BQ24392-Q1_15 Datasheet, PDF (8/22 Pages) Texas Instruments – BQ24392-Q1 Dual SPST USB 2.0 High Speed Switch With USB Battery Charging Specification Revision 1.2 Detection

BQ24392-Q1
SLIS160B – AUGUST 2014 – REVISED JANUARY 2015
7.3 Feature Description
7.3.1 Charger Detection
POWERUP
V_VBUS > V_{VBUS_UV}
IDLE
VVBUS> VVBUS(valid)
GOOD_BAT = 1
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DATA CONTACT DETECTION
600-ms Timeout Feature
USB BCv 1.2 compliant
Not USB BCv 1.2 compliant
PRIMARY DETECTION
CHECK VOLTAGE LEVEL ON
DP_CON & DM_CON
SDP charger Not SDP charger
SECONDARY DETECTION
Apple
Charger
TomTom
Charger
No Charger
Standard
Downstream Port
(SDP)
GOOD_BAT=1 GOOD_BAT=0
Dedicated
Charging Port
(DCP)
Charging
Downstream Port
(CDP)
GOOD_BAT=1 GOOD_BAT=0
USB
SWITCH ON
USB
SWITCH OFF
USB
SWITCH ON
USB
SWITCH OFF
8
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GOOD_BAT=0
Start Dead
Battery Provision
(DBP) Timer
32 Mins Expire
Disable charging
Figure 3. Logic Tree
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