Rainbow-electronics DS2784 Manual do Utilizador descarregar pdf (Página 12)

DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication

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Table 2. VOV Threshold

VOV BIT FIELD V

0 0 0 0 0 4.248 1 0 0 0 0 4.404

0 0 0 0 1 4.258 1 0 0 0 1 4.414

0 0 0 1 0 4.268 1 0 0 1 0 4.424

0 0 0 1 1 4.277 1 0 0 1 1 4.434

0 0 1 0 0 4.287 1 0 1 0 0 4.443

0 0 1 0 1 4.297 1 0 1 0 1 4.453

0 0 1 1 0 4.307 1 0 1 1 0 4.463

0 0 1 1 1 4.316 1 0 1 1 1 4.473

0 1 0 0 0 4.326 1 1 0 0 0 4.482

0 1 0 0 1 4.336 1 1 0 0 1 4.492

0 1 0 1 0 4.346 1 1 0 1 0 4.502

0 1 0 1 1 4.356 1 1 0 1 1 4.512

0 1 1 0 0 4.365 1 1 1 0 0 4.522

0 1 1 0 1 4.375 1 1 1 0 1 4.531

0 1 1 1 0 4.385 1 1 1 1 0 4.541

0 1 1 1 1 4.395 1 1 1 1 1 4.551

Table 3. COC, DOC Threshold

OC[1:0] BIT FIELD V

COC

(mV) V

DOC

(mV)

0 0 -23.5 35.5

0 1 -36 48

1 0 -48 72

1 1 -72 96

Table 4. SC Threshold

SC0 BIT FIELD V

(mV)

0 150

1 300

VOLTAGE MEASUREMENT

Battery voltage is measured every 440ms on the V

pin with respect to V

. Measurements have a 0 to 4.99V

range and a 4.88mV resolution. The value is stored in the voltage register in two’s complement form and is updated

every 440ms. Voltages above the maximum register value are reported at the maximum value; voltages below the

minimum register value are reported at the minimum value.

VOLTAGE REGISTER FORMAT

MSB—ADDRESS 0Ch LSB—ADDRESS 0Dh

S 2

X X X X X

MSb LSb MSb LSb

“S”: Sign Bit(s), “X”: Reserved

Units: 4.886mV

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 37 38

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