheet, SLVSD88K –JULY 2016–REVISED MAY 2018)?

If TPS61099 output current is limit, the Vout is near Vin, that means it enters ‘Pass Through’ mode, right?

Thanks.

 

B.R., Hedy

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CSD87350Q5D: What's the side effect to input

April 15, 2019, 2:13 am
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Part Number:CSD87350Q5D

Hi Team,

For CSD87350, TI said this is optimized for 5V. Is this mean the VDD of driver IC are 5V?

For some application, the VDD are 5V. But there are a voltage drop caused by bootstrap diode. 

 If the voltage of VGS lower than 4.5V, what's the side effect for it? 

Below is an example that apply 5V on VDRV but will got <=4.5V VGS for high side FET.

Thanks

Shaq

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TLC5941-Q1: How to input GSCLK

April 15, 2019, 2:22 am
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Part Number:TLC5941-Q1

Does TLC5941 support Auto_Repeat Mode?

As spec. say, we need to input 4096 GSCLKs in one period.

If we can't input fix GSCLK count, could we just input continuous GSCLK?

(if no Auto_Repeat Mode, what will happen if GSCLK run over 4096?)   

If we can just input continuous GSCLK, will the frequency as higher as better?

how will the frequency effect LED driver result?

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BQ25150: comparison table for the

April 15, 2019, 2:23 am
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Part Number:BQ25150

Hi team,

Could you please help fill the blanks of the BQ25150 and the BQ24074 in the comparison table we did in below(or attached)?

We didn't see the parameters in the datasheet and need your help.

Also put the BQ25606 FYR since there are different structure.

Thank you! 

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how to design the high frequency transformer(P,Aux,S winding)for isolated Smps

April 15, 2019, 2:55 am
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hello,

Have to design a high frequency transformer for my my offline isolated multi voltage output SPMS.

I didn't design transformer before everytime i just used the simple transformer with primary and secondary winding.

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UCC28056: Gate driver voltage abnormal

April 15, 2019, 3:01 am
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Part Number:UCC28056

Hi,

From the prototype of UCC28056 sample board. We found the gate driver voltage is only 6V(even if remove MOSFET), is there any mechanism that makes driver voltage down to 6V?

Thank you.

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TPS63802: TPS63805 and TPS63802

April 15, 2019, 3:03 am
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Part Number:TPS63802

Hi,

My customer evaluated the TPS63805 EVM.
And the customer wants a sample of TPS63805.

However TPS6 has disappeared from the TI Web.
Could you tell me the reason why it disappeared.
And Should I introduce TPS63802 instead　of TPS63805 ?

Best regards,
Yusuke

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