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| BQ24392_15 Datasheet, PDF (7/22 Pages) Texas Instruments – bq24392 Dual SPST USB 2.0 High Speed Switch with USB Battery Charging Specification Revision 1.2 Detection | |||
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7.3 Feature Description
7.3.1 Charger Detection
bq24392
SLIS146C â JUNE 2012 â REVISED JANUARY 2015
POWERUP
VVBUS > VVBUS_UV
IDLE
VVBUS> VVBUS(valid)
GOOD_BAT = 1
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
GOOD_BAT=0
Start Dead
Battery Provision
(DBP) Timer
32 Mins Expire
Disable charging
Figure 3. Charge Detection Block Diagram
Copyright © 2012â2015, Texas Instruments Incorporated
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