BQ24742 Datasheet, PDF (14/35 Pages) Texas Instruments – Li-Ion or Li-Polymer Battery Charger with Low Iq and Accurate Trickle Charge

bq24741, bq24742
SLUS875B – MARCH 2009 – REVISED OCTOBER 2009
CHARGE ENABLE
and
CURRENT SOFT-START
Time = 2 ms/div
Figure 21.
TRICKLE DISABLE
and
CURRENT SOFT-START
TRICKLE
SW
LODRV
I_L
Time = 2 ms/div
Figure 23.
NON-SYNCHRONOUS
to
SYNCHRONOUS TRANSITION
SW
LODRV
I_L
Time = 2 μs/div
Figure 25.
CHARGE DISABLE
CE
I_L
SW
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LODRV
Time = 4 μs/div
Figure 22.
SYNCHRONOUS
to
NON-SYNCHRONOUS TRANSITION
SW
LODRV
I_L
Time = 2 μs/div
Figure 24.
CONTINUOUS CONDUCTION MODE
SWITCHING WAVEFORMS
HIDRV
LODRV
SW
I_L
Time = 200 ns/div
Figure 26.
14
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