LP3910 datasheet(9/72 Pages) TI1

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LP3910

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SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015

7.7 Electrical Characteristics: Li-Ion Battery Charger

Unless otherwise noted, VDD = 5 V, VBATT = 3.6 V, CBATT = 4.7 µF, CCHG_DET = 10 µF, RIREF = 121 kΩ. Typical limits apply for

TJ = 25°C; minimum and maximum limits apply for TJ = 0°C to 125°C, unless otherwise specified.

(1) (2) (3) (4)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Minimum external USB

TJ = 25°C

VUSB

4.15

4.25

4.35

supply voltage

USB current limit = 500 mA

USBPWR detect

VUSB_HYST

110

hysteresis

TJ = 25°C

Minimum external adapter

CHG_DET

Adapter current limit = 1 A

4.4

4.5

4.6

supply voltage range

VFWD Schottky = 350 mV

CHG_DET input

VCHG_HYST

150

hysteresis

USB suspend mode, VUSB = 5 V

Quiescent current in USB

IUSB_SUSP

USBSUSP = USBPWR

µA

suspend mode

USBISEL = 0 V

–0.35%

4.2

0.35%

TJ = 25°C

Battery charge termination

−0.5%

4.1

0.5%

IPROG = 500 mA, ICHG = 50 mA

voltage tolerance

−0.5%

4.38

0.5%

VTERM_TOL

(selected in CHCTL

–1%

4.2

TJ = 0°C to 125°C

–1.5%

4.1

1.5%

Control Register)

IPROG = 500 mA, ICHG = 50 mA

–1.5%

4.38

1.5%

Full-rate charging current

from wall adapter input

CHG_DET = 5.25 V

ICHG_WA

450

500

550

(see Full-Rate Charging

VBATT = 3.6 V, IPROG = 500 mA

Mode)

USB = 5 V, VBATT = 3.6 V

450

500

550

Full-rate charging current

IPROG = 500 mA, USB_ISEL = 800 mA

ICHG_USB

from usbpwr input (see

USB = 5 V, VBATT = 3.6 V

Full-Rate Charging Mode)

405

450

495

IPROG = 500 mA, USB_ISEL = 500 mA

USB_ISEL = 100 mA

100

USB ILIMIT

USB charge-current limit

USB_ISEL = 500 mA

450

475

500

USB_ISEL = 800 mA

720

760

800

VBATT = 2.5 V, wall-adapter charge

current

10%

12%

Percentage of programmed full-rate

IPREQUAL

Pre-qualification current

current

VBATT = 2.5 V, USB charge current

VBATT rising, transition from pre-

qualification to full-rate charging

2.75

2.85

2.95

(standard)

Full-rate qualification

VFULL_RATE

threshold

VBATT rising, transition from pre-

qualification to full-rate charging (AP

2.45

2.55

2.65

version only)

VTH_H

Upper TS comparator limit

2.82

2.87

2.93

45°C CHSPV Reg D3 = 0

0.315

0.33

0.345

VTH_L

Lower TS comparator limit

50°C CHSPV Reg D3 = 1

0.255

0.27

0.285

Battery temperature sense

ITSENSE

7.75

8.25

µA

current

Regulated charger

TREG

TJ = 25°C

105

115

125

°C

junction temperature

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power

dissipation exists, special care must be paid to thermal dissipation issues in board design.

(3)

Minimum and maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the

most likely norm.

(4)

Low ESR Surface-Mount Ceramic Capacitors (MLCCs) are used in setting electrical characteristics.

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