LP3910 datasheet(55/72 Pages) TI1

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LP3910

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SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015

8.6.6 ILIMIT Register (03)H Current Limit Register

D7–2

D1–0

Access

Read only 0

Data

Reserved

USB Current Limit

00: controlled by USBISEL pin

[low = 100 mA, high = 500 mA]

01: 100 mA

10: 500 mA

11: 800 mA

Reset

n/a

2’b00

8.6.7 ADCC Register (0a)H ADC Control Register

D1–0

Access

R/W

Read Only

R/W

Data

VRANGE

IRANGE

ADC Overflow Data Ready

Start

ADC Enable

ADC source

Conversion

selection

0: 2.6 V – 3.5

0: 0 mA – 605 mA

0: no overflow

0: no data

0: default

0: Disabled

00: battery voltage

1: 2.6 V – 4.4

1: 0 mA – 1100 mA 1: overflow

1: data ready

1: start

1: Enabled

01: battery charge

conversion

current

10: ADC1

11: ADC2

Reset

8.6.8 ADCD Register (0b)H ADC Output Data Register

Charge current 0 A to 1.1 A mirrored to 0 µA to 250 µA, ADC measures voltage drop across RSENSE 4.64 kΩ.

D7–0

Access

Read Only 0

Data

Battery voltage:

8’h00 = 2.6V

8’hFF = 3.5V

1 LSB = 0.9 / 256

= (3.5 mV) range 0

8’h00= 2.6V

8’hFF = 4.4 V

1 LSB = 1.8 /

256 = (7.0 mV) range 1

Battery charge current

8’h00 = 0

8’hFF = 0.6463 V = 605 mA

range 0

8’h00 = 0

8’hFF = 1.175V = 1100 mA

range 1

ADC1:

8’h00 = VREFH = 1.225V

8’hFF = 2*VREFH = 2.45 V

(1 LSB = VREFH/256)

ADC2:

8’h00 = VREFH = 1.225V

8’hFF = 2*VREFH = 2.45 V

(1 LSB = VREFH/256)

Reset

8’h00

8.6.9 IMR Register (0c)H Interrupt Mask Register

D7–0

Access

r/w

Data

1: Enable INTn (n=0…7) to pull IRQB low

0: Mask Interrupt source INTn

Reset

8’h00

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