I am looking for design assitance for the BQ2060A battery gas gauge. I have previously used the BQ2050h chip, so am familiar with the basics of gas gauging. I am looking to use this chip on the system side i.e. connected to an application circuit, rather than onboard a battery. My previous design used only SLA batteries but my next iteration has to cater for both. IS the BQ2050h still usuable, as the software comms via HDQ with a microcontroller has already been done? The application circuit will be used with either a 12V Li-ion or SLA battery, hence the BQ2060a will need to cater for both chemistries. Which battery is in connected will be set by a user controlled switch. My first question is with regard to the EEPROM that needs to be connected to the chip. What type of EEPROM is required, volatile or non-volatile? I can see that VOUT (pin 6) supplies power to the EEPROM but I cannot find details of what voltage this actually is. I gather the its size needs to be 128 bytes of 8-bits of data. How is this EEPROM programmed at first usage? Via SMBus or HDQ16? I have read about the PC software associated with the chip, but what is the hardware connection required. Do I need to plan to connect the BQ2060A + EEPROM to this PC software. I presume blank EPPROM will be of no use and cause configuration problems. Will I require 2 swappable sets of EEPROM for each type of battery and how will I swap between them? I plan to interegate the guage for battery capacity information. Does this chip need to execute a learning cycle similar to the BQ2050h? With the batteries to be connected, access to the individual cells will not be available? What connection is then required to the Vcell 2,3 pins? Also no thermistor connection will be available. How will I connect these pins? Figure 5 of the datasheet appears to show the chip being powered from the battery pack. I will be looking to power the gauge from a 5V supply. Is this possible? Or is 3.3V needed?
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