BQ24751B Datasheet, PDF (15/38 Pages) Texas Instruments – Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector

Not Recommended For New Designs
bq24751B
www.ti.com .......................................................................................................................................................... SLUS835A – JULY 2008 – REVISED MARCH 2009
CHARGE ENABLE / DISABLE AND CURRENT SOFT-START
V_CHGEN
NONSYNCHRONOUS TO SYNCHRONOUS TRANSITION
V_HIDRV
V_BAT
V_PH
I_BAT
t − Time = 4 ms/div
Figure 27.
SYNCHRONOUS TO NONSYNCHRONOUS TRANSITION
V_PH
V_PH
V_LDDRV
I_L
t − Time = 4 ms/div
Figure 28.
NEAR 100% DUTY CYCLE BOOTSTRAP RECHARGE PULSE
V_PH
V_LODRV
V_HIDRV
I_L
t − Time = 2 ms/div
Figure 29.
BATTERY SHORTED CHARGER RESPONSE,
OVERCURRENT PROTECTION (OCP) AND CHARGE
CURRENT REGULATION
V_BAT
V_LODRV
I_L
t − Time = 4 ms/div
Figure 30.
CONTINUOUS CONDUCTION MODE (CCM) SWITCHING
WAVEFORMS
V_PH
V_HIDRV
I_L
t − Time = 400 ms/div
Figure 31.
V_LODRV
I_L
t − Time = 1 ms/div
Figure 32.
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