Datasheet

Vin
Viset
Vchg
Vpg
t-time-100ms/div
2V/div
2V/div
2V/div
5V/div
Vin
Viset
Vchg
Vpg
t-time-20ms/div
2V/div
2V/div
5V/div
2V/div
Vin
D+
Vd-
Viset
Vchg
t-time-100ms/div
2V/div
2V/div
5V/div
1V/div
1V/div
Vin
D+
Vd-
Viset
Vchg
Endof
Detection
Routine
DetectionRoutine
Started
USBCommunication
BetweenHostand
DeviceReceiver
t-time-50ms/div
2V/div
5V/div
2V/div
1V/div
1V/div
D+
Vd-
Viset
Vchg
t-time-10ms/div
2V/div
2V/div
2V/div
1V/div
1V/div
Vin
Vin
D+
Vd-
Viset
Vchg
t-time-100ms/div
2V/div
2V/div
5V/div
1V/div
1V/div
bq24050
bq24052
bq24055
www.ti.com SLUS940B –SEPTEMBER 2009–REVISED JUNE 2012
TYPICAL OPERATIONAL CHARACTERISTICS
SETUP: bq24055 typical applications schematic; V
IN
= 5V, V
BAT
= 3.6V (unless otherwise indicated)
R
ISET
= 1k; I
OUT_FAST_CHG
= 540mA; R
PAC_TERM
= 2k; I
OUT_PRE_CHG
= 108mA; I
OUT_TERM
= 54mA
Power UP, DOWN, OVP, Disable and Enable Waveforms
No signal detected on D+ or D-. After 500ms, the detection routine is
Detected D- line pulled to 0.6V and the detection routine is started.
forced to run.
Figure 1. D+ D- Detection for Adaptor Hot Plug Figure 2. D+ D- Detection for Unknown Source Hot Plug
(Device transceiver is "dead") After 500ms, the detection routine is
forced to run.
Figure 3. D+ D- Detection for USB Hot Plug no Pullup Figure 4. D+ D- Detection for USB Hot Plug with Pullup
Figure 5. OVP 8V Adaptor – Hot Plug Figure 6. OVP from Normal Operation –
V
IN
= 0V→5V→8V→5V
Copyright © 2009–2012, Texas Instruments Incorporated 11