Part Number:BQ24610
Dear Kedar, good morning
I’d like to charge 1-cell lead-acid battery. I have 5.1V, 5A power supply.
You recommended to use bq24610. Please, see figure 19 of bq24610 datasheet, page 26.
Please, answer:
1) I need not in Input Adapter Current Regulation. Can I set RAC resistor = 0 Ohm and feed low voltage (e.g. 0.5 V) to ACSET?
2) I need to connect load to VBAT only (PACK+). Can I remove Q3 transistor?
3) If I remove Q3 transistor, then can I remove (to “short”) Q1 and Q2 transistors?
4) R11, R12, R13 are 10 k. But for LEDs a current of 2...5 mA is needed. With such values of resistors, the current will be much less. Maybe should do less R11, R12, R13 values?
5) As I charge lead-acid battery, I need a temperature compensation. I see circuit on the figue 2 in SLVA437A and Rtc =100 k thermistor (in parallel with R23). Please, advise which type of thermistor Rtc to use?
6) There are equations (1) and (2) in SLVA437A, page 3. It seems to me that instead of Vref there should be VFB. On page 5, instead of Vref, the value of 2.1 V is substituted - I think 2.1 V it is right, and this is not Vref (3.3V).
TIA
Sincerely,
Vladimir Naumenkov
www.agat.by