Datasheet

Vin
Viset
Vchg
V_0.1 _OUTW
t-time-500 s/divm
2V/div
2V/div
500mV/div
20mV/div
Viset
Vout
Vin
V_0.1 _OUTW
Exits
Thermal
Regulation
Enters
Thermal
Regulation
t-time-1s/div
2V/div
1V/div
1V/div
50mV/div
Vin
Viset
Vchg
V_0.1 _OUTW
ShortDetectedin100mA
modeandLatchedOff
t-time-5ms/div
2V/div
2V/div
500mV/div
20mV/div
Vin
Viset
Vchg
V_0.1 _OUTW
t-time-1ms/div
2V/div
2V/div
20mV/div
500mV/div
Viset
Vchg
Vout
V_0.1 _OUTW
I ClampedCurrent
OUT
I ShortDetected
andLatchedOff
SET
t-time-200 s/divm
1V/div
2V/div
500mV/div
100mV/div
Viset
Vchg
Vout
V_0.1 _OUTW
Battery
Threshold
Reached
t-time-500ms/div
1V/div
5V/div
1V/div
100mV/div
bq24050
bq24052
bq24055
www.ti.com SLUS940B –SEPTEMBER 2009–REVISED JUNE 2012
TYPICAL OPERATIONAL CHARACTERISTICS (continued)
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
PROTECTION CIRCUITS WAVEFORMS
CH4: Iout (1A/Div)
CH4: Iout (1A/Div)
Battery voltage swept from 0V to 4.25V to 3.9V.
Figure 12. Battery Charge Profile Figure 13. ISET Shorted During Normal Operation
CH4: Iout (0.2A/Div)
CH4: Iout (0.2A/Div)
Figure 14. ISET Shorted Prior to USB Power Up Figure 15. DPM – Adaptor Current Limits – V
IN
Regulated
to 4.3V
The IC temperature rises to 125°C and enters thermal regulation.
Charge current is reduced to regulate the IC at 125°C. VIN is
reduced, the IC temperature drops, the charge current returns to the
programmed value.
Figure 16. DPM – USB Current Limits – V
IN
Regulated to Figure 17. Thermal Reg. – V
IN
Increases
4.4V
Copyright © 2009–2012, Texas Instruments Incorporated 13