Viset

Vchg

V_0.1

_OUT

W

Vout

BatteryDeclared Absent

t-time-20ms/div

100mV/div

1V/div

1V/div

5V/div

Viset

Vchg

Vout

V_0.1

_OUT

W

Battery

Threshold

Reached

t-time-500ms/div

1V/div

5V/div

1V/div

100mV/div

Viset

Vchg

Vout

V_0.1

_OUT

W

I

ClampedCurrent

OUT

I

ShortDetected

andLatchedOff

SET

t-time-200 s/div

m

1V/div

2V/div

500mV/div

100mV/div

Vin

Viset

Vchg

V_0.1 _OUT

W

t-time-1ms/div

2V/div

2V/div

20mV/div

500mV/div

Vin

Viset

Vchg

V_0.1

_OUT

W

ShortDetectedin100mA

modeandLatchedOff

t-time-5ms/div

2V/div

2V/div

500mV/div

20mV/div

bq24090, bq24091

bq24092, bq24093

www.ti.com

SLUS968A – JANUARY 2010 – REVISED FEBRUARY 2010

TYPICAL OPERATIONAL CHARACTERISTICS (continued)

Figure 7. Battery Removal with fixed TS = 0.5V

PROTECTION CIRCUITS WAVEFORMS

CH4: Iout (1A/Div)

Battery voltage swept from 0V to 4.25V to 3.9V.

CH4: Iout (1A/Div)

Figure 8. Battery Charge Profile

Figure 9. ISET Shorted During Normal Operation

CH4: Iout (0.2A/Div)

CH4: Iout (0.2A/Div)

Figure 10. ISET Shorted Prior to USB Power-up

Figure 11. DPM – Adaptor Current Limits – Vin Regulated

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.

Copyright © 2010, Texas Instruments Incorporated

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Product Folder Link(s): bq24090 bq24091