Datasheet
bq24270
bq24271
www.ti.com
SLUSB10 –JUNE 2012
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
MIN MAX UNIT
USB –2 20 V
PMID, BYP, BOOT –0.3 20 V
Pin voltage range (with respect to VSS)
SW –0.7 12 V
SDA, SCL, SYS, BAT, STAT, BGATE, DRV, TS, D+, D-, INT,
–0.3 7 V
PSEL, CD
BOOT to SW –0.3 7 V
SW 4.5 A
Output current (continuous)
SYS 3.5 A
Input current (continuous) USB 1.75 A
STAT 10 mA
Output sink current
INT 1 mA
Operating free-air temperature range -40 85 °C
Junction temperature, T
J
-40 125 °C
Storage temperature, T
STG
–65 150 °C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage
values are with respect to the network ground terminal unless otherwise noted.
THERMAL INFORMATION
bq24270 and bq24721
THERMAL METRIC
(1)
UNITS
YFF (48 PINS) RGE (24 PINS)
θ
JA
Junction-to-ambient thermal resistance 49.8 32.6
θ
JCtop
Junction-to-case (top) thermal resistance 0.2 30.5
θ
JB
Junction-to-board thermal resistance 1.1 3.3
°C/W
ψ
JT
Junction-to-top characterization parameter 1.1 0.4
ψ
JB
Junction-to-board characterization parameter 6.6 9.3
θ
JCbot
Junction-to-case (bottom) thermal resistance N/A 2.6
spacer
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
(1)
MIN MAX UNITS
USB voltage range 4.2 18
V
USB
V
USB operating range 4.2 6
I
USB
Input current USB input 1.5 A
I
SYS
Output Current from SW, DC 3 A
Charging 1.5
I
BAT
A
Discharging, using internal battery FET 2.5
T
J
Operating junction temperature range 0 125 ºC
(1) The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the BOOT or SW pins. A tight
layout minimizes switching noise.
Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): bq24270 bq24271