Datasheet

VFC Sense Resistor Gain +
409.6
(R
s
)
Digital Filter +
2250
VDF
bq2060A
SLUS500D –OCTOBER 2001– REVISED OCTOBER 2011 www.ti.com
The 16-bit VFC Sense Resistor Gain in EE 0x6a–0x6b scales each VFC interrupt to mAh. VFC Sense Resistor
Gain is based on the resistance of the series sense resistor. The following formula computes a nominal or
starting value for VFC Sense Resistor Gain from the sense resistor value.
(5)
Sense resistor values are limited to the range of 0.00954 to 0.100 Ω.
Digital Filter
The digital filter threshold, VDF (µV), is set by the value stored in Digital Filter EE 0x52.
(6)
Cell Characteristics
Battery Pack Capacity and Voltage
Pack capacity in mAh units is stored in Pack Capacity EE 0x3a–0x3b. In mAh mode, the bq2060A copies Pack
Capacity to DesignCapacity(). In mWh mode, the bq2060A multiplies Pack Capacity by Design Voltage EE
0x12–0x13 to calculate DesignCapacity() scaled to 10 mWh. Design Voltage is stored in mV.
The initial value for Last Measured Discharge in mAh is stored in EE 0x38–0x39. Last Measured Discharge is
modified over the course of pack usage to reflect cell aging under the particular use conditions. The bq2060A
updates Last Measured Discharge in mAh after a capacity learning cycle. The bq2060A uses the Last Measured
Discharge value to calculate FullChargeCapacity() in mAh or 10 mWh mode.
Table 10. EEPROM Memory Map
Data Data
EEPROM NiMH Li-Ion
Name Chemistry
Address Example Example
MSB LSB MSB LSB
0x00 0x01 Check Byte 1 Li-Ion, nickel 15487 3c 7f 15487 3c 7f
0x02 0x03 Remaining Time Alarm Li-Ion, nickel 10 minutes 00 0a 10 minutes 00 0a
0x04 0x05 Remaining Capacity Alarm Li-Ion, nickel 350 mAh 01 5e 400 mAh 01 90
0x06 EDV A0 Impedance Age Factor Li-Ion, nickel 0 — 00 0 — 00
0x07 EDV TC Cold Impedance Factor — 0 — 00 3 — 03
0x08 Misc Options — 0 — 00 0 — 00
0x09 Safety Overtemperature — 0 — 00 0 — 00
0x0a 0x0b Charging Voltage Li-Ion, nickel 18000 mV 46 50 12600 mV 31 38
0x0c 0x0d Reserved — 128 00 80 128 00 80
0x0e 0x0f Cycle Count Li-Ion, nickel 0 00 00 0 00 00
0x10 0x11 Reserved — 0 00 00 0 00 00
0x12 0x13 Design Voltage Li-Ion, nickel 12000 mV 2e e0 10800 mV 2a 30
0x14 0x15 Specification Information Li-Ion, nickel v1.1/PEC 00 31 v1.1/PEC 00 31
0x16 0x17 Manufacture Date Li-Ion, nickel 2/25/99=9817 26 59 2/25/99=9817 26 59
0x18 0x19 Serial Number Li-Ion, nickel 1 00 01 1 00 01
0x1a 0x1b Fast-Charging Current Li-Ion, nickel 4000 mA 0f a0 3000 mA 0b b8
0x1c 0x1d Maintenance Charging Current Li-Ion, nickel 200 mA 00 c8 0 mA 00 00
0x1e 0x1f Pre-Charge Current Li-Ion, nickel 800 mA 03 20 100 mA 00 64
0x20 Manufacturer Name Length Li-Ion, nickel 9 — 09 9 — 09
0x21 Character 1 Li-Ion, nickel B — 42 B — 42
0x22 Character 2 Li-Ion, nickel E — 45 E — 45
0x23 Character 3 Li-Ion, nickel N — 4e N — 4e
0x24 Character 4 Li-Ion, nickel C — 43 C — 43
0x25 Character 5 Li-Ion, nickel H — 48 H — 48
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