I want to set up a charging circuit with a bq2002 IC as below: VCC = 5V However

Question

I want to set up a charging circuit with a bq2002 IC as below:

VCC = 5V

However I am not sure what the resistor values R3, R4 and RT should be. I've read thought the datasheet: http://www.ti.com/lit/ds/symlink/bq2002.pdf but I can't find out how to find the resistor values. Any guidance would be much appreciated.

Vcc PACK RT Vcc RB1 R3 BAT TM Ts bq2002/F bq2002/F RB2 IT R4 Vss Vss Mid-level Thermistor connection BAT pin Connection setting for TM NTC negative temperature coefficient thermistor. Fg2002WF01.eps

Explanation / Answer

Accirding to datasheet theaximum current for TM setting is 250 micro ampere. So you should use resistor in the dividor circuit accordingly. 5volt/(250*10'^-6) = 0.2* 10^5 . You can say that divider circuit needs 20 kiloohm resistance. You can set the values of r3 and r4 qccordingly.

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