BQ24040_16 Datasheet, PDF (26/38 Pages) Texas Instruments – Single Cell Li-Ion and Li-Pol Battery Charger With Auto Start

bq24040, bq24041, bq24045
SLUS941F – SEPTEMBER 2009 – REVISED MARCH 2015
Typical Applications (continued)
Vout _1V/div
500mV/div
Viset
Vchg 2V/div
V_0.1 W_OUT
I_OUT Clamped Current
100mV/div
I_SET Short Detected
and Latched Off
CH4: I_OUT (1A/Div)
t - time - 200ms/div
Figure 28. ISET Shorted During Normal Operation
Vin
Vchg
2V/div
2V/div
500mV/div
20mV/div
Viset
V_0.1W_OUT
t - time - 1ms/div
CH4: I_OUT (0.2A/Div)
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Vchg
Vin
2V/div
2V/div
Viset
500mV/div
20mV/div
Short Detected in 100mA
mode and Latched Off
V_0.1 W_OUT
t - time - 5ms/div
CH4: I_OUT (0.2A/Div)
Figure 29. ISET Shorted Prior to USB Power-up
Vin 2V/div
Vchg _2V/div
500mV/div
20mV/div
Viset
V_0.1W_OUT
t - time - 500ms/div
Figure 30. DPM – Adaptor Current Limits – Vin Regulated
Vout
1V/div
Enters
Thermal
Regulation
Vin _2V/div
Exits
Thermal
Regulation
Figure 31. DPM – USB Current Limits – Vin Regulated to
4.4V
Vin
1V/div
Viset
V_0.1W_OUT
50mV/div
1V/div
t - time - 1s/div
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 32. Thermal Reg. – Vin increases PWR/Iout
Reduced
Vchg
Viset _1V/div
Vpg
5V/div
5V/div
t - time - 20ms/div
V_IN swept from 5V to 3.9V to 5V
V_BAT = 4V
Figure 33. Entering and Exiting Sleep mode
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