BQ51051B: SUPPORT for SOFTWARE BQ5105XB NTC Calculator Tool (Rev. A)

Hello

I can run the calculation for you, what are your requirement?

Hi Bill in my requirement is temperature ranges for NTC resistor is 0deg to 49deg please give the resistor values for below network & NTC  Thermistors is 10Kohms 3% Beta value 3435K 1%

Hi 

The 49C hot limit is going to be a problem. Circuit can be adjusted using external resistors but was designed for a higher hot temp and may not be able to meet the above requirements.  Still looking at it.

Is another NTC an option?

Hi Bill thanks for your response

1.please suggest if you have any NTC part and the  Bheta value  for this requirement and share the resistor values.

2.Also for the same requirement consider temperature ranges for NTC resistor is 0deg to 60deg please give the resistor values for below network & NTC  Thermistors is 10Kohms 3% Beta value 3435K 1%

Hi 

With NTC Thermistors 10Kohms Beta value 3435K and R1-200 ohms range is 0C to 62C.  

Some other values to consider:

1.) 0C to 50C  -- Beta = 5500k with R1=800 and R3=60k

2.) 0C to 50C -- Beta = 5000k with R1=400 and R3=72k

3.) 0C to 55C -- Beta = 4500k with R1=600 and R3=95.5k

4.) 0C to 57C -- Beta = 4000k with R1=350 and R3=160k

Hi BIll thanks for your inputs in BQ5105xB datasheet i am seeing below data is it okay to go with the higher beta values since timing  parameters depends on this, And NTC more than 4500 beta value not available

Hi Bill please reply to my previous question