BQ24158_12 Datasheet, PDF (11/45 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger

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VBUS
100 mV/div,
5.05 V Offset
VBAT
100 mV/div,
3.5 V Offset
bq24153A, bq24156A
bq24158, bq24159
SLUSAB0A – OCTOBER 2010 – REVISED FEBRUARY 2012
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
BOOST WAVEFORM (PFM MODE)
VBUS OVERLOAD WAVEFORMS (BOOST MODE)
VBUS
2 V/div
VPMID
200 mV/div,
5.02 V Offset
VSW
2 V/div
VSW
5 V/div
I_L
0.2 A/div
5 mS/div
Figure 16. VBUS = 5.05 V, V_BAT = 3.5V, I_BUS = 42 mA
LOAD STEP UP RESPONSE (BOOST MODE)
VBUS
100 mV/div,
5.05 V Offset
VBAT
0.2 V/div,
3.5 V Offset
VSW
5 V/div
I_BAT
0.1 A/div
100 mS/div
Figure 18. VBUS = 5.05 V, V_BAT = 3.5V, I_BUS = 0-217 mA
BOOST TO CHARGE MODE TRANSITION (OTG CONTROL)
VBUS
0.5 V/div,
4.5 V Offset
OTG
2 V/div
I_BUS
0.2 A/div
5 mS/div
Figure 17. VBUS = 5.05 V, V_BAT = 3.5V, R_LOAD (at VBUS) =
1KΩ to 0.5Ω
LOAD STEP DOWN RESPONSE (BOOST MODE)
VBUS
100 mV/div,
5.05 V Offset
VBAT
0.2 V/div,
3.5 V Offset
VSW
5 V/div
I_BAT
0.1 A/div
100 mS/div
Figure 19. VBUS = 5.05 V, V_BAT = 3.5V, I_BUS = 217 mA
BOOST EFFICIENCY
95
VBAT = 2.7 V
VBAT = 3.6 V
VBAT = 4.2 V
90
85
VSW
80
5 V/div
I_L
75
0.5 A/div
70
10 mS/div
0
Figure 20. VBUS = 4.5 V (Charge Mode) / 5.1 V
(Boost Mode), V_BAT = 3.5V, I_{IN_LIM} = 500 mA, (32S mode)
50
100
150
200
Load Current at VBUS - mA
Figure 21.
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Product Folder Link(s): bq24153A bq24156A bq24158 bq24159