BQ24392_15 Datasheet, PDF (6/22 Pages) Texas Instruments – bq24392 Dual SPST USB 2.0 High Speed Switch with USB Battery Charging Specification Revision 1.2 Detection

bq24392
SLIS146C – JUNE 2012 – REVISED JANUARY 2015
7 Detailed Description
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7.1 Overview
The BQ24932 is a USB 2.0 high-speed isolation switch with charger detection capabilities for use with micro and
mini-USB ports. Upon plugin of a Battery Charging Specification 1.2 (BCv1.2) compliant, Apple™, TomTom™, or
other USB charger into a micro or mini-USB connector, the device will automatically detect the charger and
operate the USB 2.0 high-speed isolation switch.
The BQ24932 device is powered through VBUS when a charger is attached to the micro or mini-USB port and
has a 28-V tolerance to avoid the need for external protection.
7.2 Functional Block Diagram
BQ24392
USB
HOST
DM_HOST
DP_HOST
Switch
MMaattrriixx
Supply
Detect
VBUS
DM_CON
DP_CON
ID_CON
GND
Micro
USB
SYSTEM
&
CHARGER
GOOD_BAT
SW_OPEN
CHG_AL_N
CHG_DET
Logic
DP/DM
Comparator
6
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