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BQ24751RHDRG4 Datasheet, PDF (16/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger
bq24751
SLUS734D – DECEMBER 2006 – REVISED MARCH 2009............................................................................................................................................... www.ti.com
CHARGE ENABLE / DISABLE AND CURRENT SOFT-START
VCHGEN
NONSYNCHRONOUS TO SYNCHRONOUS TRANSITION
VHIDRV
VBAT
VPH
IBAT
t − Time = 4 ms/div
Figure 27.
SYNCHRONOUS TO NONSYNCHRONOUS TRANSITION
VPH
VPH
VLDDRV
IL
t − Time = 4 ms/div
Figure 28.
NEAR 100% DUTY CYCLE BOOTSTRAP RECHARGE PULSE
VPH
VLODRV
VHIDRV
IL
t − Time = 2 ms/div
Figure 29.
BATTERY SHORTED CHARGER RESPONSE,
OVERCURRENT PROTECTION (OCP) AND CHARGE
CURRENT REGULATION
VBAT
VLODRV
IL
t − Time = 4 ms/div
Figure 30.
CONTINUOUS CONDUCTION MODE (CCM) SWITCHING
WAVEFORMS
VPH
VHIDRV
IL
t − Time = 400 ms/div
Figure 31.
VLODRV
IL
t − Time = 1 ms/div
Figure 32.
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