Rainbow-electronics DS2778 Bedienungsanleitung PDF herunterladen (Seite 23)

DS2775/DS2776/DS2777/DS2778

2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with

Protector and Optional SHA-1 Authentication

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The RAAC register reports the capacity available under the current temperature conditions to the the active-empty

point in absolute units of milliamps/hour (mAh). RAAC is 16 bits.

The RSAC register reports the remaining battery capacity available under the current temperature conditions to the

standby-empty point capacity in absolute units of milliamps/hour (mAh). RSAC is 16 bits.

The RARC register reports the remaining battery capacity available under the current temperature conditions to the

active-empty point in relative units of percent (%). RARC is 8 bits.

The RSRC register reports the remaining battery capacity available under the current temperature conditions to the

standby-empty point capacity in relative units of percent (%). RSRC is 8 bits.

Calculation of Results

RAAC [mAh] = (ACR[mVh] - AE(T) x FULL40[mVh]) x RSNSP [mhos]*

RSAC [mAh] = (ACR[mVh] - SE(T) x FULL40[mVh]) x RSNSP [mhos]*

RARC [%] = 100% x (ACR[mVh] - AE(T) x FULL40[mVh])/{(AS x FULL(T) - AE(T)) x FULL40[mVh]}

RSRC [%] = 100% x (ACR[mVh] - SE(T) x FULL40[mVh])/{(AS x FULL(T) - SE(T)) x FULL40[mVh]}

RSNSP = 1/R

SNS

MSB—ADDRESS 02h LSB—ADDRESS 03h

MSb LSb MSb LSb

UNITS: 1.6mAh

Figure 16. Remaining Active Absolute Capacity (RAAC) [mAh]

MSB—ADDRESS 04h LSB—ADDRESS 05h

MSb LSb MSb LSb

UNITS: 1.6mAh

Figure 17. Remaining Standby Absolute Capacity (RSAC) [mAh]

MSB–ADDRESS 06h

MSb LSb

UNITS: 1%

Figure 18. Remaining Active Relative Capacity (RARC) [%]

MSB–ADDRESS 07h

MSb LSb

UNITS: 1%

Figure 19. Remaining Standby Relative Capacity (RSRC) [%]

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Rainbow-electronics DS2778 Bedienungsanleitung Seite 23