BQ24155 datasheet(6/30 Pages) TI

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CVREF

10 nF

CBOOT

PACK -

PACK +

CAUXPWR

SCL

SDA

CSOUT

CSIN

PGND

CBUS

VAUX

HOST

SCL

SDA

STAT

VREF

STAT

PMID

VBUS

CIN

VBUS

CIN

BOOT

ISEL

AUXPWR

ISEL

RSNS

CCSIN

VBAT

1 F

4.7 F

10kW

1.0 H

68mW

10 F

0.1 F

1 F

bq24155

SGND

bq24155

SLUS942 – FEBRUARY 2010

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

Circuit of Figure 1, VBUS = 5 V, HZ_MODE = 0, OPA_MODE = 0 (charger mode operation), TJ = 0°C to 125°C, TJ = 25°C for

typical values (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Cycle-by-cycle current limit for

I(LIMIT)

Charge mode operation

1.5

2.3

charge

Short-circuit voltage threshold

V(AUXPWR) falling

1.9

2.1

V(SHORT)

V(SHORT) hysteresis

V(AUXPWR) rising from below V(SHORT)

100

I(SHORT)

Short-circuit current

V(AUXPWR) ≤ V(SHORT)

PROTECTION

T(SHTDWN)

Thermal trip

165

Thermal hysteresis

°C

T(CF)

Thermal regulation threshold(3)

Charge current begins to reduce

120

Time constant for the 32 second

T(32S)

32 Second mode

timer

(3)

Verified by design

TYPICAL APPLICATION CIRCUITS

VBUS = 5 V, I(CHARGE) = 1250 mA, VBAT = 3.5 V to 4.44 V (adjustable), Safety Timer = 32 minutes or 32

seconds.

Figure 1. I2C Controlled 1-Cell Charger Application Circuit

VBUS = 5 V, I(IN_LIMIT) = 500 mA, VOUT = 3.5 V to 4.44 V (adjustable), Safety Timer = 32 minutes or 32 seconds.

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