BQ24271YFFR datasheet(6/38 Pages) TI

Part #	BQ24271YFFR

Description	1.5A, Singe Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path

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Manufacturer	TI [Texas Instruments]

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bq24270

bq24271

SLUSB10 – JUNE 2012

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

Circuit of Figure 3, V(UVLO) < V(USB) < V(OVP) AND V(USB) > V(BAT)+V(SLP), TJ = 0°C–125°C and TJ = 25°C for typical values

(unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

BATTERY-PACK NTC MONITOR

VHOT

High temperature threshold

V(TS) falling

29.7

30

30.5

%VDRV

VHOT(HYS)

Hysteresis on high threshold

V(TS) rising

1

VWARM

High temperature threshold

V(TS) falling

37.9

38.3

39.6

%VDRV

VWARM(HYS)

Hysteresis on high threshold

V(TS) rising

1

VCOOL

Low temperature threshold

V(TS) rising

56

56.5

56.9

%VDRV

VCOOL(HYS)

Hysteresis on low threshold

V(TS) falling

1

VCOLD

Low temperature threshold

V(TS) rising

59.5

60

60.4

%VDRV

VCOLD(HYS)

Hysteresis on low threshold

V(TS) falling

1

TSOFF

TS Disable threshold

V(TS) rising, 2% V(DRV) Hysteresis

70

73

%VDRV

tDGL(TS)

Deglitch time on TS change

50

ms

D+/D- Detection (bq24270)

VD+_SRC

D+ Voltage Source

0.5

0.6

0.7

V

D+ Connection Check Current

ID+_SRC

7

14

µA

Source

ID-_SINK

D- Current Sink

50

100

150

µA

D-, switch open

–1

1

µA

ID_LKG

Leakage Current into D+/D-

D+, switch open

–1

1

µA

VD+_LOW

D+ Low Comparator Threshold

0.8

V

VD-_LOW

D- Low Comparator Threshold

250

400

mV

RD-_DWN

D- Pulldown for Connection Check

14.25

24.8

k

Ω

BATGD Operation

VBATGD

Good Battery threshold

3.6

3.8

3.9

V

Deglitch for good battery threshold

V(BAT) rising to HIGH-Z mode, DEFAULT Mode Only

32

ms

I

2C Compatible Interface

VIH

Input high threshold level

V(PULL-UP) = 1.8 V, SDA and SCL

1.3

V

VIL

Input low threshold level

V(PULL-UP) = 1.8 V, SDA and SCL

0.4

V

VOL

Output low threshold level

IL = 10 mA, sink current

0.4

V

IBIAS

High-Level leakage current

V(PULL-UP) = 1.8 V, SDA and SCL

1

µA

tWATCHDOG

Watchdog Timer timeout

30

s

6

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